{"product_id":"mp350a4r-new-original-mp350a4r-nidec-inverter-drives","title":"MP350A4R New Original MP350A4R Nidec Inverter Drives","description":"\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\"\u003eProduct Description\u003c\/h2\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch3 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\"\u003eNidec Control Techniques MP350A4R — Mentor MP DC Drive | 350A | 125kW | 200HP | 480V | 4-Quadrant Regenerative | New Original In Stock\u003c\/h3\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eDC motors don't become obsolete just because the industry gravitated toward AC drives. In high-power applications — paper mills, steel rolling lines, large extruders, winding machines, test stands — a well-maintained DC motor with a modern digital drive delivers controlled torque and speed that is genuinely difficult to match with an AC alternative at the same cost. The challenge historically was the drive itself: older analog DC drives required specialist knowledge to commission, drifted over time, and offered none of the network integration that modern plant control systems expect.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eThe MP350A4R solves that problem. It's Control Techniques' fifth-generation DC drive — the Mentor MP platform — built around the same digital control core as their Unidrive SP AC drive. That heritage matters: the commissioning tools, the option module ecosystem, the parameter structure, and the communications architecture all reflect decades of AC drive refinement applied to a DC converter. A panel builder already familiar with Control Techniques products will find the MP350A4R immediately recognizable. An engineer migrating from a Mentor II installation will find that the physical footprint and power terminal layout are unchanged.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eAt 350A armature output, 125kW on a 480V supply, with full four-quadrant regenerative capability, the MP350A4R handles demanding continuous-duty industrial applications that would stress smaller drives.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e✅ \u003cstrong\u003eGenuine Nidec Control Techniques. New original. Ships worldwide via DHL \/ FedEx \/ UPS.\u003c\/strong\u003e\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch3 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cdiv class=\"overflow-x-auto w-full px-2 mb-6\"\u003e\n\u003ctable class=\"min-w-full border-collapse text-sm leading-[1.7] whitespace-normal\"\u003e\n\u003cthead class=\"text-left\"\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\" class=\"text-text-100 border-b-0.5 border-border-300\/60 py-2 pr-4 align-top font-bold\"\u003eParameter\u003c\/th\u003e\n\u003cth scope=\"col\" class=\"text-text-100 border-b-0.5 border-border-300\/60 py-2 pr-4 align-top font-bold\"\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e\u003cstrong\u003eModel Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e\u003cstrong\u003eMP350A4R\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e\u003cstrong\u003eDrive Series\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003eMentor MP — DC Thyristor Drive\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e\u003cstrong\u003eFrame Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e\u003cstrong\u003e2A\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e\u003cstrong\u003eMax. Armature Current\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e\u003cstrong\u003e350A continuous\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e\u003cstrong\u003eMotor Power @ 480V\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e\u003cstrong\u003e125 kW \/ 200 HP\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e\u003cstrong\u003eMax. Field Current\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e\u003cstrong\u003e20A (standard internal controller)\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e\u003cstrong\u003eSupply Voltage Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e\u003cstrong\u003e24V to 480V AC (–20% \/ +10%)\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e\u003cstrong\u003eQuadrant Operation\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e\u003cstrong\u003e4-quadrant regenerative\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e\u003cstrong\u003eOverload Capability\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e150% for 30 seconds (up to 10 times\/hr at 40°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e\u003cstrong\u003eCooling\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003eForced cooled (internal fan)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e\u003cstrong\u003eIP Rating\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e\u003cstrong\u003eIP10 (Frame 2A)\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e\u003cstrong\u003eOperating Temp (no derate)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e\u003cstrong\u003e0°C to 40°C\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e\u003cstrong\u003eOperating Temp (with derate)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e0°C to 55°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e\u003cstrong\u003eStorage Temperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e–40°C to 55°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e\u003cstrong\u003eAltitude\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e1,000m no derate; 1,000–3,000m: 1% per 100m\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e\u003cstrong\u003eHumidity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e95% non-condensing at 40°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e\u003cstrong\u003ePollution Degree\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e2 (dry, non-conducting)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e\u003cstrong\u003eDimensions (H × W × D)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e\u003cstrong\u003e640 × 495 × 301 mm \/ 25.20 × 19.49 × 11.85 in\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e\u003cstrong\u003e38 kg \/ 83.8 lb\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e\u003cstrong\u003eOption Module Slots\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e\u003cstrong\u003e3 universal option slots\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e\u003cstrong\u003eOn-Board PLC\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e6kB user program memory\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e\u003cstrong\u003eControl I\/O\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e3× analog in, 2× analog out, 3× digital I\/O, 4× digital in, 2× N.O. relay (250V AC max)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e\u003cstrong\u003eAnalog Input Resolution\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003eInput 1: 14-bit + sign; Inputs 2 \u0026amp; 3: 10-bit + sign\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e\u003cstrong\u003eOperating Modes\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003eEstimated speed (open loop), tacho feedback, encoder feedback\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e\u003cstrong\u003eCommunications (via options)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003eRS485, Ethernet, EtherCAT, PROFIBUS, DeviceNET, CANopen, Interbus\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e\u003cstrong\u003eCertifications\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e\u003cstrong\u003eCE, cUL (USA\/Canada), KC (Korea), RCM (Australia\/NZ), EAC\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e\u003cstrong\u003eWarranty\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e\u003cstrong\u003e5 years standard\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e\u003cstrong\u003eProduct Safety Standard\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003eEN61800-5-1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e\u003cstrong\u003eEMC Emission Compliance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003eCategory C3 without filters; C2 with recommended filters\/reactors\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch3 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\"\u003eFour-Quadrant Operation — What It Means and Why It Matters\u003c\/h3\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eA DC drive's quadrant designation describes what it can do with power flow and direction of rotation. This is not an abstract classification — it determines whether the drive can handle certain types of loads and braking requirements.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eTwo-quadrant\u003c\/strong\u003e drives (no \"R\" suffix) handle forward motoring and can control current during deceleration, but they cannot feed energy back to the AC supply. Braking energy is typically dissipated as heat in a dynamic braking resistor.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eFour-quadrant regenerative\u003c\/strong\u003e drives like the MP350A4R can motor in both directions AND return braking energy to the AC supply grid during deceleration. The thyristor bridge fires in a controlled sequence that reverses current flow, effectively running the drive as an inverter (in the AC sense) to push energy upstream. This has two practical consequences:\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eFirst, operating costs are lower in high-cycle or continuous braking applications. A winding machine that repeatedly accelerates and decelerates a large roll of material can recover substantial energy during each deceleration phase rather than burning it off in resistors. Second, braking performance is cleaner — the AC grid absorbs the energy instead of a resistor bank heating up, and the torque control during braking is as precise as during motoring because the same thyristor bridge handles both.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eApplications that specifically need four-quadrant operation include: winders and unwinders with tension control, hoists and cranes with regenerative lowering, test stands that both drive and absorb load, large centrifuges, and any process where the motor frequently operates against its direction of rotation.\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch3 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\"\u003eThe Mentor MP Control Architecture\u003c\/h3\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eWhat distinguishes the Mentor MP from earlier generations of DC drives is not primarily the power electronics — a thyristor bridge is a mature technology. The differentiation is in the digital control platform, which Control Techniques developed from their Unidrive SP AC drive rather than building a DC-specific controller from scratch.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eThree universal option module slots\u003c\/strong\u003e accept the same SM-series option modules used across Control Techniques' AC drive range. A communications module for PROFIBUS goes into a Mentor MP the same way it goes into a Unidrive M700. An encoder feedback module, an I\/O expansion module, a machine control module with application programming — all available from the same module ecosystem. This matters for system integrators who are already familiar with one option module type: it transfers directly.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eOn-board PLC with 6kB\u003c\/strong\u003e of user program memory runs structured text or other IEC 61131-3 code directly in the drive. Simple sequencing logic, tension control algorithms, winder calculations — these can execute inside the MP350A4R without requiring a separate external controller for process logic.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eCTSoft commissioning software\u003c\/strong\u003e connects via Ethernet, CTNet, serial, or USB. For engineers migrating from Mentor II, a built-in migration wizard transfers parameter sets to the Mentor MP format automatically. This is a meaningful time saving during retrofit projects where the Mentor II parameter set represents years of tuned application-specific adjustments.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eGalvanic isolation between power and control\u003c\/strong\u003e circuits — documented as a patent-pending feature at the time of the Mentor MP's release — protects control circuits and any equipment connected to the drive's control terminals from the high voltages present on the power thyristor circuit. On a drive handling up to 480V AC input and hundreds of amps of DC output, this isolation is a genuine protection benefit rather than a marketing claim.\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch3 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\"\u003eField Control — Internal vs. FXMP25 External\u003c\/h3\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eEvery MP350A4R includes an internal field controller as standard. For the majority of DC motor applications, this built-in controller provides complete field regulation, including intelligent field weakening for constant-power operation above base speed. The internal controller handles field currents up to 20A, which covers most industrial DC motors in the 125kW class.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eThree situations call for the optional FXMP25 external field controller instead:\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eThe motor requires more than 20A field current — typically older motors with low field voltage windings that draw higher current to achieve rated field flux. The FXMP25 extends field current capability to 25A and can be controlled digitally via RJ45 connection from the main drive.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eThe application requires forced field weakening faster than a standard half-controlled field bridge allows — spindle drives and motors with high field time constants where the field must collapse quickly for rapid speed range changes.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eField current reversal is needed without armature reversal — a specific four-quadrant technique applicable where rapid torque direction reversal isn't required but direction of rotation needs to change.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eFor standard industrial applications with motors in good condition and field windings within normal parameters, the built-in controller handles everything without the FXMP25.\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch3 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\"\u003eMentor MP Model Family at 480V — Size Reference\u003c\/h3\u003e\n\u003cdiv class=\"overflow-x-auto w-full px-2 mb-6\"\u003e\n\u003ctable class=\"min-w-full border-collapse text-sm leading-[1.7] whitespace-normal\"\u003e\n\u003cthead class=\"text-left\"\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\" class=\"text-text-100 border-b-0.5 border-border-300\/60 py-2 pr-4 align-top font-bold\"\u003eModel\u003c\/th\u003e\n\u003cth scope=\"col\" class=\"text-text-100 border-b-0.5 border-border-300\/60 py-2 pr-4 align-top font-bold\"\u003eArmature Current\u003c\/th\u003e\n\u003cth scope=\"col\" class=\"text-text-100 border-b-0.5 border-border-300\/60 py-2 pr-4 align-top font-bold\"\u003ePower (480V)\u003c\/th\u003e\n\u003cth scope=\"col\" class=\"text-text-100 border-b-0.5 border-border-300\/60 py-2 pr-4 align-top font-bold\"\u003eFrame\u003c\/th\u003e\n\u003cth scope=\"col\" class=\"text-text-100 border-b-0.5 border-border-300\/60 py-2 pr-4 align-top font-bold\"\u003eQuadrant\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003eMP210A4R\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e210A\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e75 kW \/ 125 HP\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e1B\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e4Q Regen\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e\u003cstrong\u003eMP350A4R\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e\u003cstrong\u003e350A\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e\u003cstrong\u003e125 kW \/ 200 HP\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e\u003cstrong\u003e2A\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e\u003cstrong\u003e4Q Regen\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003eMP420A4R\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e420A\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e150 kW \/ 250 HP\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e2A\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e4Q Regen\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003eMP550A4R\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e550A\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e200 kW \/ 300 HP\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e2A\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e4Q Regen\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003eMP700A4R\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e700A\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e250 kW \/ 400 HP\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e2B\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e4Q Regen\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003eMP350A4\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e350A\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e125 kW \/ 200 HP\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e2A\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e2Q only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eThe \"R\" suffix is the critical differentiator for regenerative applications. The MP350A4 (no R) uses the same frame, same armature current rating, and same physical dimensions but lacks the second anti-parallel thyristor bridge required for four-quadrant operation.\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch3 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\"\u003eTypical Applications\u003c\/h3\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eThe MP350A4R's 125kW \/ 350A \/ 4-quadrant rating places it in demanding industrial territory. Applications where this drive is commonly found:\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003ePaper and printing\u003c\/strong\u003e — Winding, unwinding, and tension control on paper rolls require precise torque in all four quadrants. The regenerative capability allows controlled braking during deceleration without resistor banks, and the on-board PLC handles winder diameter compensation calculations.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eMetal processing\u003c\/strong\u003e — Wire drawing, coil winding, and rolling mill auxiliary drives benefit from the high armature current rating and four-quadrant operation. DC motors on these applications often represent capital equipment that will run for decades; upgrading the drive to Mentor MP extends motor life rather than replacing the motor.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eTest stands\u003c\/strong\u003e — Dynamometer and load simulation applications need to operate the connected machine as a generator as well as a motor. The MP350A4R absorbs energy from the device under test and returns it to the supply rather than wasting it in resistors.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eHoists and cranes\u003c\/strong\u003e — Regenerative lowering of heavy loads recovers energy that would otherwise be dissipated as heat. On high-cycle operations such as steel plant charging cranes, the energy savings accumulate to a meaningful operational cost reduction.\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch4 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\"\u003e❓ FAQ — Nidec Control Techniques MP350A4R\u003c\/h4\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eQ1: What does the \"R\" suffix mean, and do I need it for my application?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eThe \"R\" suffix identifies four-quadrant regenerative operation, enabled by a fully controlled anti-parallel thyristor bridge configuration. It means the drive can both supply current to the motor (motoring) and receive current from the motor acting as a generator (braking), in both directions of rotation. If your application involves controlled deceleration of large inertia loads, bidirectional operation, active tension control, or hoist\/crane duty where the load drives the motor during lowering, you need the \"R\" variant. Two-quadrant drives (MP350A4 without R) can still decelerate, but they do so by reducing armature current and allowing the load to coast, or through a dynamic braking resistor — not by feeding energy back to the AC supply. For applications with light braking duty and unidirectional operation, the non-R version may be sufficient and is slightly less expensive.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eQ2: What supply voltage does the MP350A4R accept, and is it suitable for both 460V and 380V installations?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eThe \"4\" in the model number designates the 480V voltage class, with a supply range of 24V to 480V AC (–20% \/ +10%). This makes it compatible with 208V, 240V, 380V, 400V, 415V, and 460\/480V three-phase supplies. The –20% tolerance on the lower end means even a nominal 380V supply dipping under load is acceptable. The +10% upper tolerance on 480V means a 528V supply condition would exceed the input rating. For 575V or 690V supplies, separate model variants exist (MP350A5R, MP350A6R) with different voltage class designators.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eQ3: The datasheet lists IP10 protection for the Frame 2A size — what does IP10 mean for installation?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eIP10 (also noted as NEMA 1 equivalent in some documentation) means the enclosure provides protection against solid objects greater than 50mm — essentially a finger-safe classification — but offers no protection against liquids. The Frame 2A Mentor MP is an open chassis drive intended for installation inside a control panel or equipment enclosure that provides the final environmental protection. It is not suitable for direct exposure to moisture, oil mist, conductive dust, or corrosive atmospheres. For installations in particularly harsh environments, the conformal-coated variant (MP350A4R-CC) provides additional protection for the electronics against humidity and mild chemical attack, but the IP rating of the enclosure itself remains the same — the control panel must provide the physical environmental protection.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eQ4: How does the on-board 6kB PLC work, and what kinds of application programs can run in the drive?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eThe Mentor MP's on-board PLC executes user-written programs in the drive's own processor, independently of any external controller. The 6kB of program memory supports structured text code written in Control Techniques' SyPTPro or Drive Solutions Programmer software tools. Typical applications for on-board PLC programs include winder control with diameter compensation, tension regulation loops, sequential startup\/shutdown sequences, and custom parameter manipulation. The advantage over external PLC control for these functions is speed: the on-board program executes at the drive's own task rate, giving direct access to drive parameters without the latency of a network transaction. For more complex machine logic, the SM-Applications Plus option module adds extended on-board processing capability.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eQ5: Can the MP350A4R replace a Mentor II drive directly, and what is involved in the migration?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eYes — direct mechanical and power replacement is one of the design goals of the Mentor MP platform. The Frame 2A Mentor MP has the same physical footprint and the same power terminal connection positions as the equivalent Mentor II frame. Bolting the new drive into the existing panel and connecting the existing power wiring is mechanically straightforward. The control wiring requires verification because terminal assignments differ between generations. Control Techniques provides a free CTSoft migration wizard that reads a Mentor II parameter set and generates the equivalent Mentor MP parameter file, handling the translation of parameter numbers and scaling between the two platforms. This significantly reduces commissioning time compared to manual re-entry of a large parameter set. Any custom application programs in the Mentor II (if using Mentor II's application programming features) would need to be reviewed and adapted for the Mentor MP's on-board PLC environment.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eQ6: What communications options are available, and how are they installed?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eThe MP350A4R has three universal option module slots that accept SM-series communications modules. Available communications options include SM-PROFIBUS, SM-Ethernet, SM-EtherCAT, SM-DeviceNET, SM-CANopen, and SM-Interbus. RS485 serial communication is built into the drive without requiring an option module. A single RJ45 connector on the drive provides Ethernet connectivity for CTSoft commissioning software. Option modules slide into the option slots and are recognized automatically by the drive firmware — no hardware configuration switches are involved. Multiple option modules can occupy different slots simultaneously, so a drive can have PROFIBUS for machine-level communication in slot 1, and SM-I\/O Plus for expanded I\/O in slot 2, running concurrently. The third slot can be held as a spare for future expansion.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eQ7: What does the 5-year standard warranty cover, and how does it compare to other DC drive suppliers?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eNidec Control Techniques offers a 5-year standard warranty on the Mentor MP as part of their standard product terms — no registration required, no additional purchase needed. This covers manufacturing defects in materials and workmanship for the drive unit from the date of purchase. The 5-year term is notable in the industrial drive market, where 1–2 year warranties are more typical at this power level. This warranty position reflects the company's stated confidence in the Mentor MP's reliability and is explicitly highlighted in their product literature as a competitive differentiator. For OEM applications where long machine service intervals are expected, the warranty term reduces the total cost of ownership calculation compared to drives requiring earlier planned replacement or warranty purchases.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0635\/6516\/8701\/files\/MP350A4R_1_800x800_7c703122-8359-4399-a726-3c63e701eba1.jpg?v=1772793691\"\u003e\u003c\/p\u003e","brand":"topsdevice","offers":[{"title":"Default Title","offer_id":42781903454269,"sku":null,"price":5317.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0635\/6516\/8701\/files\/MP350A4R.jpg?v=1773721821","url":"https:\/\/topsdevice.com\/products\/mp350a4r-new-original-mp350a4r-nidec-inverter-drives","provider":"topsdevice","version":"1.0","type":"link"}