25C-A4P8N104 — 525 Series AC Drive, 120V Single-Phase, 0.75 kW, IP20

The 25C-A4P8N104 is a 0.75 kW / 1 HP variable frequency drive from the 525 series, configured for 100–120V AC single-phase input with 4.8A output current. It carries the full 525 platform feature set in the standard IP20 open-type housing: dual-port EtherNet/IP built in, sensorless vector control, Safe Torque Off, and a secondary option port. At this power level and input voltage, it's a natural fit for small motors running from standard North American 120V circuits that need variable speed and network connectivity.

The 525 series is a considered step up from basic V/Hz-only drives at this power level. The embedded EtherNet/IP means no add-on communication card is ever needed — speed reference, run/stop, fault status, output current, and operating temperature are all accessible as controller tags from day one. For machine builders integrating small drives into EtherNet/IP systems, that's a meaningful time-saver at commissioning and a genuine maintenance advantage afterward.

Specifications

Parameter	Value
Part Number	25C-A4P8N104
Series	525 Series
Power Rating	0.75 kW / 1 HP
Input Voltage	100–120V AC, Single-Phase
Output Current	4.8 A (three-phase output)
Output Frequency Range	0–500 Hz
Control Modes	V/Hz, Sensorless Vector (SVC)
Embedded Communication	EtherNet/IP dual-port (built-in)
DLR Support	Yes
Option Port	1 × peripheral expansion slot
Digital Inputs	6 × 24V DC (programmable)
Analog Inputs	2 × 0–10V / 0–20 mA (selectable)
Relay Output	1 × Form C (NO + NC)
Safe Torque Off	Category 3 / PLd (hardwired, standard)
Enclosure	IP20 / Open Type
Operating Temperature	−10°C to 50°C (derate above 40°C)
Approvals	UL, CE, RCM

Single-Phase Input — Motor and Supply Requirements

The drive outputs three-phase PWM regardless of input type. The connected motor must be a three-phase induction motor; connecting a single-phase motor to the output will damage it. At 120V three-phase output, verify the motor's nameplate — it must be rated for operation at this voltage level, typically a motor wound for 120V three-phase or a 208/230V motor that's acceptable at reduced voltage.

Input current from the 120V supply is considerably higher than the motor's rated current suggests. The DC bus inrush on startup and the asymmetric charging current in steady-state operation mean the input circuit should be a dedicated 15–20A branch circuit. A 15A circuit shared with other loads will trip on drive startup or under heavy load. If the existing circuit is 15A and marginal, upgrade to 20A before installing the drive.

Standalone Wiring for Simple Applications

For machines without a PLC, the six digital inputs and two analog inputs handle most small machine control requirements without any network connection at all. A minimal standalone configuration:

Input 1 (Run Forward): maintained contact from a selector switch or relay
Input 6 (Stop): normally closed contact from a stop pushbutton or safety device
Analog Input 1 (Speed Reference): 0–10V from a potentiometer or process controller
Relay Output: configured as "At Speed" confirmation to a PLC input or indicator

STO terminals (S1, S2, +24V) should still be wired to a safety relay contact even in standalone installations. Jumping the STO terminals together disables the safety function entirely and removes the Category 3 / PLd protection — it should not be done as a convenience measure.

FAQ

Q: Can this drive run from a 240V single-phase supply?

No. The 25C-A series is rated for 100–120V single-phase input only. For 200–240V single-phase, the 25B-B or 25C-B variants are required.

Q: How is the IP address set?

Default is BOOTP. Use the HIM keypad to navigate to the network parameters and set a static IP, or connect to a network with a BOOTP server. Static addressing is recommended for production systems to prevent address reassignment.

Q: Is sensorless vector always better than V/Hz at this power level?

Not always. For centrifugal pumps and fans, V/Hz is sufficient and requires no autotune. SVC improves low-speed torque and speed regulation under varying loads — worth enabling for conveyors, mixers, or any load that needs consistent speed below 20 Hz or under changing load. It requires a static autotune first.

Q: What does the option port add?

The secondary option port accepts plug-in peripheral modules: an encoder feedback card for closed-loop vector control, an expanded I/O module for additional digital or analog points, or a second communication card for a different network protocol. It's an upgrade path, not a current necessity.

25C-A4P8N104 AC Drive 0.75kW 1Hp New Sealed 25CA4P8N104