150-F85NBD — SMC Flex Smart Motor Controller, 85A, 200–480V Three-Phase

The 150-F85NBD is a solid-state soft starter from the SMC Flex family, rated at 85A continuous for three-phase line-connected motors across a 200–480V AC input range, with 100–240V AC control power. It includes electronic overload protection with programmable trip characteristics, built-in short-circuit and thermal protection, jam and stall detection, and DPI-based communication for parameter access and network connectivity through an optional adapter.

Specifications

Parameter	Value
Part Number	150-F85NBD
Series	SMC Flex
Rated Current	85 A
Input Line Voltage	200–480V AC, Three-Phase, 50/60 Hz
Control Voltage	100–240V AC
Motor Power (line-connected, 460V)	Up to 25 HP
Motor Power (delta-connected, 460V)	Up to 40 HP
Protection	Programmable electronic overload, short-circuit, thermal
Jam/Stall Detection	Yes
Communication	DPI (built-in); EtherNet/IP and others via optional adapter
Enclosure	Open Type
Operating Temperature	−5°C to 50°C

Soft Starting at 85A — Sizing for the Right Motor

The rated current alone doesn't fully define which motor this soft starter fits — the connection scheme matters. Wired for a line-connected motor, the 85A frame covers up to roughly 25 HP at 460V; wired for a delta-connected motor configuration, the same frame covers up to roughly 40 HP at 460V. Confirming which wiring configuration the application calls for, and sizing against the motor's actual full-load amps within the controller's rated current window, is the first step before specifying — undersizing leads to nuisance trips or inadequate overload protection, while oversizing wastes capability without functional benefit.

Jam and stall detection adds a layer of protection beyond standard thermal overload — a mechanically jammed load or a stalled motor under load draws current in a pattern that simple thermal overload monitoring can be slow to catch, while dedicated jam/stall logic identifies the condition faster and can shut the motor down before sustained high current causes damage to the motor or driven equipment.

FAQ

Q: Does the 150-F85NBD include bypass contacts for after the starting ramp completes?

Integrated bypass is a configurable feature on SMC Flex controllers in this current range — verify the specific catalog configuration ordered, since bypass contacts reduce heat dissipation during run mode by carrying load current outside the solid-state switching path once the motor is up to speed.

Q: Can this controller communicate over EtherNet/IP?

Not natively through its built-in DPI port alone — an EtherNet/IP communication adapter installed in the controller's DPI interface adds that network capability.

Q: Is a separate power supply needed for the cooling fan?

For controllers with 24V AC/DC control power, a separate 120V or 240V single-phase supply is required specifically for fan operation — this is distinct from the 100–240V AC control power rating on this particular model.

Q: What's the difference between using this in Full Voltage starting mode versus a ramped soft-start mode?

Full Voltage mode applies near-instantaneous full voltage rather than a ramped start — appropriate only for loads with limited starting current demand. For higher starting current loads (above roughly ten times motor FLA), a ramped soft-start profile is the appropriate mode to avoid excessive inrush stress.

150-F85NBD New Original 150F85NBD Flex Smart Motor Controller