The ABB PST175 1SFA895011R7000 is a softstarter rated 175 A in-line connection, which means it directly switches motor loads up to that current — enough for a 90 kW motor at 400 V. The 400-690 V AC main circuit voltage covers standard European and North American three-phase supplies without needing a transformer tap. Built-in electronic overload protection eliminates the need for a separate overload relay, saving panel space and wiring time. The ramp time adjusts from 0 to 120 seconds, letting you tune the acceleration to match pump, fan, or conveyor loads — soft enough to avoid water hammer, fast enough for quick starts. Inside-delta connection bumps the rated current to 300 A and power to 160 kW at 400 V, useful for retrofit into existing delta-wound motor circuits where the softstarter sits inside the delta loop, reducing line current draw.
Control and integration details
Control supply voltage accepts 100-250 V AC, while the control circuit runs on 24 V DC — standard for PLC-driven panels. The unit includes run, fault, by-pass, and overload signal relays, so you can wire status back to the controller without adding interface modules. Communication is via a standard FieldBusPlug, meaning you can snap in a PROFIBUS or DeviceNet connector module (sold separately) without opening the housing. Analog output 0-10 V provides a speed-follower signal for drives or chart recorders. Main circuit terminals are bars with a 10.2 mm hole — expect to use ring lugs or busbars, not wire ferrules. Control circuit wiring accepts 1 x 2.5 mm² rigid, torqued to 0.5 N·m. Ambient operating range 0-50 °C; no derating curve needed at typical panel temperatures.
For BOM planning: this is the standard PST175 model, not the PST175B variant. If your line is spec'd to the PST175, this order code is the direct fit.