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Siemens 3RA1215-0KA15-1BB4 — Motor Starters

Siemens 3RA1215-0KA15-1BB4 Reversing Starter, S00, 0.9-1.25A

MPN3RA1215-0KA15-1BB4

Siemens SIRIUS 3RA1215-0KA15-1BB4, combination reversing starter, IEC, DIN/panel mount, frame size S00, 0.9-1.25 A, 110 VDC control voltage, MSP auxiliary 1 SPDT NO/NC, contactor auxiliary 2 NO.

Source DocumentedChannel stated on listing & quote
Condition PhotosReal unit photos / video on request
WhatsApp AnswersFast human replies for machine-down parts
Worldwide DispatchDHL/FedEx — transit quoted per order
Independent China distributor & sourcing agent· Listing updated Sep 2026

Product details

The Siemens 3RA1215-0KA15-1BB4 is a combination reversing starter in the SIRIUS family, frame size S00. It integrates a reversing contactor pair, overload relay, and auxiliary contacts into one DIN-rail or panel-mount unit. Rated for 0.9-1.25 A with a 110 VDC control voltage, it handles reversing motor loads — conveyors, hoists, or any application needing forward/reverse switching — within that current band. The built-in MSP auxiliary provides one SPDT NO/NC contact, and the contactor auxiliary adds a second NO contact for status feedback or interlocking.

Frame size and integration

At 0.9-1.25 A, it fits light-duty reversing applications where panel space is tight — think small conveyors, gate operators, or pump direction control. The 110 VDC coil matches control systems using DC supplies; verify the coil suppression polarity when wiring inductive loads.

Frequently asked questions

What is the frame size of the 3RA1215-0KA15-1BB4?

Frame size S00 — the smallest SIRIUS frame, designed for compact DIN-rail or panel-mount installations.

What are the specifications of the 3RA1215-0KA15-1BB4?

It is a combination reversing starter rated 0.9-1.25 A with a 110 VDC control voltage. It includes an MSP auxiliary with one SPDT NO/NC contact and a contactor auxiliary with one NO contact.

What is the difference between a reversing and non-reversing starter?

A reversing starter contains two contactors (one for forward, one for reverse) mechanically and electrically interlocked so both cannot close simultaneously. A non-reversing starter uses a single contactor for one direction only. The 3RA1215-0KA15-1BB4 is a reversing starter, so it can switch motor direction without external interlocking.

How to wire the 3RA1215-0KA15-1BB4 reversing starter?

Wire the 110 VDC control voltage to the coil terminals. Connect the motor to the load side of the reversing contactor pair. The MSP auxiliary (1 SPDT NO/NC) and contactor auxiliary (1 NO) provide feedback or interlock signals. Follow the wiring diagram on the unit label for the specific terminal assignments.

MPN
3RA1215-0KA15-1BB4