Skip to main content
Log in
Siemens 3RA1125-1BA23-1AM2 — Motor Starters

Siemens 3RA1125-1BA23-1AM2 Combination Starter, S0, 1.4-2A

MPN3RA1125-1BA23-1AM2

Siemens SIRIUS 3RA1125-1BA23-1AM2, nonreversing combination starter, IEC, DIN/panel mount, frame size S0, 1.4-2 A, 240 VAC control voltage, with MSP aux and contactor aux.

Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Product details

The Siemens 3RA1125-1BA23-1AM2 is a nonreversing combination starter in the SIRIUS family, frame size S0, rated for 1.4-2 A with a 240 VAC control voltage. It integrates a motor protection switch (MSP) and a contactor into one DIN-rail or panel-mount unit, so a single device handles both overload protection and switching for a motor branch circuit. The 1.4-2 A thermal setting matches small motor loads — fractional-horsepower pumps, fans, or conveyors — where you need coordinated protection in a compact footprint. The UL file E156943 listed in Vol.1 Sec.14 confirms it is accepted for North American panel builds, not just IEC markets.

Auxiliary contact configuration and wiring note

This variant ships with an MSP auxiliary contact (1 SPDT NO/NC) and a contactor auxiliary (1 NO) mounted on the front. Both aux contacts are factory-installed and front-accessible, so you are not adding blocks in the field — they are already there when the starter lands on the DIN rail.

Frequently asked questions

What are the specifications of 3RA1125-1BA23-1AM2?

It is a nonreversing combination starter, IEC-rated, DIN or panel mount, SIRIUS frame size S0, with a thermal setting of 1.4-2 A and a 240 VAC control voltage. It includes one MSP auxiliary contact (SPDT NO/NC) and one contactor auxiliary (NO) mounted on the front. UL file E156943 in Vol.1 Sec.14 covers North American approvals.

What is the difference between 3RA1125 and 3RA1126?

The 3RA1125 series is a nonreversing combination starter; the 3RA1126 series is a reversing combination starter. The reversing variant includes a mechanical interlock between two contactors to prevent simultaneous closure, which the nonreversing 3RA1125 does not require.

What accessories are compatible with 3RA1125-1BA23-1AM2?

As a SIRIUS S0 frame combination starter, it accepts standard S0 accessories such as auxiliary contact blocks, surge suppressors, and busbar systems designed for the S0 footprint. The front-mounted aux contacts are already populated on this variant.

MPN
3RA1125-1BA23-1AM2