Siemens 3RA1125-1FA23-1BB4 Combination Starter

Siemens 3RA1125-1FA23-1BB4 Combination Starter is a SIRIUS motor starter that combines overload protection with a contactor in one compact unit for panel‑mounted motor control. Designed to handle motors in the 3.5 to 5.0 A range, it is rated for line voltages up to 480 VAC while using a 24 VDC control coil for remote start/stop operation. The unit carries the NE reference 311926, identifying this exact configuration within Siemens' SIRIUS family. By integrating switching and protection, this combination starter reduces wiring complexity and panel space, making it suitable for applications such as pumps, conveyors, fans, and other single‑motor drives in industrial automation that require reliable overload protection alongside straightforward control signals. For panel builders already using Siemens SIRIUS components, this integrated starter simplifies ordering and field installation by pairing protection with switching in a single module.