Siemens 3RA1125-1FA23-1BB4 Combination Starter

Siemens 3RA1125-1FA23-1BB4 is a SIRIUS combination starter that merges motor-contactor switching with thermal overload protection into a compact, panel-mount unit, purpose-built for streamlined, centralized motor control in industrial automation environments where space and reliability matter. This starter is driven by a 24 V DC control coil and switches a load circuit rated for 480 VAC, with a continuous motor current range of 3.5–5.0 A, enabling dependable start-up sequencing and motor protection for small-to-medium three-phase motors. By consolidating overload protection and switching into a single enclosure, the device reduces wiring complexity, shortens installation times, and simplifies maintenance, making it well-suited to panel builders and retrofits that require a compact, all-in-one solution. The unit is cataloged under NE number 130299, providing a consistent reference point for replacement parts and compatibility within Siemens' North American product literature.