The 3RV2901-1F is a front-mounted (transverse) auxiliary switch from Siemens' SIRIUS 3RV29 series, designed to add signaling contacts to a compatible 3RV2 circuit breaker for motor protection. It attaches via plug-in fixing directly onto the front of Size S00, S0, S2, or S3 motor circuit breakers, letting you monitor the breaker's switch position without adding a separate device to the panel or using up side-mount space. This makes it a simple way to integrate breaker status into a PLC, pilot light, or interlock circuit. Electrically, the 3RV2901-1F provides two normally open auxiliary contacts, rated for at insulation voltage, suited to AC-12 control circuits. This contact configuration lets you signal the breaker's ON state to two separate pieces of control or monitoring equipment simultaneously, or use it as part of a redundant signaling scheme. Mechanically, the 3RV2901-1F uses a plug-in fixing to attach to the front of the host circuit breaker and screw-type terminals for wiring, without requiring separate mounting hardware or side panel space. Its compatibility across Size S00 through S3 breakers means you can standardize on the same auxiliary switch block across your entire 3RV2 motor protector lineup. Purchase the 3RV2901-1F at Electrical.com, your reliable partner for industrial and commercial electrical products. Our selection includes trusted circuit breakers and motor control products from manufacturers like Siemens, Eaton, Cutler-Hammer, and Schneider Electric, backed by a knowledgeable sales team ready to assist with technical questions, product selection, and support.