Siemens 3RV1901-1F Transverse Auxiliary Switch - 2 NO Contacts

The Siemens 3RV1901-1F is a transverse auxiliary switch designed for use with Siemens circuit breakers of sizes S00 through S3. This accessory provides additional control and signaling capabilities, featuring two normally open (NO) contacts with screw terminals for secure connections. It is an essential component for expanding the functionality of motor starters and protection devices.

This auxiliary switch is typically used in control circuits for signaling the status of a circuit breaker (e.g., tripped or closed) or for interlocking functions within a larger control system. It finds applications in motor control panels, switchgear, and various industrial automation setups where reliable status feedback is critical.

Stanlo Automation, a veteran-owned company specializing in surplus industrial parts, offers the Siemens 3RV1901-1F. While this product is phased out, we can help you source this part or its preferred successor, the 3RV2901-1F, to ensure your automation systems remain operational.