The Siemens 3RV1901-1BA00-0FQ0 is an auxiliary switch with 2 normally open (NO) contacts, designed for lateral mounting on circuit-breakers in the S00 through S3 frame sizes. It provides remote status indication — open or closed — from the breaker's main contacts, which is essential for a control system to know whether the motor or load circuit is actually energized. The lateral mount keeps the switch within the breaker's footprint, so it doesn't eat up extra DIN-rail space in a crowded panel.
Siemens 3RV1901-1BA00-0FQ0 Auxiliary Switch, 2 NO, Lateral M
MPN3RV1901-1BA00-0FQ0
Siemens 3RV1901-1BA00-0FQ0, auxiliary switch, lateral mounting, 2 NO contacts, for circuit-breaker sizes S00...S3.
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026
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Frequently asked questions
Where can I buy the 3RV1901-1BA00-0FQ0?
This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time.
What is the 3RV1901-1BA00-0FQ0 used for?
It is an auxiliary switch with 2 NO contacts that mounts laterally on Siemens circuit-breakers in sizes S00 through S3, providing remote indication of the breaker's main contact position.
MPN
3RV1901-1BA00-0FQ0