
SIEMENS 3RH1921-1FA31 AUXILIARY SWITCH BLOCK New
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The Siemens 3RH1921-1FA31 auxiliary switch block extends contactor signaling with reliable, high-quality performance for industrial control panels, machine builders, and process automation. Engineered for seamless integration in Siemens SIRIUS control gear, it delivers dependable status feedback for interlocks, PLC inputs, and monitoring functions, helping maintain clear diagnostics and safe control logic in your power and automation systems.
Featuring a 1 NO + 1 NC (2-pole) contact set, this auxiliary contact block provides precise, durable mechanical switching for control and feedback tasks. The front snap-on design enables rapid, tool-friendly installation on compatible contactors, minimizing panel assembly time while ensuring a secure fit. Built for robust service in MCCs and control cabinets, it supports consistent operation across a wide range of industrial environments.
Ideal for standardizing new builds or retrofitting existing installations, the 3RH1921-1FA31 helps streamline wiring, documentation, and maintenance, and it supports long-term reliability as part of the Siemens SIRIUS ecosystem, complemented by a 1-year warranty to protect your investment during commissioning and operation.
- Brand: Siemens
- Series: SIRIUS
- Model: 3RH1921-1FA31
- Contact configuration: 1 NO + 1 NC (2-pole)
- Mounting: Front snap-on on contactor
- Compatibility: Siemens SIRIUS contactors
- Function: Auxiliary switch block