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Siemens Auxiliary ContactSwitch for SIRIUS 3RV1, Transverse and Lateral Siemens 3RV1901 1A, The Siemens SIRIUS 3RV1 Circuit Breakers also known as MSP's Motor Starter Protectors have three main contact elements. In order to achieve maximum flexibility, auxiliary switches can be supplied separately. These components can be fitted as required on the switches without using tools.This Lateral Auxiliary Contact Block 3RV1901 1A order code 55 7179 is a side mounted auxiliary contact with 1 NO and 1 NC contacts. The contacts of the auxiliary switch close and open together with the main contacts of the Circuit Breaker MSP. The overall width of the lateral auxiliary switch with 2 contacts is 9mm. Siemens 3RV1901 1A Auxiliary ContactSwitch for SIRIUS 3RV1
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