Siemens 3RT1926-1BC00 Three-Phase AC Contactor

Siemens 3RT1926-1BC00 is a varistor-based surge suppressor designed to mount onto Siemens Sirius contactors in the 3RT2 family (size S0) to protect the coil terminals from inductive voltage spikes. It supports control voltages of 48–127 V AC (50/60 Hz) and 70–150 V DC, delivering transient clamping that helps extend coil life and reduce nuisance trips. Used with common 3RT2 contactors in motor control panels—such as 3RT1023 through 3RT1046—the accessory attaches directly to the coil terminals as part of the Sirius surge protection lineup. This 3RT1926-1BC00 varistor is specifically designed for mounting on contactors of size S0, delivering compact, integrated protection within the Sirius systems.