The SIEMENS 3RT2936-1BD00 is a surge suppressor varistor designed for use with 3RT2.3 and 3RT2.4 contactors to protect control circuits from voltage spikes. It accepts AC operation from 127–240 V at 50/60 Hz and DC operation from 150–250 V, clamping transient overvoltages that can damage coils and sensitive components. Easy to install in contactor assemblies, it helps prolong equipment life and reduce downtime by absorbing surges before they reach the control coil. Use this varistor where routine switching or external transients pose a risk to contactor reliability.
