SIRIUS 3RV2311-0BC20 — Motor Starter Protector, Size S00
Its headline rating is a 100 kA breaking capacity at 400 V AC, which means it can safely interrupt a fault current up to 100,000 amps without welding contacts or cascading failure upstream in the panel. That level of SCCR (short-circuit current rating) covers most industrial distribution systems straight off the transformer. Rated for AC-3 duty up to 690 V, this protector handles the switching of motor loads — starting and stopping under load — with a typical mechanical life of 100,000 operations on the main contacts. The 100 kA rating holds at 240 V, 400 V, 500 V, and 690 V AC, so you get consistent fault-clearing performance across common supply voltages without derating the interrupting capacity.
The S00 footprint is 45 mm wide, 106 mm tall, 97 mm deep — a compact single-module width that leaves room for adjacent contactors or auxiliaries in a motor control center row. Spring-loaded terminals on the main circuit accept 2 x (0.5 to 4 mm²) solid or stranded wire; no lug torqueing needed, just strip and push. That lets you pack units tightly in a shallow enclosure as long as you respect the vertical ventilation gap.