What This Breaker Delivers
The Siemens 3VA1112-5EE36-0AC0 is a 3-pole IEC frame 160 molded case circuit breaker with a 55 kA interrupting capacity at 415 V — that is the class M rating, meaning it clears high fault currents without cascading to upstream gear. Rated In=125 A with a thermal-magnetic TM220 trip unit, the overload protection is adjustable Ir=88…125 A and the instantaneous magnetic pickup is fixed at Ii=10 × In (1250 A). Two built-in changeover auxiliary switches are included for status feedback to a PLC or panel indicator.
Where It Fits in the Panel
Rated for 3-pole line protection in distribution boards, motor control centers, and industrial switchgear. The clamp connection terminals accept copper or aluminum conductors — no lug kit needed for most panel builds. The frame 160 footprint is standard across the 3VA1 family, so busbar connections and mounting hardware are consistent if you are coordinating upstream and downstream breakers.