Spec at a glance
The Siemens 3VA1150-6EF32-0JA0 is a 3-pole IEC frame 160 molded-case circuit breaker with class H breaking capacity — Icu rated 70 kA at 415 V AC. The TM240 thermal-magnetic trip unit gives adjustable overload protection (Ir = 35…50 A) and fixed short-circuit pickup (Ii = 5…10 × In). On a 50 A frame, that puts instantaneous trip between 250 A and 500 A — wide enough to ride through motor inrush on a moderate load, tight enough to clear a bolted fault before the upstream device sees it.
Trip unit and accessories
Factory-fitted shunt trip (STL) operates on 110–127 V AC/DC, 50/60 Hz. The nut keeper kit (included) secures the breaker in the panel; no separate ordering step for the mounting hardware.