The Siemens 3VA1216-4EF32-0HG0 is a 3-pole IEC molded-case circuit breaker in the 3VA1 series, frame size 250, with a breaking capacity class S rated at Icu=36kA @ 415V. It is configured for line protection with a TM240 thermal-magnetic trip unit, adjustable overload protection Ir from 112A to 160A, and short-circuit protection Ii set at 5 to 10 times In (In=160A). The breaker includes a shunt trip (STL) coil rated for 12-30V DC or 24V AC 50/60Hz, plus one auxiliary switch HP and one trip alarm switch HP. A nut keeper kit is also part of the assembly.
The adjustable overload range (Ir=112A...160A) lets you match the thermal trip to the actual continuous load, reducing nuisance tripping on lightly loaded feeders. The shunt trip (STL) operates on a separate control voltage (12-30V DC or 24V AC), enabling remote or emergency-off tripping without depending on the main circuit voltage.
Panel Integration & Wiring
The nut keeper kit simplifies torqueing of the line/load lugs during panel assembly — no loose hardware to drop into live gear.