The Siemens 3VA2116-5HN36-0DH0 is a 3-pole IEC molded-case circuit breaker in the 3VA2 frame, rated 160 A continuous with an Icu of 55 kA at 415 V AC — that is the breaking capacity class M, meaning it safely interrupts faults up to that level without upstream cascading, sized for main or heavy feeder protection in industrial panels.
Protection and trip unit
Fitted with an ETU350 electronic trip unit offering LSI protection: long-time pickup Ir adjustable from 63 A to 160 A, short-time pickup Isd from 1.5 to 10 x Ir, and instantaneous pickup Ii fixed at 10 x In. That gives you selective coordination flexibility — set Isd high enough to ride through downstream faults, or tighten it for close-coupled protection on sensitive loads. The undervoltage release (UVR) operates on 208-230 V AC 50/60 Hz, so the breaker trips automatically when control voltage drops — standard for emergency-stop or safety-shutdown circuits where loss of pilot power must open the main contacts.
Auxiliary and signaling
Two HQ auxiliary switches and one HQ trip alarm switch are built in — the HQ designation indicates high-quantity contacts (typically 2 N.O. + 2 N.C. per switch), giving you status feedback for remote monitoring and a dedicated alarm contact that changes state only on a trip event, not on manual open.