The Siemens 3VA2510-5HN42-0BH0 is a 4-pole IEC molded-case circuit breaker on the 3VA2 frame, rated 1000 A continuous with a 55 kA interrupting capacity at 415 V (breaking capacity class M). It carries the ETU350 electronic trip unit configured for LSI protection — long-time, short-time, and instantaneous — with an adjustable overload pickup Ir from 400 A to 1000 A and short-time pickup Isd from 1.5 to 10 × Ir. The instantaneous pickup Ii is fixed at 10 × In. Neutral protection is field-adjustable (OFF, 50%, 100%). The unit ships with an integrated undervoltage release (24 V DC) and space for up to two auxiliary switches.
Deployment context
This is a fixed-mount MCCB designed for panel integration — it bolts directly to a mounting plate or busbar system, not a DIN-rail snap-on. The 4-pole configuration suits three-phase plus neutral feeders in main distribution boards or large sub-distribution panels. The 1000 A frame and 55 kA interrupting rating place it in the main or tie-breaker position of an industrial switchboard, not a branch circuit.