The Siemens 3VA2612-6JP42-0AA0 is a SENTRON molded case circuit breaker sized for 1250 A continuous current (Iu) across four poles, with an H-class interrupting capacity that hits 242 kA at 240 V and 187 kA at 415 V. That SCCR headroom means it can sit at the main or a high-fault feeder without cascading upstream — the H rating is the top switching-capacity class in the 3VA platform, so it handles the worst-case bolted-fault at the service entrance. The ETU550 electronic trip unit provides LSI protection (long-time, short-time, instantaneous), with the instantaneous pickup adjustable from 1875 A to 12 500 A.
Sizing and panel fit
The 3VA2612-6JP42-0AA0 measures 320 mm high by 280 mm wide by 120 mm deep. That depth is shallow enough to clear a standard 400 mm enclosure backplate without a gland-plate extension, but the 280 mm width means it needs a full-width mounting position — no squeezing it into a narrow sub-panel slot. Four-pole construction with a fixed (non-plug-in) front connection; the neutral conductor protection is adjustable from OFF to 20%–100% of the phase rating. No auxiliary contact blocks are fitted from the factory (0 CO contacts), so if you need status feedback to a PLC, plan to add the optional side-mount aux switch kit.
Thermal and environmental limits
The ETU550 is a microprocessor-based trip unit, so its accuracy holds across the temperature band, but the thermal memory in the long-time element still responds to the actual conductor temperature.
Communication and monitoring
The 3VA2612-6JP42-0AA0 includes a communication function (the ETU550 supports the SENTRON 3VA communication module for PROFIBUS, PROFINET, or Modbus TCP). That lets the MCCB report trip events, load current, and power quality data to a higher-level control system — useful for predictive maintenance and energy monitoring on a large feeder.