The Siemens SENTRON 3VA2510-5JP42-0AA0 is a 4-pole molded case circuit breaker (MCCB) rated for 1000 A continuous current at 40 °C, with no derating needed up to 55 °C — it holds the full 1000 A through that range, then steps down to 955 A at 60 °C and 815 A at 70 °C. That thermal profile means it handles full-rated load in most ventilated enclosures without forced cooling. The ETU550 electronic trip unit gives adjustable long-time, short-time, and instantaneous protection, plus ground-fault detection is not built in (this version ships without). Breaking capacity hits 187 kA at 240 V, 121 kA at 415/440 V, and still clears 52.5 kA at 690 V — enough for high-fault utility feeds or transformer secondaries.
Sizing and deployment
At 280 mm wide × 320 mm tall × 120 mm deep, this breaker is a panel-mount unit — it bolts into a switchboard or distribution panel via the rear mounting plate, not a DIN rail. Communication function is present via the COM module slot for BMS or SCADA reporting.