Siemens SENTRON 3VA2325-5HL32-0KA0 — 250 A MCCB with Shunt Trip
The Siemens SENTRON 3VA2325-5HL32-0KA0 is a 3-pole molded case circuit breaker rated for 250 A continuous current across the full ambient range from 40 °C to 70 °C — no derating needed up to that ceiling. Per the datasheet, the interrupting capacity reaches 187 kA at 240 V and 121 kA at 415 V, which gives selectivity headroom for high-fault panelboards. The integrated shunt trip release (STL) allows remote tripping, so this breaker fits into emergency-stop or load-shedding circuits where a separate undervoltage release is not specified.
Breaking Capacity and Coordination
At 240 V the 3VA2325-5HL32-0KA0 delivers 187 kA breaking capacity; at 415 V and 440 V it holds 121 kA, then drops to 75.6 kA at 500 V and 7.5 kA at 690 V. For a 250 A frame, those numbers mean the breaker can clear a bolted fault on the secondary side of a typical 500 kVA transformer without upstream fuses needing to open. The minimum breaking capacity is 375 A — below that threshold the internal arc may not extinguish reliably, so the breaker should not be applied on circuits where prospective fault current falls under that floor.
Physical Fit and Panel Integration
Dimensions are 248 mm high, 138 mm wide, and 110 mm deep. The 138 mm width is standard for a 3-pole MCCB in this frame class, so it fits existing SENTRON mounting bases and busbar systems without adapters. Maximum power loss is 37.5 W — within tolerance for a ventilated enclosure; for sealed cabinets, check the internal temperature rise against the 70 °C operating maximum.