What this MCCB carries — and where the number matters
The Siemens SENTRON 3VA2225-5JQ32-0BL0 is a 3-pole molded case circuit breaker rated for line protection, with a full-scale current of 250 A and a maximum breaking capacity of 2 500 A. The interrupting ratings climb with voltage: 187 kA at 240 V, 121 kA at both 415 V and 440 V, 75.6 kA at 500 V, and 4.5 kA at 690 V. That spread tells you the real SCCR your panel sees depends on the system voltage — at 690 V the fault-clearing drops to 4.5 kA, so verify coordination upstream if you're running a 690 V bus. Thermal derating is baked into the spec: at 40 °C through 50 °C it holds the full 250 A, then steps down — 238 A at 55 °C, 225 A at 60 °C, 213 A at 65 °C, 200 A at 70 °C. If your panel runs hot (say 55 °C inside the enclosure), the breaker's effective rating is 238 A, not 250 A. That matters for a BOM line where every amp counts. It ships with an undervoltage release (UVR) and a full auxiliary-switch complement: two auxiliary switches, one trip alarm switch, and one electrical alarm switch (HQ type). The basic switch variant is 3VA2225-5JQ32-0AA0, so if you're cross-referencing a panel that specified the -0AA0 base, this -0BL0 adds the UVR and the expanded signaling stack.
Sourcing and lifecycle — current production, quoted to order
The SENTRON 3VA platform includes communication capability (the -0BL0 suffix carries that), so if your panel uses a bus system for breaker status or remote trip, this variant supports it. The undervoltage release is fitted from the factory — no field-kit install needed.
Panel fit — dimensions and integration
Footprint: 105 mm wide, 181 mm tall, 86 mm deep. That 86 mm depth (3.39 in) is the dimension that usually bites you on a shallow enclosure backpan — measure your gland-plate clearance before you cut the hole. The width is a standard 105 mm for this frame class, so it drops into a 3-pole SENTRON 3VA cutout without panel rework. Operating temperature range is -25 °C to 70 °C; storage range -40 °C to 80 °C. Max power loss at full load is 50.5 W — that's the heat you have to vent in a sealed enclosure. If you're stacking multiple breakers in a tight cabinet, the cumulative dissipation drives the fan or heatsink spec.