What this 250 A MCCB carries
Interrupting capacity hits 220 kA at 240 V, 154 kA at 415 V, 75.6 kA at 440 V, 30 kA at 500 V, and 17 kA at 690 V. That's a lot of fault-clearing headroom for a 250 A frame; it's sized for high-available-fault-current panels where a standard 65 kA MCCB wouldn't hold coordination. Thermal derating is published per degree: holds 250 A flat through 50 °C, then drops to 243 A at 55 °C, 237 A at 60 °C, 230 A at 65 °C, and 223 A at 70 °C.
Line protection build and auxiliary content
This variant is designated line protection, meaning it's set up for feeder or main breaker duty, not motor branch circuit. The UVR drops the breaker on loss of control voltage, which is typical for emergency-stop or undervoltage protection schemes. Dimensions: 158 mm high, 140 mm wide, 70 mm deep — standard 4-pole MCCB footprint for Siemens SENTRON 3VA1 panelboards.