What this 250 A MCCB carries — and where the rating matters
Breaking capacity is 121 kA at 240 V, 75.6 kA at 415 V, 25 kA at 440 V, and 11.9 kA at 690 V — so the available fault current at the panelboard determines which voltage column governs the install.
Above that, derating is linear: 243.3 A at 55 °C, 236.5 A at 60 °C, 229 A at 65 °C, and 223 A at 70 °C.
The UVR coil drops the breaker on loss of control voltage — standard for emergency-stop or undervoltage protection schemes.
Dimensions: 158 mm height, 140 mm width, 70 mm depth. The 4-pole footprint matches standard SENTRON 3VA frame spacing; verify busbar or lug kit compatibility with the existing distribution board.
N-conductor protection and mechanical endurance
N-conductor protection is rated at 100% — full-rated neutral pole, not reduced. Mechanical endurance is 15 000 operations, which suits frequent switching applications like capacitor bank or lighting control, not just infrequent fault protection.