Motor protection MCCB with 250 A continuous rating and 330 kA interrupting capacity
Breaking capacity reaches 330 kA at 240 V, 242 kA at 415/440 V, and 187 kA at 500 V, dropping to 7.5 kA at 690 V — figures that cover most industrial distribution panels with high fault-current potential. The 250 A frame size and the motor-protection trip curve (thermal-magnetic or electronic, depending on the internal trip unit) mean this breaker coordinates with downstream contactors and overload relays in a motor control center.
Sourcing and lifecycle — current production, available to order
The undervoltage release (UVR) and phase failure detection are factory-integrated, so no separate add-on modules are needed for those functions.
Integration notes — panel fit and auxiliary wiring
Mounts in a standard SENTRON panelboard or on a mounting plate via the 248 mm × 138 mm footprint. The 110 mm depth leaves clearance for rear-connected bus bars or cable lugs. The two HQ auxiliary switches (form C contacts) are pre-wired to a terminal block — wire them to a PLC digital input for open/closed status, or to an alarm circuit for remote indication. Phase failure detection is internal — no external phase-loss relay needed. Maximum power loss is 40 W at full rated current — account for this heat in enclosed panel thermal calculations.