40 A line-protection MCCB with undervoltage release
Breaking capacity across voltage levels
Breaking capacity is rated at 75.6 kA at 240 V AC, 52.5 kA at 415 V, 32 kA at 440 V, and 11.9 kA at both 500 V and 690 V.
Current derating and thermal limits
Rated current holds at 40 A from 40 °C through 50 °C, then derates to 39 A at 55 °C and 60 °C, 38 A at 65 °C, and 37 A at 70 °C. Maximum power loss is 13.3 W. Panel builders should account for the derating curve when locating the breaker near heat sources or in high-ambient enclosures.
Physical fit and mounting
Dimensions are 130 mm height, 76.2 mm width, 70 mm depth — a standard 3-pole MCCB footprint that fits most SENTRON panelboards and third-party enclosures with the appropriate bus adapter. No trip indicator or voltage trigger is fitted on this variant.