It carries a 1250 A rated current at 50 °C and an 85 kA Icu breaking capacity at 240 V AC, with 50 kA Icu at 415 V AC. The MicroLogic 5.0 electronic trip unit provides L (long-time overload), S (short-time short-circuit), and I (instantaneous short-circuit) protection curves. This is a 4-pole, fixed-mount, manually operated unit designed for distribution applications per EN/IEC 60947-2. Mounted on a backplate, front-connected both sides, it occupies 280 mm width by 327 mm height by 147 mm depth.
Fixed-mount on a backplate — this breaker bolts to a panel, not a DIN rail. Front connection on both upside and downside simplifies bus-bar or cable routing in a switchboard. The 70 mm connection pitch matches standard bus-bar spacing for this frame size. IK07 impact resistance handles light mechanical shock. The 44 W power loss at rated current matters for thermal management in a sealed enclosure — factor it into your cooling budget.
Durability and protection features
Mechanical durability is 10,000 cycles; electrical durability ranges from 2,000 cycles at 690 V In to 5,000 cycles at 440 V In/2. For a main breaker that cycles infrequently, this is ample. The MicroLogic 5.0 trip unit includes a 20-minute thermal memory — after a trip, the thermal model retains the heat history so re-closing into a still-hot load does not reset the protection curve, preventing nuisance trips on repeated overloads. Local signalling uses 4 red LEDs for fault indication and 1 yellow LED for overload. No earth-leakage protection built in; if you need ground-fault, you add an external Vigi module or specify a different trip unit.