The MGP1002L31 is a Schneider Electric PowerPacT 4 molded case circuit breaker, 2-pole configuration, rated 100 A at 40 °C with a thermal-magnetic TM-D trip unit providing LI protection (overload thermal + short-circuit magnetic). It carries a 25 kA Icu and matching 25 kA Ics at 415 V AC 50/60 Hz — the service breaking capacity equals the ultimate, so the breaker can reclose after clearing a fault at its full rating without derating. This is a Category A breaker per BS EN 60947-2, meaning it has no intentional short-time delay and is intended for distribution feeder duty, not motor-starting coordination. Panel-mounted via backplate support, accepts horizontal or vertical orientation. Two-module 35 mm footprint per pole. Rated insulation voltage 750 V, impulse withstand 8 kV — adequate for 415 V distribution panels where transient overvoltages are a concern. No earth-leakage protection integrated; this is a straight overcurrent device.
The MGP1002L31 is listed as obsolete. If you're holding a last-time-buy or need to fill an existing panel design, this is a part to secure on the next buy rather than assume indefinite supply.
Control type is toggle — manual on-off operation, no rotary handle or motor operator. Electrical durability rated at 20,000 cycles at 277 V at full rated current, 10,000 cycles at 277 V at twice rated current. Mechanical durability 20,000 cycles.