The MGP0632L1N is a 1-pole-plus-neutral molded case circuit breaker from the PowerPacT 4 range, rated 63 A at 40 °C with a TM-D thermal-magnetic trip unit providing LI (overload and short-circuit) protection. It is designed for distribution in single-phase 230 V AC circuits (-N) and carries a 25 kA Icu and Ics at 415 V AC, with an 8 kV impulse withstand voltage. The breaker is panel-mounted, fits a 2-module 35 mm backplate, and can be installed horizontally or vertically.
The 25 kA Ics is the service breaking capacity, the level it can clear repeatedly; here it equals Icu, meaning the breaker can handle full-rated faults without derating for repeated operation. The 8 kV impulse withstand (Uimp) tells you it survives typical surge events in a 230/415 V distribution panel. The TM-D trip unit gives fixed thermal (L) and fixed magnetic (I) settings — no adjustment dials, so the 63 A is the only overload setting.
Durability and mechanicals
Rated for 20,000 electrical cycles at 277 V at rated current (In/2 gives 10,000 cycles at full load), and 20,000 mechanical cycles. The toggle control is manual; no shunt trip or auxiliary switch is built in. The breaker is 2 modules wide (35 mm per module) and mounts to a backplate — standard for panelboard or enclosure mounting.