The Schneider Electric EZC100F3063 is a 3-pole EasyPact EZC100F moulded-case circuit breaker with a thermal-magnetic TM-D trip unit rated 63 A at 50 °C. The thermal-magnetic trip gives you an inverse-time overload curve (the thermal bimetal) plus instantaneous magnetic short-circuit protection, so it covers both sustained overloads and hard faults in one compact package. Breaking capacity is where this breaker earns its keep in a distribution panel. Drop to 380–415 V AC and it still handles 10 kA; at 440 V AC it holds 7.5 kA; at 550 V AC it manages 5 kA. On the DC side, it breaks 5 kA at 125 V DC (1-pole) and 5 kA at 250 V DC (2-pole). For a 63 A feeder in a 400 V panel with a typical transformer impedance, 10 kA is usually enough headroom — but if your upstream transformer is oversized or your fault current study shows higher, check the 25 kA 240 V number against your service-entrance rating.
Mounting and enclosure fit
This breaker mounts fixed to a backplate, not on a DIN rail. That is typical for Moulded-Case Circuit Breakers (MCCBs) in this frame size — you bolt it to the panel's mounting plate, torque the terminals to spec, and wire front-to-front. The 25 mm connection pitch spaces the phase terminals evenly, which keeps busbar and cable-lug alignment predictable. IP20 finger-safe protection means the front face is touch-safe when the cover is on; IK07 impact resistance handles the odd dropped tool during commissioning.
Standards and approvals — what they certify
It also carries GB/T 14048.2 (China) and JIS C8201-2-2 (Japan) marks, so it is accepted across major global markets without a separate re-certification. Lifecycle status is current production. No EOL notice or last-time-buy on record. This is a standard catalogue item in Schneider's EasyPact range, so it is not a niche or legacy SKU that might vanish on short notice.