The EZC100F3045 is a 3-pole EasyPact EZC100F moulded-case circuit breaker from Schneider Electric, rated 45 A at 40 °C (45 A at 50 °C with the TM-D thermal-magnetic trip unit). The 25 kA Icu at 220…240 V AC is the interrupting capacity that determines whether this breaker clears a fault without upstream devices needing to trip — at 380…415 V AC that figure drops to 10 kA Icu, and at 440 V AC to 7.5 kA Icu, so selectivity coordination needs to be checked at your actual system voltage. The 690 V AC rated insulation voltage (Ui) and 550 V AC maximum operational voltage (Ue) cover standard 400 V distribution panels with headroom. IP20 finger protection on the front face is fine for enclosed panels; the IK07 impact rating means the enclosure can take a light tool strike during installation without cracking the housing.
Certified to EN/IEC 60947-2 and EN/IEC 60947-1, plus JIS C8201-2-2 and GB/T 14048.2 for Japanese and Chinese markets. Pollution degree 3 (conductive pollution from condensation or light dust) is standard for industrial control panels. No earth-leakage or neutral protection built in; this is a straight overload and short-circuit device for 3-phase loads.