The Schneider Electric EZ9F34163 is a 1-pole miniature circuit breaker from the Easy9 range, rated at 63 A with a C-curve trip characteristic. Breaking capacity is 4.5 kA Icn at both 230 V AC and 400 V AC (50/60 Hz), with the service breaking capacity Ics at 100% of Icn — meaning after clearing a fault at its rated level the breaker remains functional and can be reclosed.
Clip-on mounting to a 35 mm DIN rail, 18 mm width per pole (2 x 9 mm pitches). The tunnel-type terminals accept up to 35 mm² rigid or 25 mm² flexible cable, with a tightening torque of 3.5 N·m. IP20 rated for use inside enclosed panels.