The Schneider Electric EZ9F53163 is a 1-pole Easy9 miniature circuit breaker rated at 63 A with a C-curve trip characteristic. It provides a 3 kA breaking capacity at 230 V AC, compliant with SANS 60947-2. The thermal-magnetic trip unit handles overloads and short circuits in distribution applications.
The C-curve (magnetic trip at 8.5 x In ±20%) means it tolerates moderate inrush, typical for lighting banks or small motor groups, but not high-starting loads like large compressors. The 3 kA breaking capacity at 230 V AC is the maximum fault current it can safely interrupt; in South Africa (where SANS 60947-2 applies) this suits most residential and light commercial panels where the prospective short-circuit current stays under that level. The 1-pole format protects a single phase line.
Clip-on mounting to a DIN rail, 18 mm width (2 x 9 mm pitches). Tunnel terminals accept 1 to 35 mm² rigid or flexible cable; tightening torque is 3.5 N.m. Ambient operation from -5 to 60 °C.