63 A MCCB with 220 kA interrupting — line protection focus
The Siemens 3VA1163-6EF32-0DA0 is a SENTRON molded case circuit breaker rated for 63 A continuous current (Iu) across the ambient range up to 50 °C, with derating starting at 55 °C to 60.48 A and dropping to 56.7 A at 70 °C. The interrupting ratings are 220 kA at 240 V, 154 kA at 415 V, 121 kA at 440 V, and 17 kA at 690 V — these are the fault-clearing capacities the breaker can safely interrupt without upstream damage. An undervoltage release is built in, so if control voltage drops, the breaker trips; the auxiliary trip accessory (3VA9608-0BB25) is ordered separately.
Panel fit and integration constraints
The 3-pole breaker occupies 76.2 mm width, 130 mm height, and 70 mm depth. No auxiliary contacts are integrated, so if you need status feedback, plan for the separate 3VA9608-0BB25 auxiliary trip module. The undervoltage release is wired to a separate control circuit; verify coil voltage compatibility with your 24 VDC or 110 VAC supply before termination.
The 220 kA SCCR at 240 V and 154 kA at 415 V put this breaker in the high-interrupting category — suited for transformer secondaries or large busway feeds where available fault current exceeds 100 kA. The TM240 release provides fixed thermal pickup and magnetic trip; adjustability is limited, so coordination studies should verify the trip curve against downstream breakers.