Siemens 3VA1163-6EF36-0CA0 — 63 A MCCB with 220 kA SCCR
The Siemens 3VA1163-6EF36-0CA0 is a 3-pole SENTRON molded case circuit breaker (MCCB) rated for 63 A continuous current at 40 °C, with a TM240 thermal-magnetic overcurrent release and an integrated undervoltage release (UVR). Its headline breaking capacity of 220 kA at 240 V (154 kA at 415 V, 121 kA at 440 V, 17 kA at 690 V) means it can safely interrupt fault currents up to those levels without cascading upstream — a key spec for high-fault panels where upstream breaker coordination is tight. Rated insulation voltage is 800 V, and the front face carries IP40 protection — suitable for enclosed panel mounting where the breaker is not exposed to washdown or dust ingress. This is a line protection version (no ground fault monitoring, no phase failure detection, no communication function), designed for straightforward overcurrent and short-circuit protection of feeders and downstream loads.
Thermal derating and operating range
The 63 A rating holds flat from 40 °C through 50 °C, then derates linearly to 56.7 A at 70 °C — a gentle curve that gives headroom in warm enclosures without oversizing the frame. Operating ambient range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. Latching endurance is 15,000 cycles.
Lifecycle and sourcing posture
No auxiliary contacts are fitted as standard; the auxiliary trip is a separate order (3VA9608-0BB24) if remote signaling is needed.
Panel integration and footprint
Dimensions are 130 mm height, 76.2 mm width, 70 mm depth — a compact 3-pole frame that fits standard panel cutouts for the 3VA platform. The undervoltage release (UVR) is factory-fitted; verify coil voltage compatibility with your control circuit before installation.