63 A MCCB with 121 kA interrupting capacity at 240 V
The Siemens SENTRON 3VA1063-4ED36-0AA0 is a 3-pole molded case circuit breaker rated for 63 A continuous current at 40 °C ambient, with no derating needed up to 50 °C. Its TM210 thermal-magnetic release handles overload and short-circuit protection in one package, designed specifically for line protection duty. The interrupting capacity hits 121 kA at 240 V AC — enough for high-fault utility feeds — and still delivers 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at 500 V and 690 V. That SCCR headroom means it can sit upstream of lower-rated branch devices without cascading failure concerns. Rated insulation voltage is 800 V, and the breaker carries an IP40 protection rating on the front — fine for clean indoor panel environments. Maximum power loss is 17.3 W. Operating temperature range spans -25 °C to 70 °C, with storage from -40 °C to 80 °C.
Panel fit and dimensions
The breaker measures 130 mm high, 76.2 mm wide, and 70 mm deep — a standard 3-pole MCCB footprint that fits most DIN-rail or panel-mount enclosures without surprises. Width of 76.2 mm (3 inches) matches the typical 3-pole cutout for SENTRON 3VA frames. No undervoltage release, no voltage trigger, and no communication function are fitted on this variant — it is a straight thermal-magnetic line-protection device.