The Siemens 3VA1063-3ED42-0AF0 is a SENTRON molded case circuit breaker (MCCB) rated for line-protection duty. It carries a continuous current of 63 A at 40 °C, derating to 58 A at 70 °C, so the thermal curve stays predictable across a warm panel interior. The 4-pole design handles three-phase plus neutral, common in North American and European distribution panels where the neutral needs overcurrent protection.
Breaking capacity and coordination
Breaking capacity is voltage-dependent: 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 7.5 kA at 500 V and 690 V. At typical 480/277 V distribution, the 32 kA at 440 V is the closest published point — expect the actual interrupting rating at 480 V to sit between the 440 V and 500 V values. The 7.5 kA floor at 690 V covers most industrial motor-control centers. Rated insulation voltage is 800 V, so the breaker is suitable for 690 V line-to-line systems without additional derating of the internal clearances.
Overcurrent release and auxiliaries
The TM210 overcurrent release is a thermal-magnetic type — fixed thermal element for overload, magnetic for short-circuit. No electronic adjustment, no communication module, no undervoltage release. The breaker ships with one auxiliary switch and one trip-alarm switch (HQ design), enough to signal the breaker state back to a PLC or annunciator panel. Ground-fault monitoring is not built in; if GF protection is needed, it must come from an external module or upstream device.
Physical fit and environment
Dimensions are 70 mm deep, 101.6 mm wide, 130 mm high — a standard 4-pole MCCB footprint that drops into most Siemens SENTRON panelboards and distribution blocks without adapters. Operating range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. Maximum power dissipation is 17.3 W, so ventilation in a sealed enclosure should account for that heat load when grouping multiple breakers.