Siemens 3VA1063-4ED32-0AF0 — 63 A MCCB for Line Protection
The Siemens SENTRON 3VA1063-4ED32-0AF0 is a 3-pole molded case circuit breaker (MCCB) rated 63 A at 40 °C, designed for line protection. It carries a breaking capacity of 121 kA at 240 V AC and 75.6 kA at 415 V AC — figures that tell you it handles high-fault-current scenarios typical of industrial distribution panels without cascading upstream. The TM210 thermal-magnetic release provides overcurrent and short-circuit protection; the trip indicator gives a clear visual signal after a fault event.
Breaking Capacity and Coordination
The 121 kA at 240 V and 75.6 kA at 415 V are the maximum short-circuit currents this MCCB can safely interrupt at those voltages. For a 480 V or 600 V class panel, the capacity drops to 52.5 kA at 440 V and 11.9 kA at 500 V and 690 V — still adequate for most secondary distribution, but verify your available fault current before committing the BOM line. The rated insulation voltage of 800 V gives headroom for 690 V systems.
Thermal Derating and Panel Fit
The 63 A rating holds from 40 °C through 50 °C; above that it derates linearly to 58 A at 70 °C. If your panel ambient runs hot, factor the 60 A at 65 °C figure into your load schedule. The 3VA frame measures 70 mm deep by 76.2 mm wide by 130 mm high — fits standard Siemens 3VA panel cutouts and bus-bar centers. Maximum power dissipation is 17.3 W, so ventilation in a sealed enclosure should be checked.