What this MCCB carries
The Siemens SENTRON 3VA1163-5EF32-0BA0 is a 3-pole molded case circuit breaker rated 63 A at 40 °C, with a breaking capacity of 187 kA at 240 V. It's designed for line protection and includes an undervoltage release (UVR). The TM240 overcurrent release handles thermal-magnetic trip characteristics. Rated insulation voltage is 800 V.
Breaking capacity across voltages
This MCCB delivers 187 kA at 240 V, 121 kA at 415 V, 75.6 kA at 440 V, and 17 kA at both 500 V and 690 V. That spread covers most industrial distribution panels where high fault current is a concern at lower voltages.
Thermal derating curve
Rated current holds at 63 A from 40 °C through 50 °C, then drops to 62 A at 55 °C, 61 A at 60 °C, 60 A at 65 °C, and 58 A at 70 °C. If your panel ambient runs above 50 °C, factor in that derating — the breaker still carries the load but at reduced ampacity.
Mounting and dimensions
The breaker measures 130 mm high, 76.2 mm wide, and 70 mm deep. That 3-inch width is standard for a 3-pole MCCB — fits most panelboard slots without crowding adjacent poles. No trip indicator or voltage trigger on this variant.
Power loss and environmentals
Maximum power loss is 19.8 W — useful for thermal budget in a sealed enclosure. Operating range is -25 °C to 70 °C; storage from -40 °C to 80 °C.