What this MCCB delivers
The SENTRON 3VA1163-5EF32-0DA0 is a 3-pole molded case circuit breaker rated for line protection, carrying a full-load current of 63 A at 40 °C ambient — no derating needed at that temperature, and only a mild drop to 58 A at 70 °C, which matters when it's mounted in a warm panel near other heat sources. Breaking capacity is the headline here: 187 kA at 240 V and 121 kA at 415 V mean this breaker can interrupt very high fault currents without upstream devices needing to clear first — critical for selectivity in a distribution board feeding downstream sub-panels or motor control centers. It ships with an undervoltage release (UVR) built in, so a loss of control voltage will trip the breaker — a standard requirement for emergency-stop circuits and safety-related disconnects in industrial machinery.
Selectivity and coordination
The 187 kA SCCR at 240 V puts this in the high-interrupting class for a 63 A frame. In a panel where the upstream transformer or main breaker can deliver that fault current, this MCCB holds the line without cascading — the downstream breakers can be lower-rated because this one clears the big faults. At 415 V the 121 kA rating still covers most industrial distribution scenarios. The TM240 overcurrent release is a thermal-magnetic type, so it provides both overload protection (thermal) and short-circuit protection (magnetic) in one unit — no separate relay needed.
Panel fit and mounting
Dimensions are 130 mm height, 76.2 mm width, 70 mm depth — a 3-pole MCCB frame that fits standard Siemens SENTRON mounting bases and busbar systems. Operating range spans -25 °C to 70 °C ambient, with storage from -40 °C to 80 °C. That covers most indoor industrial panel conditions, including unheated warehouses and enclosures near process heat.
Power loss and thermal management
Maximum power loss is 19.8 W at rated load. That's the heat the breaker dumps into the enclosure — relevant for calculating internal temperature rise in a sealed panel. At 63 A continuous, 19.8 W is moderate for a 3-pole MCCB; no forced cooling required in a properly sized cabinet.