63 A MCCB for line protection — thermal-magnetic TM240 release
The Siemens SENTRON 3VA1163-5EF32-0AE0 is a 3-pole molded case circuit breaker (MCCB) rated 63 A continuous at 40 °C through 50 °C, with a slight thermal derating curve down to 58 A at 70 °C. Its TM240 overcurrent release is a fixed thermal-magnetic type — no electronic adjustment, no communication module — designed for straightforward line protection in distribution panels.
Interrupting capacity — what the ratings mean for panel coordination
This MCCB delivers 187 kA at 240 V AC, 121 kA at 415 V, 75.6 kA at 440 V, and 17 kA at both 500 V and 690 V. Those numbers define the maximum fault current the breaker can safely interrupt at each voltage level — critical for selectivity studies and SCCR compliance. A 187 kA rating at 240 V means it can sit downstream of a large transformer without needing a current-limiting fuse upstream, as long as the available fault current at that point stays under that threshold.
Dimensions and panel fit
At 70 mm deep, 76.2 mm wide, and 130 mm tall, the 3VA1163-5EF32-0AE0 fits the standard SENTRON 3VA mounting footprint. The width of 76.2 mm (3 inches) matches the typical 3-pole MCCB slot in a distribution board — no adaptor plate needed for most Siemens panelboards. Depth of 70 mm leaves clearance for rear-connected busbars or cable exits.
Auxiliary switch configuration and power loss
Factory-equipped with 4 HQ auxiliary switches (2 NO + 2 NC) for status feedback to a PLC or indication lamp — no separate add-on block needed. Maximum power loss is 17.3 W at rated current, which matters for thermal management inside a sealed enclosure. The basic switch variant is 3VA11635EF320AA0.