MCCB for line protection — 63 A, 3-pole, with shunt trip
The Siemens SENTRON 3VA1163-5EF32-0JH0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection, delivering 63 A continuous at 40 °C ambient and holding that rating through 50 °C — only dropping to 62 A at 55 °C and 60 A at 65 °C, so the thermal margin is generous for most panel environments. Interrupting capacity is 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 covers high-fault utility feeds and transformer secondaries where SCCR headroom matters. It ships with a shunt trip release (STL) and an auxiliary switch block: 2 auxiliary switches plus 1 trip alarm switch (HQ configuration). The base switch is order code 3VA11635EF320AA0.
Panel fit and integration notes
Dimensions: 130 mm height, 76.2 mm width, 70 mm depth — fits standard SENTRON 3VA panel cutouts and busbar arrangements. Ambient operating range -25 °C to 70 °C; storage range -40 °C to 80 °C. Rated insulation voltage 800 V; maximum power loss 17.3 W at rated load — factor that into enclosure thermal calculations.