SENTRON 3VA2 MCCB with integrated shunt trip
The Siemens SENTRON 3VA2063-5HN36-0HA0 is a 3-pole molded case circuit breaker (MCCB) rated for 63 A continuous current, built for line protection in distribution panels and industrial switchgear. It carries a shunt trip release (STL) as the auxiliary release — meaning it can be tripped remotely by applying a control voltage, which is useful for emergency-off circuits or interlocking schemes where you need to drop the breaker without a manual handle pull. Breaking capacity is 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 3 kA at 690 V. That 187 kA at 240 V is a high-interrupting rating — it can clear a massive fault without venting or cascading upstream, which matters when the breaker sits close to a large transformer or a high-capacity bus. Rated insulation voltage is 800 V. The frame holds its 63 A rating across the full ambient temperature range from -25 °C to 70 °C.
Panel fit and dimensions
The breaker measures 105 mm wide, 181 mm high, and 86 mm deep — a standard 3-pole MCCB footprint that fits SENTRON 3VA2 mounting bases and busbar systems. The 86 mm depth (3.39 in) is shallow enough for most 600 mm deep enclosures without crowding the door or cable gutters. No undervoltage release and no ground-fault monitoring on this variant — it is a straight line-protection breaker with the shunt trip as the only auxiliary. If you need UVR or GF protection, you would step to a different 3VA2 order code with those options built in.
Power loss and thermal management
Maximum power loss is 5.4 W at rated current — negligible for panel heat budgeting. Storage range is -40 °C to 80 °C, so it can sit in an unheated warehouse or a hot shipping container without damage.