The Siemens SENTRON 3VA2063-6HL32-0HL0 is a 3-pole molded case circuit breaker (MCCB) rated for 63 A continuous current at 40 °C, with an ETU320 electronic overcurrent release and a built-in shunt trip (STL). It's a line-protection device — meaning it sits on the feeder or main branch of a panel, not on a motor or specific load. The interrupting capacity is the headline: 242 kA at 240 V, 187 kA at 415/440 V, 121 kA at 500 V, and 4 kA at 690 V. That's a lot of fault-clearing muscle for a 63 A frame. The shunt trip (STL) allows remote tripping — useful for emergency-stop circuits or supervisory control.
No surprises for a panel builder swapping out an older 3VA1 or competitive frame; the footprint is the same as other 3VA2 breakers in the series.
Thermal performance and derating
At 55 °C it drops to 60.6 A, at 60 °C to 58.3 A, at 65 °C to 55.9 A, and at 70 °C to 53.6 A.
What's inside: auxiliary trip and switch modules
The integrated auxiliary trip is 3VA9688-0BL30. These are factory-fitted — not field-installable kits. If you need a different auxiliary contact count or a different trip unit, you're looking at a different order code, not a field mod.