The Siemens 3VA2063-5HL32-0JC0 is a SENTRON 3VA2 molded case circuit breaker (MCCB) rated for 63 A continuous current at 40 °C, with three poles and an ETU320 electronic trip unit configured for line protection. At 690 V it still clears 3.4 kA, so it covers 480Y/277 V and 600 V class panels within the same frame.
Ratings that govern the selection
Above 50 °C it steps down: 60.6 A at 55 °C, 58.3 A at 60 °C, 55.9 A at 65 °C, and 53.6 A at 70 °C. Maximum power loss is 5.4 W per pole, which matters for thermal budgeting in a multi-breaker panel.
Trip unit and auxiliary hardware
The ETU320 is an electronic overcurrent release with LSI protection (long-time, short-time, instantaneous) — adjustable, so you can coordinate downstream breakers without oversizing the main. A built-in shunt trip (STL) allows remote tripping via a control signal.