The Siemens 3VA2063-5HL36-0BH0 is a SENTRON molded case circuit breaker rated 63 A continuous at 40 °C, 3-pole, with an ETU320 electronic trip unit. It's a line-protection version — no ground-fault module, no communication stack, no voltage trigger. The ETU320 is a basic electronic trip — fixed thermal and magnetic curves, no LSIG selectivity options. That matters if you're coordinating downstream breakers in a distribution panel; you get standard time-current curves, not the adjustability of an ETU600. The 63 A rating holds flat through 50 °C, then derates to 53.55 A at 70 °C.
Dimensions are 105 mm wide, 181 mm high, 86 mm deep — standard 3-pole MCCB footprint for a 160 A frame. If your panel already has that UVR coil wired, this drops straight in.