What this MCCB carries
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 interrupting capacity hits 187 kA at 240 V and 121 kA at 415 V, so it handles high-fault utility feeds without cascading upstream. 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.
Panel fit and auxiliaries
Dimensions are 105 mm wide, 181 mm high, 86 mm deep — standard 3-pole MCCB footprint for a 160 A frame. It ships with a factory-fitted undervoltage release (UVR) and an auxiliary contact block carrying 2 aux switches plus 1 trip alarm switch (HQ). The supplied basic switch is order code 3VA2063-5HL36-0AA0; the integrated auxiliary trip is 3VA9608-0BB11. If your panel already has that UVR coil wired, this drops straight in. Power loss maxes at 7.9 W — negligible for thermal budgeting in a packed enclosure. Operating range is -25 °C to 70 °C; storage from -40 °C to 80 °C. No communication function, no phase-failure detection, no ground-fault monitoring — this is a straight line-protection breaker, not a multifunction power monitor.