What this MCCB carries — and where it fits
The Siemens SENTRON 3VA2163-5HL36-0JC0 is a 3-pole molded case circuit breaker rated for 63 A continuous at 40 °C, with an electronic ETU320 overcurrent release. It's built for line protection — no ground-fault monitoring, no communication module, no undervoltage release. What it does have is a shunt trip (STL) and two HQ auxiliary switches, so it's ready for remote tripping and status feedback in a control panel. Breaking capacity is the headline: 187 kA at 240 V, 121 kA at 415 V and 440 V, 79 kA at 500 V, and 4.25 kA at 690 V. That's a high-interrupting rating for a 63 A frame — it handles fault currents on the secondary side of a large distribution transformer without needing a current-limiting fuse upstream. Thermal derating is gradual: full 63 A up to 50 °C, then 60.6375 A at 55 °C, 58.275 A at 60 °C, 55.9125 A at 65 °C, and 53.55 A at 70 °C. If your panel ambient runs above 50 °C, size the load accordingly — the breaker won't nuisance-trip, but you lose about 1.2 A per 5 °C rise.
Panel fit and wiring
Dimensions: 105 mm wide, 181 mm tall, 86 mm deep. That's a standard 3-pole MCCB footprint for the SENTRON 3VA frame — it fits the same DIN-rail or screw-mount pattern as other 3VA2 breakers. The 86 mm depth leaves room for rear-connected busbars or a cable-entry gland plate behind the panel door. Power loss is 4 W maximum — negligible for thermal budgeting in a sealed enclosure, but worth noting if you're packing multiple breakers side by side. The auxiliary contact version is two HQ switches, which means high-quantity switching for PLC or SCADA feedback loops.