What this MCCB is and what it protects
The Siemens 3VA2163-5HL36-0CL0 is a SENTRON molded case circuit breaker (MCCB) designed for line protection — meaning it sits at the feeder or sub-feeder to protect cables and busbars against overload and short circuit, not a specific motor or machine load. Rated 63 A continuous across the full ambient range from 40 °C to 70 °C, so no derating curve to chase for typical panel temperatures. Breaking capacity runs 187 kA at 240 V, 121 kA at 415/440 V, 75.6 kA at 500 V, and 3.7 kA at 690 V — the high 240 V figure tells you this unit is built for high-fault utility or transformer-fed panels, not just branch circuits.
Panel fit and auxiliary complement
Footprint is 105 mm wide × 181 mm tall × 86 mm deep — a standard 3-pole MCCB envelope for a 63 A frame, sized for DIN-rail or screw-mount backpan assembly. Ships with a full auxiliary complement: 2 auxiliary switches, 1 trip alarm switch, and 1 electrical alarm switch (HQ type), plus an undervoltage release (UVR) integrated — so the panel builder does not need to order those as separate add-on modules. Trip indicator on the front face gives a quick visual on whether the breaker opened on overload/short or was manually switched off — saves a multimeter probe during fault isolation.