Panel fit and what the ratings mean
The Siemens 3VA2163-7MN36-0HL0 is a SENTRON 3VA2 molded case circuit breaker (MCCB) built for motor protection duty. It's a 3-pole unit rated a flat 63 A across the full ambient range from 40 °C to 70 °C — no derating curve to chase when the panel runs hot. That 63 A holds steady even at 70 °C, which is unusual; most breakers start dropping current above 40 °C. The interrupting capacity hits 330 kA at 240 V, 242 kA at 415 V and 440 V, and 187 kA at 500 V — drops to 3.7 kA at 690 V, so watch the system voltage if you're spec'ing into a 690 V line. That 330 kA figure at 240 V means it can clear a bolted fault on a high-capacity transformer secondary without the arc re-striking; it's sized for industrial switchgear, not light commercial. The design is explicitly motor protection, which means the thermal-magnetic or electronic trip curve is shaped for motor inrush — it rides through the starting surge without nuisance tripping, then clears a locked-rotor fault. Phase failure detection is built in, so a lost phase on the line side won't let the motor single-phase to destruction. The auxiliary switch complement is two auxiliary switches plus one trip alarm switch plus one electrical alarm switch HQ, and there's a shunt trip (STL) release fitted for remote emergency stop or undervoltage tripping. No undervoltage release on this variant, so if you need UVR, this isn't the order code. Dimensions are 105 mm wide, 181 mm high, 86 mm deep — standard 3VA2 3-pole footprint. It mounts on a DIN rail or panel-mount baseplate.
Integration notes for the panel builder
The 86 mm depth is the dimension from the mounting surface to the front of the breaker — check your gland plate clearance if you're back-paneling with deep cable entries. The 105 mm width is the standard 3-pole MCCB envelope. Operating temperature range is -25 °C to +70 °C; storage range is -40 °C to +80 °C. If the breaker sits in an unheated warehouse before installation, the storage range covers it. The 4 W maximum power loss is the heat dissipated at full rated current — factor that into your enclosure ventilation calculation if you're stacking multiple breakers in a sealed box.