The Siemens 3VA2163-7HL42-0AA0 is a SENTRON molded case circuit breaker (MCCB) with 4 poles, rated for a continuous current of 63 A across the full ambient range from 40 °C to 70 °C — no derating needed up to that ceiling. It's a line-protection device, meaning it's the main feeder breaker or a large subfeed breaker in a distribution panel, not a motor-protection or generator breaker. The interrupting ratings are where this part earns its keep: 330 kA at 240 V, 242 kA at 415 V and 440 V, 187 kA at 500 V, and 3.8 kA at 690 V. Those numbers mean it can safely clear a bolted fault at the main switchboard without the arc flash escalating — the 330 kA at 240 V is the headline figure for high-fault industrial services in North America, while the 242 kA at 415 V covers European 400 V panels.
The N-conductor protection is adjustable: OFF or 100% of the phase rating. The adjustable response time (tr) ranges from 0.5 to 17 seconds, which lets you coordinate with downstream breakers for selectivity. IP40 on the front.
4-pole width of 140 mm. Power loss is 4 W maximum. If you need remote monitoring or trip indication, you'll add auxiliary switches or shunt trips externally.