The Siemens SENTRON 3VA2163-5HN36-0AE0 is a 3-pole molded case circuit breaker rated for line protection, carrying a continuous current Iu of 63 A that holds flat from 40 °C through 50 °C — no derating needed in a warm enclosure until you cross 55 °C, where it steps down to 60.6 A. The interrupting rating is the headline here: 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. Four HQ auxiliary switches come integrated, so you get status feedback without bolting on an external accessory block.
Mounting and integration — DIN-rail or panel-mount, IP40 front
The IP40 front protection means it's splash-safe from the front face in a closed enclosure; the busbar connections and terminals are inside the panel, not exposed. Maximum power loss is 4 W — negligible for thermal budgeting inside a crowded cabinet. The mechanical endurance is 20,000 operations — that's the latching mechanism life, not the electrical switching life under load.