The Siemens SENTRON 3VA2163-6HN36-0AC0 is a 3-pole molded case circuit breaker rated for 63 A continuous current across the full ambient range from 40 °C to 70 °C — no derating needed as the panel warms up. Breaking capacity hits 242 kA at 240 VAC, dropping to 187 kA at 415/440 V, 121 kA at 500 V, and 3.7 kA at 690 V. This is a line-protection design (not motor-protection), meaning it's sized for feeder and distribution duty where high fault current is the risk, not overload cycling.
At 690 V the 3.7 kA limit means this frame is not for 690 V high-fault applications; that's a different frame size. The 63 A continuous rating is flat across the temperature range, so no headroom calculation for ambient above 40 °C.
Ships with two auxiliary switches HQ factory-installed (no field add-on needed for status feedback).
