The Siemens SENTRON 3VA2063-8HM46-0AA0 is a 4-pole molded case circuit breaker (MCCB) rated for line protection, carrying a continuous current Iu of 63 A across the full ambient range from 40 °C up to 70 °C — no derating needed in a warm panel. Its interrupting capacity hits 440 kA at 240 V and still delivers 330 kA at 415 V and 440 V, so it handles high-fault utility feeds or transformer-secondaries without cascading upstream breakers.
Front-face protection is IP40, meaning tools or fingers won't accidentally contact live terminals during operation; the enclosure itself is not sealed for washdown.
Ground-fault and communication
This variant includes ground-fault monitoring via summation current formation on L + N conductors — useful for detecting leakage on solidly-grounded systems without a separate GF relay. There is no communication module onboard (no voltage trigger, no trip indicator, no undervoltage release), so it's a straightforward line-protection device with no auxiliary wiring beyond the power circuit.