The Siemens 3VA1063-3ED36-0DH0 is a SENTRON 3VA molded case circuit breaker (MCCB) rated for 63 A continuous current across a 40–50 °C ambient range, with thermal derating starting at 55 °C down to 56.7 A at 70 °C.
Breaking capacity — what it handles
This MCCB's interrupting capacity varies significantly with system voltage: 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 7.5 kA at 690 V. The 240 V figure is the highest and tells you it can clear a bolted fault in a 240 V panel without blowing up. At 415 V it still handles 52.5 kA — ample for most industrial distribution. This is not a universal high-breaking unit; it's sized for the common low-voltage range.
Auxiliary contacts and release
The auxiliary contacts allow remote status monitoring: the alarm switch signals a trip event separately from the aux that tracks the main contact position. No communication module is fitted, so this is a hardwired-only unit.