What this MCCB is and what it does
The Siemens 3VA1063-4ED42-0BH0 is a SENTRON molded case circuit breaker (MCCB) rated for 63 A continuous current, 4-pole, with a TM210 thermal-magnetic release. It is configured as a line-protection device — meaning its trip curve is set for feeder and main-switch duty, not motor or generator protection. The 800 V rated insulation voltage (Ui) gives headroom for 690 VAC systems, and the interrupting ratings climb to 121 kA at 240 VAC, 75.6 kA at 415 VAC, 52.5 kA at 440 VAC, and 11.9 kA at 690 VAC — so it handles high-fault-current points of common coupling without cascading upstream.
Thermal derating and auxiliary contacts
The 63 A rating holds flat from 40 °C through 50 °C ambient. Above that it derates: 60.48 A at 55 °C, 59.22 A at 60 °C, 57.96 A at 65 °C, and 56.7 A at 70 °C. The operating temperature range is -25 °C to +70 °C; storage range is -40 °C to +80 °C. The breaker ships with 2 auxiliary switches plus 1 trip-alarm switch (HQ configuration), and an integrated undervoltage release (UVR) is built in — the auxiliary release order code for documentation is 3VA9608-0BB11. No communication module, no ground-fault monitoring, no phase-failure detection on this variant.
Panel fit and mechanical endurance
The 4-pole MCCB measures 101.6 mm wide, 130 mm tall, and 70 mm deep — a standard SENTRON 3VA footprint that drops into existing panel layouts without re-drilling. Front-face protection is IP40. The mechanical endurance is rated at 15 000 operations, which is typical for a line-protection MCCB in main-switch or infrequent-switching service.