What the ratings mean for fit
The 3VA1063-4ED42-0CC0 is a 4-pole SENTRON molded case circuit breaker carrying a 63 A rated continuous current (Iu) that holds flat from 40 °C to 50 °C — no derating needed in a typical 40 °C panel. At 55 °C it still delivers 60.48 A, at 60 °C it delivers 59.22 A, at 65 °C it delivers 57.96 A, and at 70 °C it delivers 56.7 A, so you get full 63 A capacity in most standard enclosures without oversizing the frame. Breaking capacity is the headline here: 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at 690 V. That 121 kA at 240 V means it safely interrupts high-fault currents on the secondary side of a large transformer — useful for main or feeder breakers in industrial panels where available fault current is high. The TM210 thermal-magnetic release is a fixed-trip curve, not electronic, so there is no adjustment dial; the trip curve is set at the factory. The part includes an undervoltage release (UVR) as the auxiliary release design, plus two auxiliary switches HQ (high-quality) for status feedback to a PLC or indication lamp. No ground fault monitoring, no phase failure detection, no communication function — this is a straightforward line-protection MCCB, not a smart breaker. The IP40 rating on the front means it is protected against solid objects over 1 mm but not against water ingress; suitable for dry indoor panel mounting.
Panel integration and mounting
Mounts on a DIN rail or can be screw-mounted via the base. Dimensions: 70 mm deep, 101.6 mm wide, 130 mm tall — fits a standard MCCB slot in a SENTRON distribution board or a third-party enclosure. The 4-pole width (101.6 mm) is roughly 4 modules of 25.4 mm each. Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C, so it handles cold warehouses and hot panel summers without issue.