63 A MCCB with undervoltage release — SENTRON 3VA line protection
The Siemens 3VA1063-4ED42-0DA0 is a 4-pole molded case circuit breaker from the SENTRON 3VA series, designed for line protection in distribution panels. It carries a continuous current rating of 63 A at 40 °C (derated to 58 A at 70 °C) and a rated insulation voltage of 800 V. Breaking capacity is 121 kA at 240 V AC, 75.6 kA at 415 V, and 52.5 kA at 440 V — figures that cover most low-voltage fault scenarios in industrial and commercial mains. The TM210 thermal-magnetic overcurrent release handles the overload and short-circuit protection curves. An integrated undervoltage release (UVR) is fitted as standard, so the breaker trips automatically when supply voltage drops below a threshold — useful for motor control centers or safety circuits that require loss-of-voltage protection. Dimensions are 130 mm high, 101.6 mm wide, and 70 mm deep — a standard 4-pole MCCB footprint that fits most Siemens 3VA panelboards and retrofit cutouts.
Current production — sourcing and lifecycle
Maximum power loss is 19.8 W — a figure to factor into enclosure thermal calculations when grouping several breakers in a panel. Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. The breaker is rated for use in unconditioned enclosures within those limits.
Selectivity and coordination notes
With a 63 A frame and high interrupting ratings (121 kA at 240 V, 75.6 kA at 415 V), this MCCB is suited for main or feeder positions where fault current is substantial. The TM210 release provides thermal-magnetic protection — no electronic adjustment, but the fixed curve is well-characterized for coordination with downstream 3VA or 5SY series breakers. No communication function or ground-fault monitoring is built in; those capabilities require a different variant (3VA11 or 3VA12 with electronic release).