SENTRON 3VA1010-3ED42-0DA0 — 100 A MCCB with Undervoltage Release
The Siemens SENTRON 3VA1010-3ED42-0DA0 is a 4-pole molded case circuit breaker rated for 100 A continuous current (Iu) with a TM210 thermal-magnetic overcurrent release. It carries a breaking capacity of 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 voltage on your bus determines which figure governs your fault-interruption requirement. An undervoltage release (UVR) is integrated as standard, tripping the breaker when supply voltage drops below a set threshold — useful for preventing automatic restart after a brownout or for coupling with an emergency-stop circuit that removes control power. The UVR is listed as design 3VA9608-0BB25. This is a line-protection version (no voltage trigger, no communication function, no phase-failure detection), so it is a straightforward thermal-magnetic breaker for feeder and distribution protection — not a motor-protection or power-monitoring device.
Thermal Derating and Installation Constraints
The 100 A rating holds from 40 °C through 50 °C ambient. Above that, the continuous current must be derated: 96 A at 55 °C, 94 A at 60 °C, 92 A at 65 °C, and 90 A at 70 °C. If your panel ambient runs hot — say, a sealed enclosure near a furnace line or a solar combiner box — the 70 °C figure (90 A) is the one that governs your load budget. Dimensions are 70 mm deep, 101.6 mm wide, and 130 mm high. The 101.6 mm width (4-inch footprint) is standard for a 4-pole MCCB on DIN rail or panel-mount; verify gland-plate clearance for the 70 mm depth if back-panel wiring is tight. Front-face protection is IP40 — splash protection only from the front; the sides and rear rely on enclosure IP rating. Rated insulation voltage is 800 V, so the breaker is suitable for 690 V line-to-line systems with margin. Operating temperature range is -25 °C to +70 °C; storage range is -40 °C to +80 °C.