What this MCCB delivers
The Siemens 3VA1010-2ED42-0DH0 is a 4-pole SENTRON molded case circuit breaker rated for 100 A continuous current at 40 °C, with a TM210 thermal-magnetic overcurrent release. Its breaking capacity reaches 52.5 kA at 240 V, 32 kA at 415 V, 13.6 kA at 440 V, and 7.5 kA at 690 V — figures that tell you where it can safely interrupt a fault without upstream cascading. The 800 V rated insulation voltage (Ui) confirms it's built for 690 V line-to-line systems with margin. This is a line-protection breaker — no ground-fault monitoring, no communication module, no phase-failure detection. It's a straight thermal-magnetic device for feeder or main breaker duty in distribution panels, sized for a 100 A bus.
Current derating and temperature
The 3VA1010-2ED42-0DH0 holds its full 100 A rating from 40 °C up to 50 °C. At 55 °C it derates to 96 A, at 60 °C to 94 A, at 65 °C to 92 A, and at 70 °C to 90 A. If your panel ambient runs above 50 °C, you lose capacity — plan the enclosure ventilation or upsize the frame.
Panel fit and auxiliary contacts
The breaker measures 70 mm deep, 101.6 mm wide, and 130 mm high — a standard SENTRON 3VA frame that mounts on a DIN rail or panel plate. It ships with 2 auxiliary switches plus 1 trip alarm switch (HQ version) and an integrated undervoltage release (UVR). The front face carries an IP40 protection class, suitable for enclosed distribution boards.