The Siemens 3VA1010-3ED42-0DH0 is a SENTRON molded case circuit breaker (MCCB) rated 100 A at 40 °C, with a 4-pole configuration and a maximum interrupting capacity of 75.6 kA at 240 V. It is designed for line protection and includes an undervoltage release, making it suitable for main or feeder protection in industrial distribution panels.
Interrupting Ratings and Thermal Derating
Interrupting capacity varies with voltage: 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 7.5 kA at 500 V and 690 V. This means the breaker can safely clear faults up to those levels depending on the system voltage — critical for selectivity studies on a 480 V or 400 V line. Thermal rating holds at 100 A from 40 °C through 50 °C, then derates to 98 A at 55 °C, 96 A at 60 °C, 94 A at 65 °C, and 91 A at 70 °C. If the panel ambient runs above 50 °C, factor the derating into the load schedule.
Physical Fit and Auxiliary Configuration
Dimensions: 70 mm depth, 101.6 mm width, 130 mm height. The 4-pole footprint fits standard panel-mount cutouts for SENTRON 3VA frames. The breaker includes an undervoltage release (UVR) and is equipped with two auxiliary switches plus one trip alarm switch (HQ) — enough for remote status feedback without an external relay.