What the ratings mean for fit
The Siemens 3VA1010-2ED42-0BH0 is a SENTRON molded case circuit breaker (MCCB) rated 100 A at 40 °C, with a 4-pole configuration for three-phase plus neutral line protection. Its breaking capacity reaches 52.5 kA at 240 V AC and 32 kA at 415 V AC — figures that govern its ability to safely interrupt fault currents without upstream coordination failure. The 800 V rated insulation voltage confirms it is built for 690 V line-to-line systems common in industrial distribution. The 100 A rating holds across 40 °C to 50 °C ambient, then derates to 98 A at 55 °C, 96 A at 60 °C, 94 A at 65 °C, and 91 A at 70 °C. This thermal curve matters when the breaker sits in a crowded panel with elevated internal temperature — the full 100 A is only available below 50 °C. The breaker includes an undervoltage release (UVR) and a complement of two auxiliary switches plus one trip alarm switch (HQ), which allows remote status monitoring and automatic shutdown on voltage loss — typical for safety circuits or emergency-stop chains.
Panel integration and deployment context
The MCCB measures 101.6 mm wide, 130 mm tall, and 70 mm deep — a standard 4-pole MCCB footprint for DIN-rail or panel-mount installation in distribution boards and motor control centers. The 70 mm depth fits typical enclosure depths without crowding gland plates or busbar runs.