The 3VA1110-5MH36-0CC0 measures 70 mm deep, 76.2 mm wide, and 130 mm high — a standard 3-pole MCCB footprint that fits most DIN-rail or panel-mount enclosures. Depth at 70 mm means it clears most shallow enclosures, but verify the door clearance for the handle mechanism.
Thermal derating and power loss
The breaker is rated 100 A at 40 °C, 45 °C, and 50 °C — no derating needed up to 50 °C. Above that, it drops to 98 A at 55 °C, 96 A at 60 °C, 94 A at 65 °C, and 91 A at 70 °C. Maximum power loss is 27.5 W — that's the heat it dumps into the enclosure at full load, so factor it into your thermal budget.