What this part is — and isn't
The Siemens 3VA1110-1AA36-0BH0 is a SENTRON 3VA1 switch disconnector in an MCCB-style housing — IEC frame 160, 3-pole, rated 100 A continuous. It is not a circuit breaker: there is no overload or short-circuit release inside. This is a load-break disconnect with an undervoltage release (UVR) for controlled opening when control voltage drops. The 24 V DC UVR coil pulls in to keep the main contacts closed; loss of voltage trips it open. Two auxiliary switches HQ plus one trip alarm switch HQ report position back to the PLC or panel indication.
Thermal performance — flat derating to 70 °C
Rated 100 A across the full operating temperature range from 40 °C to 70 °C — no derating curve to calculate. That matters in a sealed or poorly ventilated enclosure where ambient climbs. Maximum power loss is 38 W at full load, so the heat it dumps into the cabinet is predictable. Operating range is -25 °C to 70 °C; storage from -40 °C to 80 °C.
Integration into the panel
Front-terminal connection, clamp type, for the main circuit. Dimensions: 130 mm high, 76.2 mm wide, 70 mm deep — a standard 3-pole MCCB footprint. IP40 on the front face; the rest of the body is not rated for washdown, so keep it inside the enclosure. Mechanical service life is 15 000 operating cycles typical. An optional motor drive can be added for remote switching.