Siemens SENTRON 3VA2110-5JP32-0HA0 — 100 A MCCB with ETU550 Trip Unit
The Siemens SENTRON 3VA2110-5JP32-0HA0 is a 3-pole molded case circuit breaker rated for 100 A continuous current (Iu) and configured for line protection. It carries an ETU550 electronic trip unit and a shunt trip release (STL) for remote opening.
Thermal Derating and Panel Fit
The breaker carries its full 100 A rating from 40 °C through 50 °C. At 55 °C it derates to 96.25 A, at 60 °C to 92.5 A, at 65 °C to 88.75 A, and at 70 °C to 85 A. If your panel ambient runs above 50 °C, size the load side accordingly — the derating is linear enough to plan around. Dimensions are 105 mm wide, 181 mm high, and 86 mm deep — a standard SENTRON 3VA2 footprint. It mounts on a DIN rail or can be screw-fixed to a backplate. The 86 mm depth means it clears most 200 mm deep enclosures with room for wiring gutters.
Trip Unit and Auxiliaries
The ETU550 is an electronic trip unit with LSI protection curves. This variant ships without ground-fault monitoring and without an auxiliary contact block. It includes a communication function and a shunt trip (STL) for remote tripping. The base switch is order code 3VA2110-5JP32-0AA0, and the integrated auxiliary trip is 3VA9688-0BL30. If you need to order spare trip units or auxiliaries separately, those are the reference numbers.