The Siemens 3VA2110-7HN32-0AA0 is a 3-pole molded case circuit breaker from the SENTRON 3VA series, rated for 100 A continuous current across the full ambient range from 40 °C to 70 °C — no derating needed up to that ceiling. Interrupting capacity hits 330 kA at 240 V AC and 242 kA at 415/440 V AC, so it handles high-fault utility feeds without cascading failure.
Mounting and integration — panel fit
The 3VA2110-7HN32-0AA0 occupies 105 mm width per pole, 181 mm height, and 86 mm depth — dimensions that match the standard SENTRON 3VA cutout for 3-pole frames. Front-facing IP40 protection means the breaker can be mounted in a dust-exposed enclosure without a separate cover. The ETU350 trip unit is self-powered from the line side; no auxiliary control voltage needed for basic protection.
Selectivity and fault handling
With 330 kA interrupting capacity at 240 V and 242 kA at 415 V, this MCCB is sized for high-fault installations — typically service entrance or main feeder positions where the available fault current exceeds what a standard 25 kA or 65 kA breaker can clear. Maximum power loss is 10 W, which matters for enclosed panel thermal calculations.