The Siemens SENTRON 3VA2110-5JQ32-0AH0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection, carrying a continuous current of 100 A up to 50 °C. Its breaking capacity hits 187 kA at 240 V and 121 kA at 415 V, which means it can safely interrupt very high fault currents without upstream cascading — a key spec for high-fault panels where selectivity matters.
Breaking capacity and thermal derating
Breaking capacity drops with voltage: 121 kA at 440 V, 79 kA at 500 V, and 4.25 kA at 690 V. That 690 V figure is low enough that you need to verify coordination if the circuit operates near that voltage — the MCCB is still rated, but the margin tightens. Thermal derating is flat to 50 °C at 100 A, then steps down: 96.25 A at 55 °C, 92.5 A at 60 °C, 88.75 A at 65 °C, and 85 A at 70 °C. If the panel ambient runs at 60 °C, you lose 7.5 A of headroom — factor that into the load schedule.
Trip unit and auxiliary contacts
Fitted with an ETU560 electronic overcurrent release — that's the programmable, communicating trip unit in the SENTRON family, giving you adjustable LSI (long-time, short-time, instantaneous) protection curves plus ground-fault summation via the L-conductor. Communication function is built in, so it can talk to a higher-level monitoring system for trip data and status. Auxiliary contact configuration is 2 auxiliary switches plus 1 trip alarm switch (HQ version). That gives you two separate status signals (e.g., open/closed) and a dedicated alarm on trip — enough for remote indication without an external relay.
Panel fit and environment
Dimensions are 181 mm high, 105 mm wide, 86 mm deep. That 105 mm width is standard for a 3-pole SENTRON 3VA2 frame — it mounts on a DIN rail or panel-mount adapter, and the IP40 front face means it's protected against solid objects over 1 mm but not sealed against moisture. Operating temperature range is -25 °C to 70 °C; storage from -40 °C to 80 °C.