What this MCCB brings to the panel
The Siemens SENTRON 3VA2010-5HN36-0KL0 is a 3-pole molded case circuit breaker (MCCB) rated for 100 A continuous current, fitted with an ETU350 electronic trip unit. The ETU350 gives you adjustable overload and short-circuit protection curves — useful when coordinating downstream feeders in a distribution board. Breaking capacity hits 187 kA at 240 V AC, 121 kA at 415 V and 440 V, then drops to 79 kA at 500 V and 3.4 kA at 690 V. That 187 kA figure at 240 V means it can interrupt very high fault currents common on the secondary side of large step-down transformers without the breaker failing open. The thermal derating curve is flat from 40 °C to 50 °C at 100 A, then steps down to 96.25 A at 55 °C, 92.5 A at 60 °C, 88.75 A at 65 °C, and 85 A at 70 °C — so in a hot panel you lose about 15 % of capacity at the top end. It ships with a shunt trip (STL) auxiliary release and a full auxiliary contact block: 2 auxiliary switches plus 1 trip alarm switch plus 1 electrical alarm switch (HQ configuration). That means you get both a remote-trip capability and status feedback for your PLC or SCADA without adding a separate accessory module. The undervoltage release is not fitted, and there is no ground-fault monitoring or communication function built in — this is a line-protection breaker, not a power-monitoring device.
Panel fit and integration
Dimensions are 105 mm wide × 181 mm high × 86 mm deep. That 86 mm depth is the body only — account for the handle throw and any rear-mounted accessories when laying out the enclosure depth. The 105 mm width is standard for a 3-pole frame in the SENTRON 3VA platform, so it fits the same DIN-rail or mounting-plate footprint as other 3VA breakers. Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. Maximum power loss is 13.5 W — negligible for most panels but worth noting if you are packing multiple breakers in a sealed enclosure.