What this MCCB brings to the panel
The Siemens SENTRON 3VA2010-5HL36-0KL0 is a 3-pole molded case circuit breaker rated for 100 A continuous current, with an interrupting capacity of 187 kA at 240 V and 121 kA at 415 V. Those numbers mean it can clear a bolted fault on a large transformer secondary or a high-capacity bus without the arc re-striking — the kind of SCCR headroom you need for a main breaker in a 480 V industrial panel. The ETU320 electronic trip unit gives you adjustable long-time, short-time, and instantaneous protection curves, so you can coordinate downstream feeders without nuisance trips. A shunt trip (STL) is built in for remote emergency-off or fire-alarm cut.
Thermal derating and real-world current
The breaker holds its full 100 A rating up to 50 °C ambient. 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 runs hot — say, a sealed enclosure near a furnace line — you need to account for that drop. The maximum operating temperature is 70 °C; storage range is -40 °C to 80 °C. Power loss at full load is 13.5 W, which matters for thermal budgeting inside a crowded cabinet.
Auxiliary contacts and alarm switching
This variant ships with two auxiliary switches, one trip alarm switch, and one electrical alarm switch (HQ type). That gives you a dedicated signal for remote status — breaker open/closed, trip event, and a separate alarm contact for SCADA or a local beacon. The auxiliary release is a shunt trip (STL) only; there is no undervoltage release, no communication module, and no phase-failure detection built in. If you need UVR or ground-fault monitoring, you are looking at a different suffix.
Dimensions and panel fit
The breaker measures 105 mm wide, 181 mm high, and 86 mm deep. That width is standard for a 3-pole 100 A frame in the 3VA platform — it fits the same mounting footprint as other 3VA100/160 frame breakers. The depth of 86 mm includes the handle and the shunt trip projection; allow clearance for wiring and the auxiliary contact block on the side.