What this MCCB delivers for your panel
The Siemens SENTRON 3VA2010-6HL32-0HL0 is a 3-pole molded case circuit breaker rated for 100 A continuous current at 40 °C, with a breaking capacity of 242 kA at 240 V AC — enough to handle high-fault utility feeds or transformer secondaries without cascading upstream. The ETU320 electronic trip unit provides adjustable overload and short-circuit protection; the shunt trip (STL) and auxiliary contact pack (2 auxiliary switches + 1 trip alarm + 1 electrical alarm) give you remote tripping and status feedback for PLC or SCADA integration.
Sizing and thermal derating
The breaker holds its full 100 A rating up to 50 °C ambient. Above that it derates linearly: 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 your panel runs hot — near a drive or transformer — factor the 70 °C ceiling into your load calculation. Maximum power loss is 13.5 W, manageable for standard enclosure thermal budgets.
Breaking capacity across voltages
Short-circuit performance varies with system voltage: 242 kA at 240 V, 187 kA at 415 V and 440 V, 121 kA at 500 V, and 4 kA at 690 V. The 690 V figure is low — verify your available fault current if the breaker is used on a 690 V line. Rated insulation voltage is 800 V, so the internal clearances are adequate for 690 V systems.
Panel fit and auxiliary wiring
Dimensions: 105 mm wide, 181 mm high, 86 mm deep. The 105 mm width is standard for a 3-pole MCCB in this class — it fits common DIN-rail or panel-mount cutouts. The auxiliary contact block (2 auxiliary switches + 1 trip alarm + 1 electrical alarm) and the shunt trip release are factory-integrated; no field assembly of add-on modules is required. The shunt trip allows remote opening via a control voltage, useful for emergency-stop circuits or PLC-based load shedding.