MCCB for high-fault panel feeds
The Siemens SENTRON 3VA2110-5HL36-0BA0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection, carrying a continuous current Iu of 100 A at 40 °C. Its interrupting capacity hits 187 kA at 240 V AC and 121 kA at 415 V AC — figures that place it squarely in high-fault-duty panels where upstream transformer or bus faults could otherwise cascade. The ETU320 electronic trip unit provides adjustable overload and short-circuit protection curves, and the built-in undervoltage release (UVR) lets safety circuits or emergency-stop chains drop the breaker without a separate shunt trip module.
Breaking capacity across voltage levels
The 187 kA at 240 V is the headline number, but the real-world selectivity story is at 415 V and 440 V, where it still holds 121 kA — enough to coordinate with most downstream distribution breakers in a 400 V industrial panel. At 500 V the rating drops to 79 kA, and at 690 V it falls to 4.25 kA, so this frame is not intended for 690 V main feeds; that's a motor-circuit or sub-distribution role at the lower end of the voltage range.
Thermal derating and panel fill
The breaker holds 100 A from 40 °C through 50 °C, then derates linearly to 85 A at 70 °C. In a sealed, non-ventilated enclosure with other heat sources, that 70 °C ambient is reachable — plan for the 85 A floor if the panel runs hot. Physical footprint is 105 mm wide, 181 mm tall, and 86 mm deep, which fits standard SENTRON 3VA mounting plates and busbar adapters. The 12.5 W maximum power loss at rated load matters for thermal calculations in a dense panel.