What this 3VA2110-5HL42-0AA0 is and what it does
The Siemens 3VA2110-5HL42-0AA0 is a SENTRON molded case circuit breaker (MCCB) designed for line protection in distribution panels. It carries a continuous rated current of 100 A across the full ambient temperature range from 40 °C to 70 °C, meaning no derating is needed even in a warm enclosure — the same 100 A holds at 70 °C ambient. The 4-pole configuration covers three-phase plus neutral, and the ETU320 electronic trip unit provides adjustable overload and short-circuit protection curves. Insulation voltage is rated 800 V, so it handles 400/480 V line-to-line systems with headroom.
Breaking capacity — what the numbers mean for coordination
This MCCB's interrupting capacity is 187 kA at 240 V AC, 121 kA at 415/440 V, 75.6 kA at 500 V, and 3.7 kA at 690 V. At typical 400 V distribution voltages, 121 kA SCCR means it can clear a fault up to that level without upstream breakers needing to trip — critical for selectivity in a main or feeder position. At 690 V the capacity drops to 3.7 kA, so if your system runs at that voltage, verify the available fault current stays under that ceiling.
Panel fit — dimensions and integration
At 181 mm high, 140 mm wide, and 86 mm deep, this 4-pole MCCB fits standard SENTRON mounting patterns. The front face carries IP40 protection — suitable for enclosed distribution boards where incidental tool contact is the only exposure. Power loss is 10 W maximum, so thermal rise inside a sealed panel stays manageable without forced cooling.