125 A MCCB with 220 kA interrupting capacity — line protection for high-fault panels
The Siemens 3VA1112-6EF36-0AE0 is a SENTRON 3-pole molded case circuit breaker (MCCB) rated for 125 A continuous at 40 °C, with a thermal-magnetic TM240 release designed for line protection in distribution panels. Its interrupting capacity reaches 220 kA at 240 V, 154 kA at 415 V, and 75.6 kA at 440 V — figures that handle high available fault current without cascading upstream breakers. The 800 V rated insulation voltage and 28.1 W maximum power loss suit it for enclosed panel mounting where thermal management matters.
Current derating and thermal profile
Continuous current holds at 125 A from 40 °C through 50 °C, then derates to 122 A at 55 °C, 120 A at 60 °C, 117 A at 65 °C, and 114 A at 70 °C (–). Operating ambient range is -25 °C to +70 °C; storage range is -40 °C to +80 °C. The 70 mm depth, 76.2 mm width, and 130 mm height (–) match the standard 3VA1 DIN-rail footprint — panel cutouts and busbar spacing carry over from other 3-pole SENTRON breakers.