The Siemens SENTRON 3VA1110-3EE36-0AA0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection. It carries 100 A continuously at 40 °C ambient, with a TM220 thermal-magnetic overcurrent release — the thermal element handles overloads, the magnetic element clears short-circuits. Breaking capacity reaches 75.6 kA at 240 V AC, 52.5 kA at 415 V, and 32 kA at 440 V, so it handles high-fault utility feeds or large transformer secondaries without cascading upstream. Rated insulation voltage is 800 V, and the front face carries IP40 protection — suitable for installation inside a panel enclosure where dust ingress is limited. The breaker measures 130 mm high, 76.2 mm wide, and 70 mm deep, fitting standard SENTRON 3VA mounting footprints.
Current derating and thermal limits
The 100 A rating holds from 40 °C up to 50 °C without derating. Above that, the continuous current drops linearly: 98 A at 55 °C, 96 A at 60 °C, 94 A at 65 °C, and 91 A at 70 °C. If the breaker sits in a warm cabinet or near other heat sources, use the 70 °C column (91 A) for the realistic continuous load. Maximum power loss is 25 W at rated load — a figure to budget for in enclosed panel thermal calculations. Operating ambient range is -25 °C to +70 °C; storage range is -40 °C to +80 °C.