What this 3VA1110-6EF36-0AF0 brings to the panel
The Siemens SENTRON 3VA1110-6EF36-0AF0 is a 3-pole molded case circuit breaker (MCCB) rated for 100 A continuous current, built for line protection in distribution panels. It carries a TM240 thermal-magnetic overcurrent release — that means the thermal element handles overloads and the magnetic trip handles short-circuits, no electronic adjustment, just reliable bimetal-and-solenoid action. The real story here is the interrupting capacity: 220 kA at 240 V, 154 kA at 415 V, 121 kA at 440 V, and still 17 kA at 690 V. That kind of fault-clearing muscle at the lower voltages makes this breaker a solid choice for high-fault-current points in the network, like a main or a large feeder, where you need selectivity without cascading upstream. At 100 A it holds that rating from 40 °C right up through 50 °C, then starts a gentle derating curve — 96 A at 55 °C, 94 A at 60 °C, 92 A at 65 °C, and 90 A at 70 °C. If your panel runs hot near the top of that range, you still have 90 A of continuous capacity, which is better than a lot of breakers that drop off faster. The 800 V rated insulation voltage (Ui) gives headroom for 480 V and 600 V class systems without worrying about creepage.
Mechanical and environmental fit
Dimensions are 130 mm tall, 76.2 mm wide, and 70 mm deep — a standard MCCB footprint that fits most panel layouts without surprises. The front face carries an IP40 protection class, meaning it's protected against tools and small wires entering the front, but it's not sealed against moisture; keep it inside a panel enclosure rated for the environment. Operating temperature range is -25 °C to 70 °C, with storage from -40 °C to 80 °C, so it handles cold warehouses and warm control rooms equally well. Mechanical endurance is rated at 15,000 operations — not a daily-switch duty cycle, but fine for a breaker that mostly sits closed and only opens on fault or maintenance.