What this MCCB carries and where it lands
The 3VA1110-6EF36-0AB0 is a Siemens SENTRON molded case circuit breaker designed for line protection. It is a 3-pole unit rated 100 A at 40 °C, with a TM240 thermal-magnetic overcurrent release. The breaking capacity sits at 220 kA at 240 V, 154 kA at 415 V, and 121 kA at 440 V — numbers that tell you it handles high-fault scenarios like transformer secondaries or large motor branch circuits where available fault current is serious. At 500 V and 690 V the rating drops to 17 kA, so verify your system voltage against that curve before committing the BOM line. Rated insulation voltage is 800 V, and the breaker carries two auxiliary switches (HP type) for status feedback to a PLC or annunciator. The supplied basic switch is order code 3VA11106EF360AA0, which means the breaker ships with that internal mechanism pre-installed — you are not ordering a bare frame and a separate trip unit.
Thermal derating — the real-world current you get
The 100 A rating holds from 40 °C through 50 °C. At 55 °C it drops to 98 A, at 60 °C to 96 A, at 65 °C to 94 A, and at 70 °C to 91 A. If your panel ambient runs hot — say near a drive cabinet or in a non-conditioned electrical room — size the load so the continuous current stays under the derated figure for your actual enclosure temperature. The breaker's maximum power loss is 25 W, which factors into the thermal budget of a tightly packed panel.
Physical fit and mounting
The breaker measures 130 mm high, 76.2 mm wide, and 70 mm deep. That 70 mm depth is the body only — you need additional clearance for the arc chute exhaust and cable bending radius. It mounts on a DIN rail or directly to a backplate via the screw terminals. The width of 76.2 mm (3 inches) is standard for a 3-pole frame in this class, so it drops into a panel cutout or busbar layout that was dimensioned around a typical 100 A MCCB without surprises.