The Siemens 3VA1110-6EF32-0DH0 is a SENTRON molded case circuit breaker (MCCB) designed for line protection in distribution panels. It carries a 100 A rating at 40 °C ambient — that's the continuous current it handles without tripping in a typical 40 °C panel environment. The 220 kA breaking capacity at 240 V means it can safely interrupt a fault current up to that level without welding contacts or cascading failure upstream; at 415 V the rating is still 154 kA, and at 690 V it holds 17 kA. That's a high-interrupting-capacity (HIC) frame suited for transformer secondaries or main feeders where available fault current is substantial.
Ratings and what they mean for fit
Three poles, 100 A continuous at 40 °C through 50 °C — no derating needed up to that point. 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 the panel ambient runs hot, size the load accordingly. The rated insulation voltage is 800 V, so the breaker's internal clearances are designed for 690 V systems with margin. Power loss at full load is 27.5 W maximum — that's heat that stays inside the enclosure, so factor it into your thermal budget if the panel is tightly packed. This variant includes an undervoltage release (UVR) — if control voltage drops below the dropout threshold, the breaker trips. That's a common requirement for safety circuits or emergency-stop chains where loss of control power must open the main feeder. It also carries two auxiliary switches plus a separate trip-alarm switch (HQ), so you get position feedback and a dedicated signal for fault events without adding external relays.
Panel fit and integration
Dimensions are 130 mm high, 76.2 mm wide, 70 mm deep — a standard 3-pole MCCB footprint that mounts on a DIN rail or directly to a backplate via screw terminals. The 70 mm depth (2.76 in) is the projection from the mounting surface; check clearance against the enclosure door or busbar shroud. The width of 76.2 mm (3 in) matches the typical 3-pole SENTRON frame spacing, so it drops into an existing panel layout without re-drilling.