SENTRON 3VA1110-4EF36-0KC0 — 100 A MCCB for Line Protection
The Siemens SENTRON 3VA1110-4EF36-0KC0 is a 3-pole molded case circuit breaker (MCCB) rated for 100 A at 40 °C, designed for line protection in distribution panels. It carries a 121 kA breaking capacity at 240 V AC, dropping to 75.6 kA at 415 V and 52.5 kA at 440 V — figures that tell you the interrupting capability at your service voltage. The 800 V rated insulation voltage gives headroom for 690 V systems. This breaker ships with a shunt trip release (STL) and two HQ auxiliary switches factory-fitted. No undervoltage release, no ground-fault monitoring, no communication module — it's a straight line-protection device. The 25 W maximum power loss matters for enclosure thermal calculations if you're packing multiple breakers in a small cabinet.
Current Derating and Thermal Performance
Rated current holds at 100 A from 40 °C through 50 °C (–). At 55 °C it drops to 98 A, then 96 A at 60 °C, 94 A at 65 °C, and 91 A at 70 °C (–). The operating temperature range is -25 °C to +70 °C (–). If your panel ambient runs above 50 °C, size the upstream protection for the derated figure, not the nameplate 100 A.
Breaking Capacity by Voltage — What It Means for Selectivity
The 121 kA at 240 V is the headline number, but the 75.6 kA at 415 V and 52.5 kA at 440 V are the ones that govern most industrial panels. At 500 V and 690 V the capacity plateaus at 11.9 kA (–). For a 400 V service with a transformer capable of 65 kA fault current, this breaker clears it with margin. Below 415 V the 75.6 kA figure supports selective coordination with downstream 25 kA or 36 kA rated MCBs, provided the let-through energy curves overlap correctly.
Panel Fit and Mounting
Dimensions are 130 mm height, 76.2 mm width, 70 mm depth (–). The 3-pole footprint matches standard SENTRON 3VA mounting rails and busbar systems. The 70 mm depth is shallow enough for 200 mm deep enclosures with the door closed. No DIN-rail clip — these bolt directly to the mounting plate or plug onto a busbar adapter.