What this MCCB delivers — and where the ratings matter
The Siemens SENTRON 3VA1110-6EF32-0KA0 is a 3-pole molded case circuit breaker (MCCB) rated for 100 A continuous current, with a TM240 thermal-magnetic overcurrent release. It is configured as a line protection device, meaning it guards feeders and downstream distribution against overloads and short circuits — not motor or generator protection. Breaking capacity is the headline: 220 kA at 240 V, 154 kA at 415 V, 121 kA at 440 V, and 17 kA at 690 V. These are high-interrupting ratings for a 100 A frame — the 220 kA figure at 240 V tells you this breaker is designed for high-fault locations like transformer secondaries or large busway taps where available fault current is severe. The 690 V rating (17 kA) confirms it can be used on 600 V class systems, though the interrupting margin is tighter there. Thermal derating is documented across the operating range: full 100 A from 40 °C through 50 °C, then 96 A at 55 °C, 94 A at 60 °C, 92 A at 65 °C, and 90 A at 70 °C. If this breaker lives in a non-air-conditioned enclosure near other heat sources, use the 60 °C or 70 °C column for your continuous load calculation — the 100 A nameplate only holds below 50 °C ambient. Rated insulation voltage is 800 V. Mechanical endurance is 15,000 operations. Front face carries IP40 protection.
Panel fit and integration notes
Dimensions: 76.2 mm wide, 130 mm high, and 70 mm deep. This unit ships without auxiliary contacts or a ground-fault module. The only integrated accessory is a shunt trip release (STL) — part number 3VA9688-0BL33 for the auxiliary trip assembly if you need remote tripping capability. No undervoltage release, no communication module, no phase failure detection. If your BOM calls for any of those, this is the base variant and you will need to add external components or select a different suffix.