The Siemens 3VA1110-6FD42-0AA0 is a SENTRON molded case circuit breaker (MCCB) rated for line protection, carrying 100 A continuously at 45 °C and 50 °C, with a thermal-magnetic TM210 overcurrent release. Four poles handle three-phase plus neutral, with the neutral conductor protection set at 50 % of the phase rating. This is the high-interrupting-capacity variant: 220 kA at 240 V, 154 kA at 415 V, 121 kA at 440 V, and still 17 kA at 500 V and 690 V — numbers that put it squarely in the heavy industrial fault-current class, not a light commercial MCCB.
Current derating and thermal behaviour
Above that, the thermal curve is published: 98 A at 55 °C, 96 A at 60 °C, 94 A at 65 °C, 91 A at 70 °C.
Breaking capacity by voltage — what it means for selectivity
At 415 V (common in IEC 50 Hz industrial plants) the 154 kA still covers the vast majority of installations. The drop to 17 kA at 500 V and 690 V is the key constraint: if your system runs 690 V with a high transformer kVA, verify the available fault current at the point of installation stays under 17 kA, or step up to a higher-frame 3VA variant.
The 3VA1110-6FD42-0AA0 measures 130 mm high, 101.6 mm wide, and 70 mm deep. The 4-inch (101.6 mm) width is the standard 4-pole MCCB footprint for the 3VA frame — it occupies the same panel cutout as other 3VA 4-pole units. The design accepts an optional motor drive (Product Extension entry confirms Yes), so remote trip or reclose via a motor operator is possible without changing the breaker frame.