What this MCCB delivers
The Siemens SENTRON 3VA1110-3FE42-0AA0 is a 4-pole molded case circuit breaker rated for 100 A continuous current (Iu) with a TM220 thermal-magnetic release. Its interrupting capacity hits 75.6 kA at 240 V and 52.5 kA at 415 V — enough to clear high-fault conditions on a distribution bus without upstream coordination headaches. The 100 A rating holds flat from 40 °C to 50 °C, then derates gradually to 91 A at 70 °C, so a panel running at 45 °C gets the full 100 A. Rated insulation voltage is 800 V, and it accepts up to 600 V DC for those mixed AC/DC bus applications.
Fit and panel integration
Footprint is 101.6 mm wide by 130 mm tall by 70 mm deep — a 4-pole MCCB that fits standard Siemens SENTRON mounting bases. IP40 on the front means it's protected against tools and wires entering the enclosure, but it's not sealed against washdown; keep it inside a panel. The N-conductor protection is set to 50%, typical for 4-pole breakers on TN or TT systems where the neutral is not fully rated. Optional motor drive allows remote tripping or reset — useful for unattended switchgear.
What the ratings mean for your BOM
The 100 A frame with TM220 release is sized for feeder or large branch circuits in commercial and industrial distribution. The 75.6 kA at 240 V tells you it can sit downstream of a transformer with high fault current without needing a current-limiting fuse upstream — that's a panel-space saver. At 415 V it still interrupts 52.5 kA, so it handles most 400 V distribution bus faults. The 4-pole version means it switches all three phases plus neutral, which is required for some generator paralleling or IT system designs.