What this MCCB carries and where it fits
The Siemens 3VA1110-5GD42-0AA0 is a SENTRON molded case circuit breaker rated 100 A at 40 °C with a TM210 thermal-magnetic release. Four poles, line-protection duty. The interrupting ratings are the headline: 187 kA at 240 V AC, 121 kA at 415 V AC, 75.6 kA at 440 V AC, and 17 kA at 500 V and 690 V AC. That 187 kA figure at 240 V means it can clear a bolted fault on a high-capacity transformer secondary without the arc flashing over — real selectivity headroom for a main or feeder breaker in a panel fed by a 1000 kVA+ transformer.
Thermal derating and panel integration
The 100 A rating holds flat from 40 °C through 50 °C. At 55 °C it derates to 98 A, at 60 °C to 96 A, at 65 °C to 94 A, and at 70 °C to 91 A. That's a shallow derating curve — only 9 A lost over a 30 °C rise — so it keeps its full rating in most ventilated enclosures. The 70 mm depth and 101.6 mm width mean it fits a standard 4-pole MCCB slot on a DIN rail or panel-mount adapter. IP40 on the front; fine for a clean indoor panel, not for washdown.
What the TM210 release means for coordination
The TM210 is a thermal-magnetic release — fixed thermal pickup, fixed magnetic short-circuit pickup. No electronic adjustments, no communication module, no ground-fault monitoring. That makes it a straightforward line-protection breaker for feeder circuits where you don't need selective coordination curves or remote tripping. The 100% rated N-conductor protection (4-pole, all poles protected) suits it for 3-phase + neutral systems where the neutral carries load current.