What the 100 A rating means for your panel
The Siemens 3VA1110-5EE32-0AA0 is a SENTRON 3-pole molded case circuit breaker rated 100 A continuous at 40 °C ambient, with a TM220 thermal-magnetic release for line protection. That 100 A holds flat through 50 °C — only starts derating at 55 °C (98 A) and drops to 91 A at 70 °C, so in a warm enclosure you still have most of the headroom. The interrupting capacity is the headline: 187 kA at 240 V, 121 kA at 415 V, 75.6 kA at 440 V, and 17 kA at 500 V and 690 V. That means it can clear a fault on a high-capacity transformer secondary without upstream fuses needing to coordinate — useful for main or feeder duty in a distribution panel.
DIN-rail footprint and panel fit
The 3VA1110-5EE32-0AA0 measures 70 mm deep by 76.2 mm wide by 130 mm tall — a standard 3-pole MCCB footprint that clips onto a DIN rail. The IP40 front protection means it's fine inside a closed panel but not for washdown zones. Rated insulation voltage is 800 V, so it's comfortable on 480/600 V systems with margin.
What the TM220 release and lack of trip indicator mean
The TM220 designation means a thermal-magnetic trip with a fixed thermal curve and magnetic pickup — standard for line protection where you need overload and short-circuit protection in one device. There's no trip indicator (mechanical flag) on this variant, so a remote indication or visual check at the breaker face won't show a tripped state. No undervoltage release, no ground-fault monitoring, no communication function — this is a straight electromechanical breaker for basic feeder or branch protection.