The Siemens SENTRON 3VA2110-5HL36-0AG0 is a 3-pole molded case circuit breaker (MCCB) rated for 100 A continuous current at 40 °C, carrying the same 100 A rating through 50 °C before the thermal derating curve begins — at 55 °C it's 96.25 A, at 60 °C it's 92.5 A, and at 70 °C it's 85 A. That means for a panel sitting at 50 °C ambient (common in a crowded enclosure), you still get full 100 A without oversizing the frame.
Sizing and integration into a DIN-rail enclosure
Maximum power loss is 10 W, which is modest for a 100 A frame — keep that in mind for thermal calculations in a sealed enclosure.
Sourcing this for a BOM line
The 3VA2110-5HL36-0AG0 is specified into the BOM as a line-protection MCCB with the ETU320 release. For a panel originally built around the 3VA1010-2ED36-0AC0, this 3VA2110 frame is a different physical size and trip unit generation; it will not drop into the same cutout without panel modification. The 3VA2110 is the larger frame for higher interrupting capacity and the electronic trip option.