The Siemens SENTRON 3VA2010-5HN32-0KC0 is a 3-pole molded case circuit breaker (MCCB) rated for 100 A continuous current across the full operating temperature range from 40 °C to 70 °C — no derating needed up to that ceiling. It's built for line protection duty, meaning it sits on the feeder side of a panel, not downstream on a motor branch. The interrupting ratings climb to 187 kA at 240 V and 121 kA at 415 V, so it handles high-fault utility feeds without cascading upstream. That 100 A frame with full-temperature rating is the spec that decides fit for a 100 A bus or subfeed — if your load calculation lands at 100 A, this holds it all day.
Panel fit and footprint
Dimensions are 105 mm wide, 181 mm tall, 86 mm deep — a standard 3-pole MCCB footprint that drops into most SENTRON panelboards and DIN-rail adapter kits. The 86 mm depth leaves room for rear bus connections without crowding the gland plate. Shunt trip (STL) and two auxiliary switches (HQ) are built in, so you don't lose side space for add-on modules.
Interrupting capability across voltages
The interrupting ratings step down with system voltage: 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 3 kA at 690 V. That 3 kA at 690 V is the weak point — if your 690 V bus has more than 3 kA available fault current, this breaker won't clear it. Most 690 V industrial systems run well above that, so verify the available fault current at the point of installation. The 100 A continuous rating holds steady across the full -25 °C to 70 °C operating range, with max power loss of 13.5 W.