The Siemens SENTRON 3VA1010-3ED32-0KC0 is a 3-pole molded case circuit breaker rated for 100 A continuous current with a TM210 thermal-magnetic overcurrent release. It carries a 75.6 kA interrupting capacity at 240 V, 52.5 kA at 415 V, and 32 kA at 440 V — numbers that tell you it handles high-fault utility feeds or transformer secondaries without cascading upstream breakers. The interrupting rating at 690 V drops to 7.5 kA, so if you're on a 690 V line, verify fault current doesn't exceed that. Rated insulation voltage is 800 V, and the frame holds the full 100 A from 40 °C up through 50 °C without derating; at 55 °C it's 96 A, at 60 °C it's 94 A, and at 70 °C it's 90 A. That flat curve up to 50 °C buys you headroom in a warm enclosure — a packed panel that hits 50 °C still lets you run the full 100 A through this breaker.
The 3VA1010-3ED32-0KC0 measures 70 mm deep by 76.2 mm wide by 130 mm tall, which is the standard 3-pole SENTRON 3VA1 frame width. It mounts on a DIN rail or can be screw-fixed to a backplate. IP40 on the front means it's protected against tools and wires over 1 mm, but it's not sealed against hose-down — keep it inside the enclosure, not on the panel door. The shunt trip (STL) and two auxiliary switches (HQ) are integrated; the auxiliary release order code is 3VA9688-0BL33 if you need a spare or a documented part number for the BOM.