The Siemens SENTRON 3VA1010-3ED36-0AC0 is a 3-pole molded case circuit breaker (MCCB) rated for 100 A continuous current at 40 °C, with a TM210 thermal-magnetic overcurrent release. It carries a 75.6 kA interrupting rating at 240 V, 52.5 kA at 415 V, and 32 kA at 440 V — numbers that tell you where this breaker lives: it's sized for high-fault commercial and industrial distribution panels where the available short-circuit current is substantial. The interrupting capacity drops to 7.5 kA at 690 V, so if you're on a 690 V line, this is not the breaker for that bus. Rated insulation voltage Ui is 800 V, and the operating temperature range is -25 °C to 70 °C, with storage from -40 °C to 80 °C. The front face carries IP40 protection — fine for a clean indoor panel, not for washdown zones. It ships with 2 auxiliary switches (HQ type) pre-installed, which is a time-saver on the panel build: no separate add-on order, no wiring guess on the aux contact block.
Thermal derating and panel fit
The 100 A rating holds flat from 40 °C to 50 °C, then tapers: 96 A at 55 °C, 94 A at 60 °C, 92 A at 65 °C, 90 A at 70 °C. If your panel ambient runs above 50 °C, you lose 4–10 A of headroom — factor that into the load schedule. The breaker body is 76.2 mm wide, 130 mm tall, and 70 mm deep, which is the standard SENTRON 3VA fixed-panel footprint. It mounts on a DIN rail or directly to a backplate via the integral lugs; the 70 mm depth leaves clearance for a standard 200 mm deep enclosure without crowding the gland plate.