What the 75.6 kA interrupting rating means for your panel
The Siemens 3VA1010-3ED32-0AA0 is a SENTRON 3-pole molded case circuit breaker (MCCB) rated for 100 A continuous current and a maximum interrupting capacity of 75.6 kA at 240 V AC. At 415 V it still handles 52.5 kA, and at 440 V it drops to 32 kA, so the voltage on your line determines how much fault current this breaker can interrupt. The TM210 overcurrent release is a thermal-magnetic trip unit — thermal for overload protection (the bimetal curve), magnetic for short-circuit instant trip. This is line-protection design, meaning it's intended for feeder or distribution circuits, not motor-starting duty where you'd want a motor-protective breaker with adjustable magnetic pickup. If you're protecting a motor branch, you'd want a different release type; for a panel feeder or a sub-distribution board, the TM210 is the right fit.
Thermal derating — what the 100 A rating actually delivers
Above that, the breaker derates: 98 A at 55 °C, 96 A at 60 °C, 94 A at 65 °C, and 91 A at 70 °C. That derating curve is built into the thermal-magnetic release, so you don't have to apply an external factor; the breaker's own bimetal will respond to the ambient temperature and trip earlier.
At 76.2 mm wide, 130 mm tall, and 70 mm deep, this MCCB fits a standard 3-pole MCCB footprint on a DIN rail or panel-mount base.
