What this MCCB is and what it carries
The Siemens 3VA1010-3ED32-0BC0 is a SENTRON molded case circuit breaker (MCCB) rated for line protection — meaning it sits upstream protecting a feeder or distribution bus, not a specific motor or load. It's a 3-pole unit rated for a continuous current of 100 A at 40 °C, and it holds that full 100 A all the way up to 50 °C before it starts to derate (96 A at 55 °C, 94 A at 60 °C, 92 A at 65 °C, 90 A at 70 °C). That thermal curve is what you check when the panel ambient runs hot — if your enclosure hits 60 °C, you're still good for 94 A continuous. The overcurrent release is a TM210 — a thermal-magnetic type with a fixed thermal pickup and a magnetic short-circuit trip set at 10× In (1000 A). That's a standard distribution release curve, not the adjustable electronic kind you'd find on a selective or motor-protection variant. For the short-circuit side, the breaker is rated for 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 7.5 kA at 690 V — those are the interrupting capacities at each voltage level, and they tell you whether this breaker clears a fault before the upstream device has to act. The rated insulation voltage is 800 V, so it's rated for 690 V systems with margin. It ships with an integrated undervoltage release (UVR) as standard — that's the / entry: the coil drops the breaker if control voltage is lost, which is common on emergency-stop circuits or mains-monitoring schemes. The auxiliary contact block is a 2-switch HQ version, meaning two form-C contacts for status feedback to a PLC or panel lamp. No voltage trigger, no communication module, no ground-fault monitoring — this is a straightforward distribution breaker, not a smart or metering unit.
Panel fit and integration notes
Dimensions are 130 mm height, 76.2 mm width, 70 mm depth. It mounts on DIN rail or screw-fixed to a backplate; IP40 front protection. Operating temperature range is -25 °C to +70 °C, storage from -40 °C to +80 °C. Mechanical endurance is 15,000 operations.