The TM210 thermal-magnetic release handles overload and short-circuit curves; the integrated shunt trip (STL) lets a remote signal or safety relay drop the breaker on demand.
This breaker's short-circuit rating is voltage-dependent — a key detail when the panel feeds multiple bus voltages. At 240 V it clears 121 kA; at 415 V that drops to 75.6 kA; at 440 V it's 52.5 kA; at 500 V and 690 V it holds at 11.9 kA. That 11.9 kA floor at 690 V still covers most motor-drive branch circuits.
Rated current is 20 A from 40 °C up through 55 °C, then derates to 19 A at 60 °C and 65 °C, and stays at 19 A at 70 °C. That's a shallow derating curve — useful in a crowded enclosure where ambient runs warm. Maximum power loss is 12 W, which matters for heat buildup in a sealed panel.
The 3VA1020-4ED32-0JA0 measures 130 mm tall, 76.2 mm wide, and 70 mm deep. Three-pole construction; the shunt trip (STL) requires a separate control voltage — no undervoltage release here, so verify the trip coil wiring if replacing a UVR-specified breaker.