Siemens SENTRON 3VA1020-3ED32-0AA0 — 20 A MCCB with TM210 release
Rated insulation voltage Ui is 800 V, and the maximum power loss is 12 W. The front face carries IP40 protection — suitable for enclosed panel mounting where the breaker is not exposed to dust or moisture ingress.
Breaking capacity across common system voltages
Breaking capacity is voltage-dependent: 75.6 kA at 240 V AC, 52.5 kA at 415 V, 32 kA at 440 V, and 7.5 kA at both 500 V and 690 V. These figures define the maximum fault current the breaker can safely interrupt at each voltage level — critical for selectivity studies and SCCR compliance in a distribution panel.
Thermal derating and operating range
The breaker holds its full 20 A rating from 40 °C up to 55 °C. At 60 °C and 65 °C it derates to 19 A, and at 70 °C it remains at 19 A. The operating temperature range is -25 °C to +70 °C; storage range is -40 °C to +80 °C. This means the 20 A rating is maintained across typical panel ambient conditions — no derating needed unless the enclosure runs above 55 °C.
Physical fit and mounting
Dimensions: 130 mm height, 76.2 mm width, 70 mm depth. The 3-pole width (76.2 mm) is standard for this frame size — it fits the same DIN-rail or screw-mount footprint as other 3VA 3-pole units. No neutral conductor upgrade or motor drive option is fitted on this variant.