Siemens SENTRON 3VA1020-4ED36-0CA0 — 20 A MCCB with TM210 Release
Its interrupting capacity reaches 121 kA at 240 V, 75.6 kA at 415 V, and 52.5 kA at 440 V — figures that govern selectivity coordination in a distribution board. An undervoltage release is included; no trip indicator or communication function is fitted.
Interrupting Capacity and Thermal Derating
At 415 V the rating drops to 75.6 kA, at 440 V to 52.5 kA, and at 500 V and 690 V it holds at 11.9 kA. The continuous current rating is 20 A from 40 °C through 55 °C ambient; at 60 °C it derates to 19 A, and holds at 19 A through 70 °C. This thermal curve means the breaker can be applied in a warm enclosure without forced cooling, as long as the load stays at or below the derated figure.
The 3VA1020-4ED36-0CA0 measures 76.2 mm wide, 130 mm high, and 70 mm deep. The undervoltage release (fitted as standard) must be wired to the control voltage; verify polarity and coil rating against the panel's control transformer before commissioning.