The TM210 overcurrent release is a fixed thermal-magnetic type: the thermal element handles sustained overloads (inverse time), and the magnetic element clears short-circuit faults instantaneously. At 415 V the interrupting rating drops to 52.5 kA, at 440 V to 32 kA, and at 500/690 V to 7.5 kA; the SCCR rating at the applied voltage is what governs the panel label. Rated current holds at 20 A from 40 °C through 55 °C ambient; at 60 °C it derates to 19 A, and it stays at 19 A through 70 °C. That flat derating curve means the breaker is not thermally starved inside a warm enclosure — a common gotcha with breakers that derate steeply above 40 °C.
The 3VA1020-3ED42-0AA0 measures 130 mm high, 101.6 mm wide, and 70 mm deep.