The 3VA1220-5GF42-0AF0: The interrupting ratings climb high at lower voltages — 187 kA at 240 V, 121 kA at 415 V — and taper to 17 kA at 690 V. Thermal derating is gradual: it holds 200 A up to 50 °C, then drops to 194 A at 55 °C, 188 A at 60 °C, 182 A at 65 °C, and 176 A at 70 °C.
Panel fit and thermal management
Footprint is 140 mm wide by 158 mm tall by 70 mm deep — a 4-pole MCCB in a standard SENTRON 3VA frame.
The 3VA1220-5GF42-0AF0 carries a built-in auxiliary switch and trip alarm switch (1 AUX + 1 alarm HQ) as standard, per the design-of-auxiliary-switch field. That saves an external accessory slot on the side of the breaker.