What this 200 A MCCB carries and where it fits
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. That 187 kA figure at 240 V tells you this breaker is sized for high-fault panels where a standard 65 kA or 100 kA unit would not hold. The 800 V rated insulation voltage (Ui) confirms it is rated for 690 V line-to-line service in IEC systems. 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. If the panel ambient runs above 50 °C, the continuous load must be reduced by that curve — the breaker will not nuisance-trip, but the cable and bus must match the derated figure.
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. It mounts on a DIN rail or directly to a backplate via the screw terminals. The 42 W maximum power loss at rated current means the enclosure must vent that heat; in a sealed stainless panel above 50 °C, factor the derating curve into the busbar sizing. Operating temperature range is -25 °C to 70 °C; storage from -40 °C to 80 °C. That covers most indoor industrial environments, but if the breaker sits in an unheated enclosure in a northern climate, the -25 °C floor is the hard limit for closing and carrying current.
Sourcing and lifecycle posture
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.