What this 3VA1 carries
Its interrupting capacity shifts with system voltage: 220 kA at 240 V, 154 kA at 415 V, 121 kA at 440 V, and 17 kA at both 500 V and 690 V — so the same frame covers high-fault residential mains and lower-fault industrial feeders without a frame-size jump. Thermal derating is modest: full 40 A through 50 °C, then 39 A at 55–60 °C, 38 A at 65 °C, and 37 A at 70 °C. Power loss at rated load is 10.8 W maximum — useful to know for enclosure thermal calculations when grouping several breakers.
Auxiliary and release configuration
That gives you remote tripping capability and two separate signal paths for status feedback — one for the breaker position, one dedicated to the trip event.
Dimensions: 130 mm height, 76.2 mm width (3 in), 70 mm depth. The supplied basic switch is order code 3VA11406EF320AA0, which is the internal mechanism; the -0JH0 suffix specifies the factory-fitted shunt trip and auxiliary switch combination.