The thermal-magnetic release (TM240) handles overloads and short-circuits; the thermal element responds to sustained overcurrent while the magnetic element clears fast faults. Breaking capacity is 187 kA at 240 V AC, 121 kA at 415/440 V, 75.6 kA at 500 V, and 11.9 kA at 690 V — those numbers tell you the maximum fault current the breaker can safely interrupt at each voltage level. It also includes two auxiliary switches plus a separate trip-alarm switch, so you get status feedback for both the breaker position and whether it tripped on fault.
The 3VA1332-5EF32-0KJ0 measures 248 mm high, 138 mm wide, and 110 mm deep — a standard MCCB footprint for 320 A frame size.
Maximum power loss is 80.1 W at rated load. That's dissipated as heat inside the enclosure — factor it into your panel cooling calculation, especially if the breaker is grouped with other heat sources. The rated current derates from 320 A at 40 °C to 292 A at 70 °C; the table shows 320 A holds steady through 50 °C, then drops by roughly 7 A per 5 °C step above that.