What the ratings mean for fit
The 3VA1132-4EF32-0HC0: The 32 A continuous rating holds flat from 40 °C to 50 °C, then derates to 30.72 A at 55 °C, 30.08 A at 60 °C, 29.44 A at 65 °C, and 28.8 A at 70 °C. If the panel ambient runs above 50 °C, the breaker's effective ampacity drops — size the branch circuit for the derated value, not the nameplate 32 A. The 121 kA at 240 V means it safely interrupts fault currents up to that level without upstream cascading; at 690 V the same breaker handles 11.9 kA, so verify the available fault current at the point of installation. Rated insulation voltage Ui is 800 V, and the front face carries IP40 protection — suitable for enclosed panel mounting where tools or fingers are unlikely to contact live parts. The 70 mm depth and 76.2 mm width fit standard DIN-rail or screw-mount footprints; the 130 mm height leaves clearance for busbar connections in a typical distribution board.
Auxiliary and release configuration
This variant includes a shunt trip (STL) auxiliary release and two high-quality auxiliary switches (2 auxiliary switches HQ). The integrated auxiliary trip is order code 3VA9688-0BL30. There is no undervoltage release, no ground-fault monitoring, no phase-failure detection, and no communication function — it is a straightforward line-protection breaker with remote trip capability via the shunt release.