Transformer-protection circuit breaker, Trip Class 10
Rated operating voltage spans 20 to 690 V, with a breaking capacity of 100 kA at both 240 V and 400 V, and 100 kA at 500 V. These figures define the fault-clearing capability for transformer primary-side protection — the 100 kA at 400 V covers most industrial distribution fault levels.
Width is 45 mm, depth 97 mm, height 97 mm. Required clearances: 50 mm upwards and downwards, 30 mm at the side, 0 mm forwards and backwards. The 45 mm width matches a standard 2-module DIN-rail footprint, so it fits in a typical panel layout without overhang. Terminals accept 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²) solid or stranded copper, with M3 screws for the main contacts. This covers standard control wiring sizes for transformer feeders up to the rated currents.