Breaking capacity and compliance
The 5SY4420-5: Tripping characteristic A. Neutral conductor not switched.
Physical fit and peer similarity
Width is 72 mm (4 width units), depth 76 mm, installation depth 70 mm — standard for the 5SY4 family. Mounts on DIN rail via the quick-assembly system, any position, sealable for tamper resistance. The footprint is identical to peers 5SY4463-8, 5SY4350-5, and 5SY4406-7, so swapping across those ratings within the same panel layout is possible provided the electrical ratings match the application. IP20 protection with connected conductors; halogen-free and silicon-free construction. Combined terminals top and bottom accept standard copper conductors. Operating temperature range -40 °C to 75 °C, derated at high humidity according to the curves (95% RH up to 55 °C, 55% up to 70 °C, 35% up to 75 °C).