Visual Verification – What to Check on Arrival
The 5SY4420-7: Fake until proven real – start with the sealable housing and the halogen-free marking. Both are factory-identifiers that re-markers routinely omit. The product designation and brand should be laser-engraved, not ink-stamped; surfaces must be free of solvent wipe marks. The 76 mm depth and 72 mm width correspond to 4 modular units on a DIN rail – a common footprint. Cross-check the physical dimensions against the labelled value; any deviation suggests a re-label from a smaller-frame part.
Panel Fit & Derating
Mounts in any position and uses the quick assembly system. The part is silicon-free – no risk of silicone outgassing near sensitive contacts or optics.
Compliance & Sourcing
Designed to IEC/EN 60898-1, IEC/EN 60947-2, and UL1077 – covers both domestic and light-industrial installations. No official L* successor is available; verify qty and lead time with your distributor before committing to a BOM line.