The sources disagree on contact ratings, temperature limits, and package dimensions across SRD versions. I’ll make those differences explicit and keep the guide’s verified ratings tied to the attached datasheet, rather than treating every SRD variant as interchangeable.
The Songle SRD-05VDC-SL-C is a sealed, non-latching SPDT (1 Form C) PCB relay with a nominal 5 VDC, approximately 0.36 W coil. It is commonly used to let a low-voltage controller switch an independently powered load through electrically separate contacts.
Scope and source qualification: This guide uses the older Songle SRD datasheet attached to this project for verified electrical ratings. The manufacturer's website confirms the SRD family, but a direct current manufacturer-hosted PDF was not obtained. Distributor listings and newer Songle-branded sheets differ on contact ratings, dime...
Created the cited SRD-05VDC-SL-C Application and Usage Guide in the project files, covering all seven requested sections. It explicitly flags conflicting datasheet versions, unresolved footprint dimensions, and replacement limitations—no drop-in equivalent was verified. Before production, the priority is to confirm the supplied variant’s drawing and load ratings, then qualify an active second source.