This post describes for the songle relay.
The Part Number is SLA-05VDC-S-L-C.
The function of this semiconductor is 5V, PCB Relay.
The manufacturer of this part is Songle
See the preview image and the PDF file for more information.
This is 5V, PCB Type, Songle Relay.
1. Up to 30A switching in SPST and 20A switching in spot arrangements.
2. Available as an open-frame relay, with a snap-on dust cover or with an immersion cleanable, plastic sealed case.
1. Used for power switching, Electrical Heater, ventilator, Air conditioning, Refrigerating, Automobile and House-hold Appliance.