5V RELAY 8A OMRON G2RL-2
Manufactured by Omron as their part number G2RL-2, these are a useful compact relay with a 5V coil and a pair of double pole change over contacts, rated at 8A 250VAC.
Dimensions are roughly 29mm x 12mm x 15mm plus the connections which are solder pins.
Priced and supplied individually.