NAIS DS2E-S-DC12V RELAY
Manufactured by NAIS (Panasonic) as their part DS2E-S-DC12V these are a 12V coil miniature power relay rated upto 2A at 30VDC, with double pole double throw closed contacts.
Marketed by RS as catalogue number 127-8872
Dimensions are roughly 20mm x 11mm x 10mm