24V MINIATURE RELAY OMRON G6A-234P 

24V Coil miniature relay, low coil current - just 8.3mA to operate.
Double pole changeover contacts rated at 1Amp 30Vdc.

Manufactured by Omron as their full part number G6A-234P-STY15-24VDC.

 Dimensions are 20mm x 10mm x 8mm high.