The LSE240D12 from Crydom is single pole single throw SPST (1 Form A) solid state relay with NO contact configuration and PC pin termination. This relay has AC, zero cross output and 12A, 24 to 280V load ratings. Operates at input voltage range from 20 to 28VDC. Dimensions of this relay with heat sink are: 22.7 mm H x 13.1 mm W x 35.5 mm L.