Semiconductor relay

A semiconductor relay is equipped with two MOSFETs; a light emitting element; a light receiving drive element for separately switching the two MOSFETs on or off depending on the presence of light emitted by the light emitting element; two output conductive plates electrically connected to the two MOSFETs; two input conductive plates electrically connected to the light emitting element; and a sealing resin sealing the two MOSFETs, the light emitting element, the light receiving drive element, the two output conductive plates, and the two input conductive plates. The two output conductive plates and the two input conductive plates each have terminals protruding outside the sealing resin and mounted together on a common printed circuit board; the two output conductive plates each have mounts, on which one MOSFET each is mounted, and which are connected to the drain electrode of the MOSFET mounted thereon; and each of the mounts is separately sealed with the sealing resin in such a direction so that the thickness