PURPOSE: To conduct miniaturization while enabling the reduction of noises by sharing an electronic type time switch and a part of the components of a DC power device and integrally housing the time switch and a part of the components in a case made of a synthetic resin.

CONSTITUTION: The principal section of an electronic time switch is composed of a power supply circuit 35 for controlling a device, a service interruption compensation circuit 10 and a time switch control circuit 36, and housed in a case made of a synthetic resin together with components such as an electromagnetic relay 16, a terminal block 17 for outputting a DC power supply, etc. A commercial power supply connected to a terminal block 3 for inputting an AC power supply is converted into specified DC low voltage and load is supplied with DC low voltage through the terminal block 17 for outputting the DC power supply, and the opening and closing of the electromagnetic relay 16 are controlled in response to a program set to the time switch control circuit 36 during the feed. Accordingly, the device can be miniaturized and cost thereof reduced while operation control, in which the output voltage is varied in response to the time, is conducted, thus ensuring clamping and lowering noises from internal structural parts in the noises of the load.