Abstract: A device, for protecting electrical equipment and appliances from electrical surges, having: male prong members to connect the device to an electrical outlet; a female receptacle to receive a plug of the equipment or appliance; current diverting means including a varistor and thermofuse for interrupting current at the female receptacle upon the occurrence on the line feeding the outlet of transient voltage spikes and surges exceeding a predetermined voltage level. The electrical outlets include power outlets and telephone connectors of the multi-prong or coaxial type. Equipment which may be protected by an embodiment of this device includes devices e.g. recorders, computer terminals, which may be connected to the telephone lines.

Abstract: A device for protecting electrical appliances from electrical surges having male plug members to connect the device with a wall receptacle; a female receptacle to receive a plug of the appliance; a self-restoring, current interrupting means for diverting current from the female receptacle at a predetermined voltage level.

Abstract: A device for protecting electrical appliances from electrical surges having male prong members to connect the device to an electrical wall outlet; a female receptacle to receive a plug of the appliance; a self-restoring, current diverting spark gap means for interrupting current at the female receptacle at a predetermined voltage level.