Abstract: Apparatus provide protection for the power input of DC-powered equipment so that transients from a DC power supply do not cause equipment damage leading to spontaneous or eventual failure. The apparatus may include energy absorbing components that provide a closed or short circuit upon a voltage exceeding a threshold being output by the DC power supply, and the closed circuit directs energy away from the DC-powered equipment to prevent the excess voltage or energy from causing damage. The electrical pathway of the energy absorbing components may be unfused so that an alarmable fuse of the DC power supply may be blown by a sustained overcurrent condition and an alarm is triggered to indicate the occurrence of the DC power event. Additionally, the apparatus may be mounted to a rail near the protected equipment or may alternatively be strapped to nearby wiring.