RGEF900 Product Overview PolySwitch? RUEF & RGEF Series Printed Circuit Board End-of-Line Resettable Fuses with available Radial Leads have the following features: Fully UL, CSA, and TUV certified Protects electrical and electronic circuits from excessive currents Quickly switches from a low to a very high resistance state through an electrical overload or short-circuit. Quickly switches from low resistance to very high resistance through electrical overloads or short circuits Quickly and automatically resets and returns to low resistance after correcting fault conditions and turning power off Features: Thousands of automatic self-resets Maintenance-free Small size, no fuse holder required Major applications: Security systems Power supplies and transformers Power switching devices Automotive and medical equipment Instrumentation and controls Computers and peripherals Audio video and telecommunications.