PolySwitch™ PTC Devices RHEF Series Approvals UL, CSA, TUV PCB Wire Ended Resettable fuses with radial leads that offer the following: All are UL, CSA, TUV approved Protection of electrical and electronic circuits against excessive currents Rapid switch from low resistance state to very high resistance with electrical overload or short circuit Quick and automatic reset and return to low resistance state when fault condition corrected and power removed Features: Automatically resets itself thousands of times Maintenance free Small size and no fuseholder required Main applications: Security systems Power supplies and transformers Power switching devices Automotive and medical equipment Instrumentation and control Computers and peripherals Audio visual and telecommunications