Thunder Precision Resistor Co., Ltd. makes high end RRX series fusible wire wound resistors for more than 10 years.  These fusible wire wound resistors are designed as fusible safety resistor (or, AC mains input resistors) in electric appliances and energy meters. The specially selected resistive winding wire and special non-flammable silicon cement coating material are adopted to ensure safe and silent fusing operation without flame and immediate interruption in overload conditions. Wide range of overload currents is available upon request.