Shop name:Chong Qing Shuo Yue Ke Ji You Xian Gong Si WMF21 series thermistors are used for limiting the Inrush Current in the supply loop of kinds of supply, ballast / CFL etc. and the heating loop of CRT of color TV / monitor, heater, filament etc. The WMF21 series thermistors is the leads resin coating type products, it has the characteristic of small bulk, high , strong limiting of inrush current, quick response, long life, high reliability, etc. The temperature is decreased while the Material (B) of thermisters is increasing and the Remain Resistance is decreasing. The higher is the Thermal Capacity, the stronger is the capability of limiting the Inrush Current. It is direct proportion to the product of the Thermal Time Constant (T) and Thermal Dissipation Constant (d) . The WMF21 series thermistors has so wide application area, which is mainly used in Switching Supply, UPS Supply, CFL, Ballast, Circuitry of Supply, etc. Colour:black material:metal package contents: 1*thermistor Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.