... supply loop of every kinds of power supply, ballast / CFL etc. and the heating loop of CRT of ... mainly used in Switching Power Supply, UPS Power Supply, CFL, Ballast, Circuitry of Power Supply, etc.WMF21 series NTC ... supply loop of every kinds of power supply, ballast / CFL etc. and the heating loop of CRT of ... in Switching Power Supply, UPS Power Supply, CFL, Ballast, Circuitry of Power Supply, etc.