WAttenuator (electronics)
WElectrical ballast
WElectronic color code
WList of electronic color code mnemonics
WForce-sensing resistor
WIron–hydrogen resistor
WL pad
WLiquid rheostat
WMöbius resistor
WPhotoresistor
WΠ pad
WPotentiometer
WPull-up resistor
WResettable fuse
WResistor
WT pad
WThermistor
WTrimmer (electronics)
WVaristor
WZero-ohm link