This part is a kind of semiconductor called 14D220K.

Function of this product has (14DxxxK) Zinc Oxide Varistor.

Manufacturers : Elecsound

Image and pinout :

Some of the text within the PDF file :

Zinc Oxide Varistor 14mm Zinc Oxide Varistor Elecsound Varistor is a voltage dependent resistor. Which have symmetrial voltage-current characteristics and unparalleled large peak current capability are used for absorption of transient voltage, suppression of pulse noise and circuit voltage stabilization. 1 Features Low leakage current Excellent voltage ratio. Wide voltage. Fast response time. 2 Application Ic semiconductor protection. Surge voltage protection in communication, measuring, and controller elecronics. Surppression of main borne transients in industrial electronics and consumer electronics. 3. Dimensions http:/// 4. Approval: Elecsound Products: Trimming potentiometers, Leds, pcbs, capacitors, varistors, resistors Elecsound Electronics Company Limited Te [ ... ]

14D220K PDF Datasheet Download