This part is a kind of semiconductor called MYN15-221K.

Function of this product has MYN Series Metal Oxide Varistors.

Manufacturers : Chengdu Tieda

Image and pinout :

Some of the text within the PDF file :

Chengdu Tieda Electronics Co., Ltd. MYN Series Metal Oxide Varistors Ordering Code MY□ □□□ □□□ □ □ 1 2 3 4 5 1 – Series type: N – High Energy Radial Lead Metal Oxide Varistors 2 – Element size (Nominal diameter in mm): 09D(φ7mm), 12D(φ10mm), 15D(φ14mm), 23D(φ20mm) 3 – Varistor voltage: Operating voltage expressed by 2 significant figures: 1st and 2nd digit: the two significant figures of the operating voltage 3rd digit: the number of Zeros to be added to the operating voltage value. Example: 47V: 470 470v: 471 680V: 681 4 – Tolerance: J: ±5% K: ±10% 5 – Package: (where available) Blank = Bulk Approval: Coating: Non-flammable Yellow Epoxy Resin (UL94V-0) Tel: +86 28 67507119 Mobile: +86 15828190679 Fax [ ... ]

MYN15-221K PDF Datasheet Download