This part is a kind of semiconductor called 7N471K.

Function of this product has METAL OXIDE VARISTOR.

Manufacturers : JOYIN

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Some of the text within the PDF file :

久尹股份有限公司 Electrical Characteristics Maximum Allowable Voltage ACrms DC (V) (V) 300 385 Varistor Voltage V /1mA JOYIN CO., LTD. Type No. 7N471K (V) 470 Maximum Withstanding Rated Energy Clamping Surge Wattage 10/1000us Certification Voltage Current V@10A 1 Time 2 Times Tolerance (V) (A) (A) (W) (J) ±10% 775 1200 600 0.25 35.0 ☆ ★ ★ ※The clamping voltage from 080P to 680K are tested at current 2.5A. Material of coating : Epoxy powder Color of coating : Yellowish brown Storage condition → Temperature: -40 ℃ ~125℃ / Humidity : 75%RH max. Status Operation temperature range(18V~150V) : -40 to 85 ℃ Operation temperature range(180V~1800V) : -40 to 125 ℃ D Lead style : █ □ □ □ P : Straight type Y : Kink type I : Inside kink type E : Outside kink type [ ... ]

7N471K PDF Datasheet Download