This part is a kind of semiconductor called XL1225.

Function of this product has MEDIUM POWER LOW VOLTAGE TRANSISTOR.

Manufacturers : Unisonic Technologies

Image and pinout :

Some of the text within the PDF file :

UNISONIC TECHNOLOGIES CO.,LTD. XL/ML1225 MEDIUM POWER LOW VOLTAGE TRANSISTOR  DESCRIPTION The XL1225/ML1225 silicon controlled rectifiers are high performance planner diffused PNPN devices. These parts are intended for low cost high volume applications. SCR  ORDERING INFORMATION Ordering Number Lead Free Halogen Free - XL1225G-xx-AE3-R XL1225L-xx-T92-B XL1225G-xx-T92-B XL1225L-xx-T92-K XL1225G-xx-T92-K - ML1225G-xx-AE3-R ML1225L-xx-T92-B ML1225G-xx-T92-B ML1225L-xx-T92-K ML1225G-xx-T92-K Note: Pin Assignment : G: Gate K: Cathode A: Anode Package SOT-23 TO-92 TO-92 SOT-23 TO-92 TO-92 Pin Assignment 123 GKA KGA KGA GKA KGA KGA Packing Tape Reel Tape Box Bulk Tape Reel Tape Box Bulk  MARKING Package SOT-23 TO-92 XL1225 MARKING www.unisonic.com.tw Copyright © 2 [ ... ]

XL1225 PDF Datasheet Download