This part is a kind of semiconductor called XL1225.

Function of this product has TO-92 Plastic-Encapsulate Transistors.

Manufacturers : Avic Technology

Image and pinout :

Some of the text within the PDF file :

AVIC TECHNOLOGY CO.,LTD. TO-92 Plastic-Encapsulate Transistors XL1225 FEATURES TO-92 Silicon Planar pnpn Thyristor 1. CATHODE 2. GATE Current-IGT: ITRMS: VDRM: 120 0.6 400 µA 3. ANODE A 1 2 3 V Operating and storage junction temperature range TJ, Tstg : -55℃ to +150℃ ELECTRICAL CHARACTERISTICS (Tamb=25℃ Parameter On state voltage Gate trigger voltage Repetitive peak off-state voltage Holding current Symbol VTM VGTF VDRM IH A2 A1 A-1 Gate trigger current IGTF A-2 A B VAR=7V 45 60 80 60 80 120 µA µA µA unless otherwise specified) Test conditions ITM=0.6A VAK=7V IDRM= 10µA IHL= 20mA , Av = 7 V 5 15 30 400 5 15 30 45 MIN MAX 1.7 0.8 UNIT V V V mA µA µA µA DataShee DataSheet 4 U .com [ ... ]

XL1225 PDF Datasheet Download