This part is a kind of semiconductor called A1726.
Function of this product has 2SA1726.
Manufacturers : Allegro Micro Systems
Image and pinout :
Some of the text within the PDF file :
2SA1726 Silicon PNP Epitaxial Planar Transistor (Complement to type 2SC4512) sAbsolute maximum ratings (Ta=25°C) Symbol VCBO VCEO VEBO IC IB PC Tj Tstg 2SA1726 –80 –80 –6 –6 –3 50(Tc=25°C) 150 –55 to +150 Unit V V V A A W °C °C Application : Audio and General Purpose (Ta=25°C) 2SA1726 –10max –10max –80min 50min∗ –0.5max 20typ 150typ V pF 12.0min 4.0max sElectrical Characteristics Symbol ICBO IEBO V(BR)CEO hFE VCE(sat) fT COB Conditions VCB=–80V VEB=–6V IC=–25mA VCE=–4V, IC=–2A IC=–2A, IB=–0.2A VCE=–12V, IE=0.5A VCB=–10V, f=1MHz External Dimensions MT-25(TO220) 3.0±0.2 10.2±0.2 4.8±0.2 2.0±0.1 Unit µA µA V 16.0±0.7 8.8±0.2 a b ø3.75±0.2 MHz 1.35 ∗hFE Rank O(50 to 100), P(70 to 140), Y(90 to 180) 2.5 B C E 0.65 +0.2 -0.1 2.5 [ ... ]