This part is a kind of semiconductor called K3738.

Function of this product has 2SK3738.

Manufacturers : Sanyo

Image and pinout :

Some of the text within the PDF file :

Ordering number : ENN7671 2SK3738 N-Channel Junction Silicon FET 2SK3738 Impedance Converter Applications Application • Impedance conversion. • Infrared sensor. www.DataSheetF4Ue.acotmures • Small IGSS. • Small Ciss. • Ultrasmall package permitting applied sets to be small and slim. Package Dimensions unit : mm 2124 [2SK3738] 0.75 0.3 0.6 3 0~0.1 12 0.5 0.5 1.6 0.2 0.1 0.4 0.8 0.4 1.6 0.1max Specifications Absolute Maximum Ratings at Ta=25°C Parameter Drain-to-Source Voltage Gate-to-Drain Voltage Gate Current Drain Current Allowable Power Dissipation Junction Temperature Storage Temperature Symbol VDSS VGDS IG ID PD Tj Tstg Electrical Characteristics at Ta=25°C Conditions Parameter Gate-to-Drain Breakdown Voltage Gate-to-Source Leakage Current Cutoff Voltage Zero [ ... ]

K3738 PDF Datasheet Download