This part is a kind of semiconductor called TS4448RZ.
Function of this product has 150mW High Speed SMD Switching Diode.
Manufacturers : Taiwan Semiconductor
Image and pinout :

Some of the text within the PDF file :
TS4448 RZ 150mW High Speed SMD Switching Diode Small Signal Diode 0603 A D B C FeaturesBV Designed for mounting on small surface. Extremely thin/leadless package High mounting capability,strong surage with stand, high reliability. Pb free version and RoHS compliant Green compound (Halogen free) with suffix "G" on packing code and prefix "G" on date code E Dimensions A B C D E Unit (mm) Min 1.60 0.80 0.70 Typ. Typ. Max 1.80 1.00 0.85 0.45 0.70 Unit (inch) Min Max 0.063 0.071 0.031 0.039 0.027 0.033 Typ. Typ. 0.018 0.028 Mechanical Data Case :0603 standard package, molded plastic Terminal: Gold plated, solderable per MIL-STD-750, method 2026 guaranteed High temperature soldering guaranteed: 260 °C/10s Polarity : Indicated by cathode band Weight : 0.003 gram (approxima [ ... ]
TS4448RZ PDF Datasheet Download
