This part is a kind of semiconductor called CH402H-40PT.

Function of this product has SCHOTTKY BARRIER DIODE.

Manufacturers : Chenmko Enterprise

Image and pinout :

Some of the text within the PDF file :

CHENMKO ENTERPRISE CO.,LTD SURFACE MOUNT SCHOTTKY BARRIER DIODE VOLTAGE 40 Volts CURRENT 0.02 Ampere APPLICATION * Low barrier diode for detectors up to GHz frequencies CH402H-40PT FEATURE * Small surface mounting type. (SOT-143) * Extremely low forward voltage. * A composite component and is ideal for reducing the number of components used. * High reliability SOT-143 0.4±0.1 (3) (2) (1) 0.4±0.1 2.9±0.2 1.70±0.1 0.8±0.1 1.30±0.1 CONSTRUCTION * Silicon epitaxial planar 1.9±0.1 0.95 0.4±0.1 (4) MARKING * H1 0.10±0.05 0.1Min. 1.1±0.1 0.55±0.1 0~0.1 2.6Max. CIRCUIT (4) (3) (1) (2) Dimensions in millimeters SOT-143 RATINGS SYMBOL MIN. CH402H-40PT TYP. 2.0 0.1 0.35 225 MAX. 40 20 100 0.6 +150 UNITS Maximum Recurrent Peak Reverse Voltage Maximum Average Forward Rec [ ... ]

CH402H-40PT PDF Datasheet Download