This post explains for the zener diode.
The Part Number is 1N5352, IN5352.
The function of this semiconductor is Diode Zener Single 15V 20% 5W 2-Pin Case T-18.
The package is Axial Type.
Manufacturer: New Jersey Semiconductor
Preview images :
This is 5W, 15V, Zener Diode.
Other data sheets are available within the file: 1N5333B, 1N5335B, 1N5352B