This part is a kind of semiconductor called 1N5240.

Function of this product has Small Signal Zener Diodes.

Manufacturers : Vishay

Image and pinout :

Some of the text within the PDF file :

www.vishay.com 1N5221 to 1N5267 Vishay Semiconductors Small Signal Zener Diodes PRIMARY CHARACTERISTICS PARAMETER VALUE VZ range nom. 2.4 to 75 Test current IZT 1.7 to 20 VZ specification Thermal equilibrium Int. construction Single UNIT V mA FEATURES • Silicon planar power Zener diodes • Standard Zener voltage tolerance is ± 5 % with a “B” suffix in the ordering code (e.g.: 1N5221B), suffix “C” is ± 2 % tolerance • These diodes are also available in MiniMELF case with the type designation TZM5221 to TZM5267, SOT-23 case with the type designations MMBZ5225 to MMBZ5267 and SOD-123 case with the types designations MMSZ5225 to MMSZ5267 • AEC-Q101 qualified • Material categorization: for definitions of compliance please see www.vishay.com/doc?99912 APPLICATIO [ ... ]

1N5240 PDF Datasheet Download