What is the name of this Electronic Part?

I am attaching a picture of electronic component. please some help me to identify this part exactly. it will be great if some one can provide its datasheet. code is not readable on picture so i am writing below:

Text Printed on its body is : 135 (Diode Sign Verticaly) S12
This is one leged only

Regards.



Picture of What is the name of this Electronic Part?

A HEAT SINK DIODE............

iceng4 years ago
A press into heatsink diode like those used in car alternators..

A
No picture!
aliadnans (author)  steveastrouk4 years ago
sorry my bad. picture is added now