This part is a kind of semiconductor called 1N4742A.

Function of this product has Silicon Power Z-Diodes.

Manufacturers : Vishay Telefunken

Image and pinout :

Some of the text within the PDF file :

1N4728A...1N4761A Vishay Telefunken Silicon Power Z–Diodes Features D D D D Very sharp reverse characteristic Very high stability Low reverse current level VZ–tolerance ± 5% Applications 94 9369 Voltage stabilization Absolute Maximum Ratings Tj = 25_C Parameter Power dissipation Z–current Junction temperature Storage temperature range Test Conditions Tamb 50°C x Type Symbol PV IZ Tj Tstg Value 1 PV/VZ 200 –65...+200 Unit W mA °C °C Maximum Thermal Resistance Tj = 25_C Parameter Junction ambient Test Conditions l=9.5mm (3/8”), TL=constant Symbol RthJA Value 100 Unit K/W Electrical Characteristics Tj = 25_C Parameter Forward voltage Test Conditions IF=200mA Type Symbol VF Min Typ Max 1.2 Unit V Document Number 85587 Rev. 2, 01-Apr-99 www.vishay.de • FaxBack +1-40 [ ... ]

1N4742A PDF Datasheet Download