This part is a kind of semiconductor called 1SS133M.

Function of this product has Hermetically Sealed Glass Switching Diodes.

Manufacturers : Taiwan Semiconductor

Image and pinout :

Some of the text within the PDF file :

Small Signal Product 1SS133M Taiwan Semiconductor 300mW, Hermetically Sealed Glass Switching Diodes FEATURES - Fast switching device (trr < 4.0 ns) - Through-hole mount device type - DO-34 package (JEDEC DO-204) - Hermetically sealed glass - Compression bonded construction - All external surfaces are corrosion resistant and leads are readily solderable - RoHS compliant - Solder hot dip Tin (Sn) lead finish - Cathode indicated by polarity band - Marking code: 133 DO-34 MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS (TA=25°C unless otherwise noted) PARAMETER SYMBOL VALUE Power Dissipation PD 300 Working Inverse Voltage WIV 90 Average Rectified Current IO 150 Non-Repetitive Peak Forward Current Peak Forward Surge Current IFM IFSURGE 450 2 Operating Junction Temperature TJ [ ... ]

1SS133M PDF Datasheet Download