This part is a kind of semiconductor called 1SS133.

Function of this product has Switching diode.

Manufacturers : Rohm

Image and pinout :

Some of the text within the PDF file :

1SS133 Diodes Switching diode 1SS133 !Applications High speed switching !External dimensions (Units : mm) CATHODE BAND (YELLOW) φ0.4±0.1 !Features 1) Glass sealed envelope. (MSD) 2) High speed. (trr=1.2ns Typ.) 3) High reliability. 29.0±1.0 2.7±0.3 29.0±1.0 φ1.8±0.2 ROHM : MSD EIAJ : − JEDEC : DO-34 !Construction Silicon epitaxial planar !Absolute maximum ratings (Ta=25°C) Parameter Peak reverse voltage DC reverse voltage Peak forward current Mean rectifying current Surge current (1s) Power dissipation Junction temperature Storage temperature Symbol VRM VR IFM IO Isurge P Tj Tstg Limits 90 80 400 130 600 300 175 −65~+175 Unit V V mA mA mA mW °C °C !Electrical characteristics (Ta=25°C) Parameter Forward voltage Reverse current Capacitance between terminals Reverse [ ... ]

1SS133 PDF Datasheet Download