This part is a kind of semiconductor called 1N5059.

Function of this product has Standard Avalanche Sinterglass Diode.

Manufacturers : Vishay Telefunken

Image and pinout :

Some of the text within the PDF file :

www.vishay.com 1N5059, 1N5060, 1N5061, 1N5062 Vishay Semiconductors Standard Avalanche Sinterglass Diode 949539 MECHANICAL DATA Case: SOD-57 Terminals: plated axial leads, solderable per MIL-STD-750, method 2026 Polarity: color band denotes cathode end Mounting position: any Weight: approx. 369 mg FEATURES • Glass passivated junction • Hermetically sealed axial-leaded glass envelope • Controlled avalanche characteristics • Low reverse current • High surge current loading • Material categorization: For definitions of compliance please see www.vishay.com/doc?99912 APPLICATIONS • Rectification diode, general purpose ORDERING INFORMATION (Example) DEVICE NAME ORDERING CODE 1N5062 1N5062TR 1N5062 1N5062TAP TAPED UNITS 5000 per 10" tape and reel 5000 per ammopack MINIMU [ ... ]

1N5059 PDF Datasheet Download