This part is a kind of semiconductor called 1N5922A.
Function of this product has SILICON ZENER DIODES.
Manufacturers : EIC discrete Semiconductors
Image and pinout :

Some of the text within the PDF file :
1N5913A - 1N5957A VZ : 3.3 - 240 Volts PD : 1.5 Watts FEATURES : * Complete Voltage Range 3.3 to 200 Volts * High peak reverse power dissipation * High reliability * Low leakage current SILICON ZENER DIODES DO - 41 0.107 (2.7) 0.080 (2.0) 1.00 (25.4) MIN. 0.205 (5.2) 0.166 (4.2) MECHANICAL DATA * Case : DO-41 Molded plastic * Epoxy : UL94V-O rate flame retardant * Lead : Axial lead solderable per MIL-STD-202, method 208 guaranteed * Polarity : Color band denotes cathode end * Mounting position : Any * Weight : 0.339 gram 0.034 (0.86) 0.028 (0.71) 1.00 (25.4) MIN. Dimensions in inches and ( millimeters ) MAXIMUM RATINGS Rating at 25 °C ambient temperature unless otherwise specified Rating DC Power Dissipation at TL = 75 ° C (Note1) Maximum Forward Voltage at I F = 200 mA Maximum T [ ... ]
1N5922A PDF Datasheet Download
