This part is a kind of semiconductor called 1N4248.

Function of this product has GLASS PASSIVATED JUNCTION SILICON RECTIFIERS.

Manufacturers : EIC

Image and pinout :

Some of the text within the PDF file :

Certificate TH97/10561QM Certificate TW00/17276EM 1N4245 - 1N4249 GLASS PASSIVATED JUNCTION SILICON RECTIFIERS PRV : 200 - 1000 Volts Io : 1.0 Ampere M1A FEATURES : * Glass passivated chip * High forward surge current capability * High reliability * Low reverse current * Low forward voltage drop * Pb / RoHS Free MECHANICAL DATA : * Case : M1A 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 : 0.20 gram (approximately) 0.085(2.16) 0.075(1.91) 0.024(0.60) 0.022(0.55) 1.00 (25.4) MIN. 0.138(3.51) 0.122(3.10) 1.00 (25.4) MIN. Dimensions in inches and ( millimeters ) MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS Rating at 25 °C amb [ ... ]

1N4248 PDF Datasheet Download