Additional preview pages of the 1N4728A datasheet.
1N4728A Product details
Features
D Zener Voltage 3.3V to 100V
Absolute Maximum Ratings: (TA = +25C, unless otherwise specified) Power Dissipation (TL +50C, Lead Length = 3/8”), PD.
. . 1.0W
Derate Above +50.
. . . 6.67mW/C
Operating Temperature Range, Topr.