1N5239B Zener Diode by Motorola. Package: plastic DO-204 not glass, but with gold plated leads Ratings: 9.1 Volt nom. 500 mA max "B" ranking = Tollerance +/- 5% Download Motorola 1N5239B datasheet: Status: NOS (New Old Stock) In original sealed packets. Price is per single diode RoHS compliant: no