Nexperia, 18V Zener Diode 2% 300 mW SMT 2-Pin SOD-323. Diode Configuration: Single. Mounting Type: Surface Mount. Zener Type: Voltage Regulator. Zener Voltage Tolerance: 0.02. Test Current: 5mA. Maximum Zener Impedance: 45Ω. Maximum Reverse Leakage Current: 50nA. Length: 1.8mm. Dimensions: 1.8 x 1.35 x 1.05mm. Width: 1.35mm. MPN: BZX384-B18