Taiwan Semi, 12V Zener Diode 2% 500 mW SMT 2-Pin SOD-123F. Diode Configuration: Single. Mounting Type: Surface Mount. Zener Type: General Purpose. Zener Voltage Tolerance: 0.02. Test Current: 5mA. Maximum Zener Impedance: 25Ω. Maximum Reverse Leakage Current: 90nA. Length: 2.7mm. Dimensions: 2.7 x 1.7 x 1mm. Height: 1mm. MPN: BZT52B12 RH, Taiwan Semiconductor