20v one watt zener diode 5pcs pack

Nominal Zener Voltage: 20v
Diode Configuration: Single
Maximum Power Dissipation: 500 mW
Zener Type: Voltage Regulator
Zener Voltage Tolerance: ±2 %, ±5%
Maximum Zener Impedance:600 Ω @ 1 mA
Forward Voltage: 0.9V
Minimum Operating Temperature: -65 °C
Forward Current: 250mA
Maximum Operating Temperature: +200 °C