Voltageregulatordiode. Working voltage (nom) 91 V.
稳压二极管。工作电压（名称）91 V。
2
Voltageregulatordiode. Working voltage (nom) 180 V. Transient suppressor diode. Reverse breakdown voltage 168 v.
稳压二极管。工作电压(名称)180 V。瞬态抑制二极管。反向击穿电压168 V。
3
In the voltageregulator circuit, the zener diode which ACTS as the voltage datum, along with the temperature change, its regulated voltage value also can have the corresponding change.