How to identify common zener diode

Zener diode in the circuit used in "ZD" and the digital representation, such as: ZD5 said no. 5 is a voltage stabilizing tube.

Stabilization principle 1, zener diode characteristics: zener diode is after the breakdown, the terminal voltage of the remained basically unchanged. So, when the voltage regulator tube access circuit, if the power supply voltage fluctuations occur, or other causes of electric circuit and the point of voltage changes, voltage across the load will remain basically unchanged.

2, the fault features: fault voltage stabilizing diode mainly instability in the open circuit and short circuit and voltage value. In these 3 kinds of fault, a fault showbefore the supply voltage rise; after 2 kinds of fault for power supply voltage is low to zero volts or output instability.

Type and regulated common zener diode value are listed in the following table:

Model: 1N4728 1N4729 1N4730 1N4732 1N4733 1N4734 1N4735 1N4744 1N47501N47511N4761

Voltage values: 3.3V 3.6V 3.9V 4.7V 5.1V 5.6V 6.2V 15V 27V 30V 75V