voltage limiter problem

[studystudystudy]

i using two zener diode having 5V breakdown voltage as a limiter

two zener diode is parallel with each other but the one of the zener diode polarity is inverse.

if i connect to the input AC voltage, its should limit the voltage to 5V if the input is exceed 5 voltage.

i simulate it in the Multisim, but the output always same with the input no matter the input value is exceed or lower the breakdown voltage.

why this happen?

 

[audioguru]

Multisim has many problems. You found one.

 

[BrownOut]

The zener resistance breaks down. You need fixed resistors in series to create a voltage divider.