Avalanche Diode

An avalanche diode conducts when the voltage across it exceeds a certain value, E.G a 5.6v zenner diode (avanache diode) will conduct in one direction like an ordinary diode, in the other direction it won't conduct until it has 5.6v across it, then it will suddenly start conducting.
For the above you will see that NO, you can't replace it with an ordiary diode and expect the circuit to still work.

Del

Normally avalanche diode are used for purpose of simple voltage stabilizing or as a

voltage reference in a particular circuit.i.e OPAMP .Depends on the circuit design.

Normal diodes or rectifier diode are mainly used for converting AC to DC .And also divided into two type which Normal and Fast Recovery type also we ultra fast recovery.

Please check the part number before replacing the diode.

Avalanche and Zener breakdown diodes (same function, different reverse breakdown mechanisms, although both are commonly called Zener diodes) are sometimes used for over-voltage protection of other circuit elements, particularly amplifier and comparator inputs where neither any significant negative voltage or excess positive voltage can be tolerated. Under normal operation in such applications, the diode is reverse-biased below its breakdown voltage, and therefore has no effect on the circuit other than a (usually insignificant) capacitance and noise contribution.

In this case you could get away with using a normal diode only until you needed over-voltage protection in the positive-going direction. Then you'll be asking yourself why you blew up a $2 chip to save 2 cents on a diode.

High voltage avalanche diodes are also used in high voltage rectifier applications where multiple diodes are required in series because a single diode can not be sourced for the job. Their characteristics means that the reverse voltage is reasonably evenly shared across the set of series diodes.

In this application, like the others mentioned it is definitely NOT safe to use a normal diode - in fact all the diodes in that branch should be of the same manufacturer and characteristics.

Avalanche are from accelerated high energy charge carriers, and damaging type and for limited time in exceptional cases only. Perhaps one can use for protection against high voltage spikes, or for very short pulses that otherwise can cause disaster.

Avalanche provides amplification and results into very high current up to 10E+7 times and can be used in amplifiers for weak signals, and serves little purpose in replacement of rectifier diodes where normal diodes can do the job. However in pulse power supplies synchronous rectification is far better if very high current is required. Few hundred amperes can be injected through IGBY and MOSFETs safely.

avalanche diode is used for constant voltage for large range of currents after go in to avalanche breakdown condition.

no,it can't be replaced by ordinary diode.

avalanche diode is used for constant voltage for large range of currents after diode go in to avalanche breakdown region.

no,avalanche diode is not replaced by ordinary diode because diode in reverse bias condition goes burn out