Avalanche diodes

Description

DA161 and DA171 are an avalanche diode in stud design. It has a repetitive peak reversevoltageVRRM of 400-1800 V and low static losses. Mean forward current IFAV is 200А/320A. Industry standard design enables easy installation into existing equipment. Maximal junction temperature Tjmax is 150 °C.

Avalanche diodes are designed for general application in systems up to 500 Hz. Anode and cathode are flat bases. Polarity of the diode is marked by a polarity symbol on its housing. Operation principle of avalanche diodes is based on the effect of reversible breakdown of the p-n junction under reverse voltage. As soon as the voltage reaches certain value set by design each avalanche diode, current sharply rises while voltage remains the same. Main role of avalanche diodes is protection of power circuits from overvoltages.

Features:
∙High resistance to electric and thermal cycling;
∙Low dynamic losses;
∙High reliability means minimal equipment downtime;
∙Optimized for industrial use.

Application:

Avalanche diodes are designed for static converters and other AC/DC circuits operating on standard or increased frequency requiring low reverse recovery time and high surge reverse power dissipation.

1.  DA — Avalanche Diode
2.  Design version
3.  Average forward current, A
4.  Polarity:
X- Cathode to Stud;
no symbol - Anode to Stud 
5.  Voltage code

DL161 M16x1,5 or M20x1,5	DL171 M24x1,5