✔ Silicon Diode Breakdown Voltage

Silicon Diode Breakdown Voltage

- June 06, 2019

Zener breakdown is the phenomena wherein the zener diode experiences reverse breakdown at a much lower voltage than a normal diode which may breakdown in excess of 100 volts depending on the type. For a germanium device the reverse saturation current at 250c may be around 1 ma which is much larger than the reverse current for a silicon diode.

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For silicon diodes which are generally the most common the diode forward voltage drop is about 07 volts v.

Silicon diode breakdown voltage. Breakdown is characterized by the rapid increase of the current under reverse bias. Silicon diodes require 07 volts to become forward biased whereas germanium diodes require only 03 volts to become forward biased. Breakdown voltage is a parameter of a diode that defines the largest reverse voltage that can be applied without causing an exponential increase in the leakage current in the diode.

The materials and applications of the two major types of diodes studied in this lab are found in table 3 below. The corresponding applied voltage is referred to as the breakdown voltage. In a small silicon diode operating at its rated currents the voltage drop is about 06 to 07 volts.

Exceeding the breakdown voltage of a diode per se is not destructive. The primary difference between silicon and germanium diodes is the voltage needed for the diode to turn on or become forward biased. The forward voltage drop of a germanium diode is typically 03 v compared to 07 v for silicon.

The value is different for other diode typesschottky diodes can be rated as low as 02 v germanium diodes 025 to 03 v and red or blue light emitting diodes leds can have values of 14 v and 40 v respectively. The maximum reverse bias voltage that can be applied to a p n diode is limited by breakdown. Diodes are devices that pass electric current in one direction only and therefore may be thought of as a kind of one way valve for electrons.

The breakdown voltage is a key parameter of power devices. Materials and specifications of diodes. Diode type rectifier diode zener diode material silicon silicon voltage range v br to 12 v v z to 12 v current range 5 ua to 10 a 20 ma to 100 ma typical operation forward and.

Although exceeding its current capacity will be. The turn on voltage for the diode is in between 02v and 03v for silicon diode against 06v to 07v for a standard silicon diode.