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A Zener diode is a special type of diode designed to reliably allow current to flow "backwards" ... The value of this current is given in the data sheet for D.
Three 1N4148 diodes in glass DO-35 axial package. The black band on the right is the cathode side. Diode schematic symbol vs cathode marking on the package.. The 1N4148 is a standard silicon switching signal diode.
In some datasheets, the series is labelled as zener diode, [2] but this is not always the case as the series relies on avalanche breakdown for higher voltage. [3] The BZT52 series is a good surface-mount equivalent for the BZT79 series.
Reference voltage vs free-air temperature at test conditions. Design-center (middle plot) and worst-case deviation of ±2% (upper and lower plots) [12] The nominal reference voltage, V REF =2.495 V, stated in a datasheet, is tested in zener mode at an ambient temperature of +25 °C (77 °F), and I CA =10 mA. [13]
Temperature compensated Zener reference diode, 1.22 V breakdown voltage [50] [51] LM329 Temperature compensated Zener reference diode, 6.9 V breakdown voltage [52] LM136 LM236 LM336 2.5 V or 5 V Zener reference diode with temperature coefficient trimmer [53] LM368 Yes 2.5 V precision voltage reference [54] LM169 LM369 LM199 Yes
In electronics, the Zener effect (employed most notably in the appropriately named Zener diode) is a type of electrical breakdown, discovered by Clarence Melvin Zener. It occurs in a reverse biased p-n diode when the electric field enables tunneling of electrons from the valence to the conduction band of a semiconductor , leading to numerous ...
These devices are widely used and recommended for general-purpose power-frequency rectifier use. [11] [12] They are commonly used as rectifiers in AC adapters of electrical appliances to convert AC to DC, [13] and are also used in other types of power converters, [2] or as freewheeling diodes to protect circuits from inductive loads.
A schematic symbol for Schottky diodes 1N5822 Schottky diode with cut-open packaging. The semiconductor in the center makes a Schottky barrier against one metal electrode (providing rectifying action) and an ohmic contact with the other electrode.
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