BZV85-C3V9


BZV85-C3V9
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Kynix Part #:KY56-BZV85-C3V9
Manufacturer Part #:BZV85-C3V9
Product Category: Diodes - Zener - Single
Manufacturer:NXP Semiconductors
Description:
Package: 1321 ROHS
Quantity: 1330 PCS
Lead Free Status / RoHS Status: Lead free / RoHS Compliant
Lead Time: 3(168 Hours)
Data Sheet: datasheetBZV85-C3V9 Datasheet

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Specifications

Attribute Attribute Value
Manufacturer: NXP Semiconductors
Product Category: Diodes - Zener - Single

Alternate Names

NXP has several brands around the world that may alttemate names for BZV85-C3V9 due to regional differences or acquisition.
BZV85-C3V9 may also be known as the dollowing names:
  • PHILIPS
  • NXP
  • PHIL
  • PHILLIPS
  • PHI
  • PHILIPS/NXP
  • NXP SEMI
  • PHILIP
  • PHILIPS SEMICONDUCTORS
  • Philips Semiconductor
  • NXP SEMICONDUCTOR
  • PHILPS
  • NXP/PHILIPS
  • PHILIPS COMPONENTS
  • PHILIPS SEMI
  • PHL
  • PHLIPS
  • PHILIPS ECG
  • PHILL
  • Philips Semiconducto
  • PHILLIP
  • PHILI
  • PHIL/SIG
  • PHILTPS
  • ERO
  • NXP Semiconductors NV

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Frequently Asked Questions

What is a Zener Diode?

Zener diodes are silicone-based discrete semiconductor devices which allow current to flow bidirectionally - either reverse or forward. Diodes are comprised of a heavily-doped P-N silicone junction, which is intended to conduct in the reverse direction once a particular voltage threshold has been met.

Zener diodes have a set reverse breakdown voltage. When this is reached, they start to conduct current and continue to operate unceasingly in the reverse bias direction without incurring damage. One of the main benefits of Zener diodes is that a varying range of voltages will still maintain a constant voltage drop across the diode. As a result, Zener diodes can be used for voltage regulation applications.

How Does a Zener Diode Work?

The principle behind the operation of a Zener diode is determined by the cause of the diode’s breakdown in the reverse bias condition. There are typically two types – Zener and avalanche.

Zener Breakdown

A Zener breakdown happens with a reverse bias voltage between 2V and 8V. The intensity of the electric field is enough to apply force to the valence electrons, separating them from the nuclei – even at this low voltage. This process forms mobile electron-hole pairs, therefore increasing current flow.

Zener breakdowns typically occur for highly-doped diodes with a large electric field and low breakdown voltage. More energy is gained by the valence electrons as temperature increases, therefore requiring less outward voltage. This also means that Zener breakdown voltage reduces alongside temperature.

Avalanche Breakdown

Voltage breakdown also happens in the reverse bias condition, at a minimum of 8V, for light-doped diodes that have a large breakdown voltage. Electrons flowing through the diode collide with electrons in the covalent bond, disrupting it. The velocity of the electrons increases as the voltage also increases, meaning that the covalent bonds can be disrupted more easily. It should also be noted that avalanche breakdown voltage rises alongside temperature.

What is the Zener Diode Symbol?

The images below portray the standard Zener diode symbol used within a circuit diagram.

This symbol shows how the presence of a Zener diode would be noted in a circuit diagram. Similarly, if you see this symbol in a circuit diagram, it means that a Zener diode is present at that point in the circuit.


Zener Diode Symbol

This diagram then builds on the above, showing more information about the Zener diode. The top line of the diagram shows the diode symbol plus the positive and negative as it relates to the anode and cathode. The bottom line of the diagram shows the same, except with a simplified version of a realistic diode as opposed to the Zener diode symbol.


Zener Diode Circuit Diagram

Can You Connect Multiple Zener Diodes in Series?

It is possible to connect multiple Zener diodes in series and this is usually done to achieve a particular Zener voltage. However, if you are using multiple diodes, you must also monitor the Zener current and ensure the maximum is not exceeded. This is because the maximum allowable Zener current becomes equal to the lowest diode connected in the series. This also means that in a scenario where two Zener diodes are connected in series, one will not exhibit the stated Zener current or voltage if the diodes do not have the same Zener current specifications.

What is the Difference Between a Zener Diode vs a Diode?

A diode is a semiconductor device which conducts in a single direction (unidirectional). Zener diodes are also semiconductor devices, but the key difference is that they conduct in both a forward and reverse bias condition. Another important difference between the two types is doping intensity. Conventional diodes are typically moderately doped, whereas Zener diodes are doped more highly to enable sharper breakdown voltage.

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