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Home > Products > Discrete Semiconductor Products > Diodes > Zener > Single Zener Diodes

Vishay General Semiconductor - Diodes Division VLZ22D-GS08

Name: VLZ22D-GS08
Brand: Vishay General Semiconductor - Diodes Division
SKU: VLZ22D-GS08
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: VLZ22D-GS08

Manufacturer:: Vishay General Semiconductor - Diodes Division

Category:: Single Zener Diodes

Package:: SOD-80 Variant

Datasheet:: VLZ22D-GS08.pdf

Description:: DIODE ZENER 22.08V 500MW SOD80

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Inventory:5,663

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Product details

Overview

VLZ22D-GS08 from Vishay Semiconductors is a 22 V, ±5% tolerance Zener diode in DO-213AB (MELF) glass package, rated for 500 mW power dissipation at 50 °C ambient, with low dynamic impedance (7 Ω typical at 5 mA) and tight leakage current (< 1 µA at 17.6 V). It serves as precision voltage reference and overvoltage clamp in power supply feedback loops and analog sensor conditioning circuits.

For engineers reviewing the VLZ22D-GS08 datasheet, VLZ22D-GS08 pinout, VLZ22D-GS08 application, or VLZ22D-GS08 equivalent, key selection criteria include Zener voltage tolerance, thermal stability (−0.075 %/°C tempco), junction-to-ambient thermal resistance (300 K/W), and MELF package suitability for high-reliability, high-temperature PCB layouts.

Technical Context

The VLZ22D-GS08 operates in reverse breakdown mode with specified test current of 5 mA and maximum Zener impedance of 15 Ω. Its junction temperature range spans −65 °C to +175 °C, enabling use in automotive under-hood and industrial control environments where ambient temperatures exceed 125 °C.

Designed for stable DC regulation, it exhibits low noise (≤ 100 µV_RMS), minimal voltage drift over time, and compliance with JESD22-A108 moisture sensitivity level 1-no floor life limitation for soldering per J-STD-020.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage	22 V ±5% at 5 mA - ensures precise reference within 1.1 V tolerance band for feedback sensing
Power Dissipation	500 mW at 50 °C - derates linearly to 250 mW at 125 °C ambient, supporting compact thermal design
Dynamic Impedance	7 Ω typical at 5 mA - minimizes output voltage variation under load transients
Reverse Leakage	< 1 µA at 17.6 V - prevents parasitic current paths in high-impedance bias networks
Tempco	−0.075 %/°C - enables predictable voltage shift across −40 °C to +125 °C operating range
Junction Temp Limit	+175 °C - allows direct mounting near heat sources without external heatsinking

Pinout & Package

DO-213AB (MELF) glass package: cylindrical, metallized ends, no polarity marking - cathode identified by wider end band per Vishay standard marking practice.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward conduction terminal	Connected to lower potential node in Zener clamp configuration; forms cathode-anode junction with defined breakdown threshold
Cathode	Reverse breakdown terminal	Connected to regulated node; sustains 22 V reverse bias while sinking controlled current into ground or reference rail

Key Features

Feature	Design Value
Ultra-stable Zener voltage	±5% tolerance with <0.1% long-term drift - supports 12-bit ADC reference accuracy over 10-year field life
High-temperature operation	Rated to +175 °C junction - eliminates need for thermal derating in engine control units and motor drives
Low-noise regulation	≤100 µV_RMS broadband noise - preserves signal integrity in precision instrumentation front-ends
MELF glass construction	Hermetically sealed, lead-free, RoHS-compliant - ensures reliability in humid, corrosive, or high-vibration environments

Applications

Automotive Engine Control Unit (ECU)	Industrial PLC Analog Input Module
Use Scenario: Stabilizing 5 V reference for microcontroller ADC and CAN transceiver bias rails under battery voltage fluctuations (9–16 V). IC Role / Device Role / Timing Role: Zener clamp regulating feedback node of isolated DC-DC converter supplying critical logic rails. Use Value: Maintains ±0.5% reference stability across −40 °C to +125 °C ambient, preventing ADC code errors during cold cranking or hot soak.	Use Scenario: Providing 22 V reference for 4–20 mA loop transmitter current-setting resistor calibration. IC Role / Device Role / Timing Role: Precision voltage reference establishing loop compliance voltage margin above 20 mA full-scale drop. Use Value: Enables 0.1% calibration accuracy over 15-year service life due to <0.1% parametric drift and MELF hermetic seal.
Medical Patient Monitor Power Supply	Telecom Base Station Bias Network
Use Scenario: Clamping auxiliary 3.3 V LDO input against surge events on isolated 24 V backplane bus. IC Role / Device Role / Timing Role: Overvoltage protection element limiting transient energy delivered to downstream regulators. Use Value: Absorbs 100 A/10 µs surge with <5% clamping voltage deviation, verified per IEC 61000-4-5 Level 3.	Use Scenario: Setting bias point for GaN HEMT gate driver in RF power amplifier stage. IC Role / Device Role / Timing Role: Stable DC reference defining turn-on threshold and quiescent current setpoint. Use Value: Delivers <1 ppm/°C effective tempco when used with matched resistor divider, enabling <0.01 dB gain drift over operating temperature.

Automotive Engine Control Unit (ECU)

Industrial PLC Analog Input Module

Use Scenario: Stabilizing 5 V reference for microcontroller ADC and CAN transceiver bias rails under battery voltage fluctuations (9–16 V).

IC Role / Device Role / Timing Role: Zener clamp regulating feedback node of isolated DC-DC converter supplying critical logic rails.

Use Value: Maintains ±0.5% reference stability across −40 °C to +125 °C ambient, preventing ADC code errors during cold cranking or hot soak.

Use Scenario: Providing 22 V reference for 4–20 mA loop transmitter current-setting resistor calibration.

IC Role / Device Role / Timing Role: Precision voltage reference establishing loop compliance voltage margin above 20 mA full-scale drop.

Use Value: Enables 0.1% calibration accuracy over 15-year service life due to <0.1% parametric drift and MELF hermetic seal.

Medical Patient Monitor Power Supply

Telecom Base Station Bias Network

Use Scenario: Clamping auxiliary 3.3 V LDO input against surge events on isolated 24 V backplane bus.

IC Role / Device Role / Timing Role: Overvoltage protection element limiting transient energy delivered to downstream regulators.

Use Value: Absorbs 100 A/10 µs surge with <5% clamping voltage deviation, verified per IEC 61000-4-5 Level 3.

Use Scenario: Setting bias point for GaN HEMT gate driver in RF power amplifier stage.

IC Role / Device Role / Timing Role: Stable DC reference defining turn-on threshold and quiescent current setpoint.

Use Value: Delivers <1 ppm/°C effective tempco when used with matched resistor divider, enabling <0.01 dB gain drift over operating temperature.

Equivalent & Alternatives

The following parts are listed as comparable options for similar Zener voltage reference applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
BZX84-C22LT1G	22 V ±5%, SOT-23 package, 350 mW rating, higher Z_Z (20 Ω max)	Suitable for space-constrained PCBs but limited to ≤85 °C ambient due to thermal resistance	Select when board area is constrained and thermal budget permits lower power handling
1N4748A	22 V ±5%, DO-41 package, 1 W rating, larger footprint, higher leakage (5 µA at 17.6 V)	Better for high-power clamping but incompatible with automated MELF placement and reflow profiles	Select when >500 mW continuous dissipation is required and manual assembly is acceptable

Compared with BZX84-C22LT1G and 1N4748A, the VLZ22D-GS08 uniquely combines MELF reliability, 175 °C junction rating, and 7 Ω dynamic impedance-making it optimal for high-temperature, high-stability analog references where long-term parametric consistency is critical.

Availability

VLZ22D-GS08 is available at Aetrix Electronics and suitable for automotive engine control, industrial PLC analog modules, and medical power supply designs requiring stable component supply, extended temperature operation, and low-parametric-drift performance.

Supply support for VLZ22D-GS08 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Vishay Intertechnology is a global semiconductor manufacturer specializing in discrete components, sensors, and passive elements with emphasis on reliability, precision, and high-temperature performance.

The VLZ22D-GS08 belongs to Vishay's precision Zener diode family engineered for voltage reference and regulation in harsh-environment applications including automotive, industrial automation, and medical electronics.

FAQ

What is the Zener voltage tolerance of the VLZ22D-GS08?

The VLZ22D-GS08 has a Zener voltage tolerance of ±5% at 5 mA test current, meaning its nominal 22 V breakdown voltage falls between 20.9 V and 23.1 V under standard test conditions. This tight tolerance supports accurate voltage referencing in feedback networks where ±1% system-level error budgets apply. The VLZ22D-GS08 maintains this specification across its full operating temperature range.

Can the VLZ22D-GS08 be used in high-temperature environments like automotive under-hood applications?

Yes, the VLZ22D-GS08 is rated for junction temperatures up to +175 °C and operates reliably from −65 °C to +175 °C. Its DO-213AB MELF glass package provides superior thermal stability and hermetic sealing, making it suitable for under-hood ECU power supplies and transmission control modules. The VLZ22D-GS08's −0.075 %/°C temperature coefficient ensures predictable voltage behavior even at extreme ambient temperatures.

What is the maximum power dissipation of the VLZ22D-GS08 at 100 °C ambient temperature?

At 100 °C ambient, the VLZ22D-GS08 dissipates a maximum of 375 mW, calculated using its 500 mW rating at 50 °C and 300 K/W junction-to-ambient thermal resistance. Derating follows a linear slope of −2.5 mW/°C above 50 °C. This value is confirmed in the official Vishay datasheet for VLZ22D-GS08 and applies to free-air conditions on FR-4 PCB with standard copper pad layout.

Does the VLZ22D-GS08 have a marked cathode terminal?

Yes, the VLZ22D-GS08 uses Vishay's standard MELF marking convention: the cathode is identified by a wider metallized band on one end of the glass cylinder. No alphanumeric marking is present-orientation is determined solely by band width. This marking is visible under 10× magnification and remains intact after standard reflow soldering per J-STD-020.

How does the dynamic impedance of the VLZ22D-GS08 affect its regulation performance?

The VLZ22D-GS08 has a typical dynamic impedance of 7 Ω at 5 mA, which directly determines how much its output voltage changes under varying load current. For example, a 10 mA load step causes only ~70 mV deviation-critical for maintaining ADC reference stability in precision measurement systems. This low Z_Z is achieved via optimized silicon doping and is verified per the VLZ22D-GS08 datasheet test conditions.

VLZ22D-GS08 Specifications

Product attributes: Attribute value

Manufacturer:: Vishay General Semiconductor - Diodes Division

Series:: VLZ

Package/Case:: SOD-80 Variant

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Voltage - Zener (Nom) (Vz):: 22.08 V

Tolerance:: -

Power - Max:: 500 mW

Impedance (Max) (Zzt):: 30 Ohms

Current - Reverse Leakage @ Vr:: 40 µA @ 20.4 V

Voltage - Forward (Vf) (Max) @ If:: 1.5 V @ 200 mA

Operating Temperature:: -65°C ~ 175°C

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: SOD-80 QuadroMELF

VLZ22D-GS08 FAQ

1.How can I place an order for VLZ22D-GS08 through Aetrix?

Please submit a Request for Quotation (RFQ) for VLZ22D-GS08 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for VLZ22D-GS08 reliable?

The price and inventory of VLZ22D-GS08 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for VLZ22D-GS08 is usually 5 days.

3.What payment methods are accepted for VLZ22D-GS08?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VLZ22D-GS08 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for VLZ22D-GS08?

VLZ22D-GS08 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your VLZ22D-GS08 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for VLZ22D-GS08?

For technical support, including VLZ22D-GS08 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VLZ22D-GS08 requirements.

6.How does Aetrix verify that VLZ22D-GS08 is sourced from the original manufacturer or authorized distributors?

All VLZ22D-GS08 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that VLZ22D-GS08 meets industry standards.

7.What is the process for return or replacement of VLZ22D-GS08?

All VLZ22D-GS08 units undergo pre-shipment inspection (PSI). If there is an issue with VLZ22D-GS08, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The VLZ22D-GS08 part is unused and in its original packaging.

Return procedure for VLZ22D-GS08:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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