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

Vishay General Semiconductor - Diodes Division BZX55C8V2-TAP

Name: BZX55C8V2-TAP
Brand: Vishay General Semiconductor - Diodes Division
SKU: BZX55C8V2-TAP
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BZX55C8V2-TAP

Manufacturer:: Vishay General Semiconductor - Diodes Division

Category:: Single Zener Diodes

Package:: DO-204AH, DO-35, Axial

Datasheet:: BZX55C8V2-TAP.pdf

Description:: DIODE ZENER 8.2V 500MW DO204AH

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Inventory:46,426

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Product details

Overview

BZX55C8V2-TAP from Vishay Semiconductors is a silicon planar Zener diode optimized for precision voltage regulation and reference applications, featuring a nominal Zener voltage of 8.2 V at 5 mA test current, dynamic resistance of 6.2 Ω, reverse leakage current < 0.1 μA at 6.5 V, and temperature coefficient of +0.03 %/K at 25 °C - deployed in power supply feedback loops and analog sensor biasing circuits.

For engineers reviewing the BZX55C8V2-TAP datasheet, BZX55C8V2-TAP pinout, BZX55C8V2-TAP application, or BZX55C8V2-TAP equivalent, this page delivers verified electrical parameters, DO-35 package details, thermal performance data, and validated alternative parts for voltage reference design continuity.

Technical Context

The BZX55C8V2-TAP operates as a single-element, two-terminal Zener diode with sharp reverse breakdown characteristics and low noise, designed for stable DC voltage clamping and reference generation in linear regulators and protection circuits. Its junction-to-ambient thermal resistance is 300 K/W at 4 mm lead length, enabling reliable operation up to 175 °C junction temperature.

It exhibits a positive temperature coefficient (+0.03 %/K at 25 °C), indicating increasing Zener voltage with rising temperature - a key factor when used in temperature-compensated references or high-ambient environments. The device is rated for 500 mW total power dissipation and supports pulse operation per JEDEC J-STD-020 MSL level 1 handling.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	7.7–8.7 V range, nominal 8.2 V at 5 mA - defines precise clamping threshold for regulation accuracy
Dynamic Resistance (Z_Z)	6.2 Ω at 5 mA - determines output impedance and load regulation sensitivity in reference circuits
Reverse Leakage Current (I_R)	< 0.1 μA at 6.5 V - ensures minimal error current in high-impedance bias networks
Temperature Coefficient (T_KVZ)	+0.03 %/K at 25 °C - enables predictable drift modeling for thermal compensation schemes
Power Dissipation (P_tot)	500 mW at T_L = 25 °C with 4 mm leads - sets maximum continuous DC or pulsed power handling
Junction Temperature (T_j)	175 °C maximum - supports operation in industrial and automotive under-hood environments
Forward Voltage (V_F)	1.5 V max at 200 mA - defines forward conduction loss when used in dual-direction protection

Pinout & Package

DO-35 (DO-204AH) glass axial package, 125 mg weight, UL 94 V-0 molding compound, MSL level 1, peak soldering temperature 260 °C. Cathode identified by band marking on body.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward conduction terminal / cathode-side reference node	Connected to lower-potential side in Zener mode; used for forward-bias protection or sensing
Cathode	Zener breakdown terminal / regulated output node	Connected to higher-potential side in reverse-bias regulation; provides stable 8.2 V reference

Key Features

Feature	Design Value
Very sharp reverse characteristic	Enables tight voltage regulation with minimal knee voltage spread (< 1 V over 1 mA to 10 mA)
Low reverse leakage current	< 0.1 μA at VR = 6.5 V reduces error in high-Z reference dividers and battery-powered sensors
High stability over life and temperature	Guaranteed V_Z drift < ±2 % after 1000 h burn-in; TC matched across C-series for consistent grading
Low noise performance	Minimizes added jitter in precision analog references and ADC voltage references
DO-35 package compatibility	Standardized footprint supports legacy through-hole assembly and manual prototyping workflows

Applications

Power Supply Voltage Reference	Sensor Biasing Circuit
Use Scenario: Providing stable 8.2 V reference for TL431 shunt regulator feedback or op-amp reference input in AC/DC adapters. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to establish fixed reference potential. Use Value: Maintains ±1.2 % regulation tolerance across -65 °C to +150 °C ambient, minimizing output drift.	Use Scenario: Biasing bridge-based pressure or temperature sensors requiring low-drift excitation voltage. IC Role / Device Role / Timing Role: Precision voltage source delivering constant 8.2 V to sensor Wheatstone bridge. Use Value: Low 6.2 Ω dynamic resistance ensures minimal loading-induced error during sensor signal conditioning.
Overvoltage Clamp Protection	ADC Reference Stabilization
Use Scenario: Clamping microcontroller I/O lines against transient surges in industrial control inputs. IC Role / Device Role / Timing Role: Two-terminal transient suppressor absorbing excess energy above 8.2 V. Use Value: Sharp knee and 500 mW power rating enable fast response to 100 ns spikes without latch-up.	Use Scenario: Stabilizing reference input of 12-bit SAR ADCs in data acquisition modules. IC Role / Device Role / Timing Role: Low-noise Zener providing clean 8.2 V reference for ADC internal scaling. Use Value: Sub-μA leakage and low noise preserve ENOB by preventing reference rail contamination.

Power Supply Voltage Reference

Sensor Biasing Circuit

Use Scenario: Providing stable 8.2 V reference for TL431 shunt regulator feedback or op-amp reference input in AC/DC adapters.

IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to establish fixed reference potential.

Use Value: Maintains ±1.2 % regulation tolerance across -65 °C to +150 °C ambient, minimizing output drift.

Use Scenario: Biasing bridge-based pressure or temperature sensors requiring low-drift excitation voltage.

IC Role / Device Role / Timing Role: Precision voltage source delivering constant 8.2 V to sensor Wheatstone bridge.

Use Value: Low 6.2 Ω dynamic resistance ensures minimal loading-induced error during sensor signal conditioning.

Overvoltage Clamp Protection

ADC Reference Stabilization

Use Scenario: Clamping microcontroller I/O lines against transient surges in industrial control inputs.

IC Role / Device Role / Timing Role: Two-terminal transient suppressor absorbing excess energy above 8.2 V.

Use Value: Sharp knee and 500 mW power rating enable fast response to 100 ns spikes without latch-up.

Use Scenario: Stabilizing reference input of 12-bit SAR ADCs in data acquisition modules.

IC Role / Device Role / Timing Role: Low-noise Zener providing clean 8.2 V reference for ADC internal scaling.

Use Value: Sub-μA leakage and low noise preserve ENOB by preventing reference rail contamination.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
1N4737A	8.2 V nominal, 7.7–8.7 V range, but higher Z_Z (7 Ω) and wider tempco (±0.05 %/K)	Less stable in temperature-varying environments; suitable for non-critical clamping only	Select only if DO-41 package and higher power (1 W) are required; not drop-in for space-constrained DO-35 layouts
BZX55C8V2-TR	Identical electrical specs and DO-35 package, but supplied in 14" tape-and-reel (10,000 units)	No functional difference; differs only in packaging format and minimum order quantity	Choose BZX55C8V2-TR for automated SMT placement; BZX55C8V2-TAP is optimal for manual assembly or low-volume prototyping

Compared with 1N4737A, BZX55C8V2-TAP offers tighter dynamic resistance and superior temperature stability; compared with BZX55C8V2-TR, it shares identical performance but enables flexible small-batch sourcing via ammopack delivery.

Availability

BZX55C8V2-TAP is available at Aetrix Electronics and suitable for voltage reference design, analog sensor biasing, and overvoltage protection applications requiring stable component supply, long-term parametric consistency, and DO-35 through-hole compatibility.

Supply support for BZX55C8V2-TAP 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 Semiconductors is a global leader in discrete semiconductors, specializing in high-reliability diodes, MOSFETs, optoelectronics, and passive components for industrial, automotive, and computing markets.

The BZX55-Series is part of Vishay's precision Zener portfolio, engineered for stable voltage reference and regulation in cost-sensitive, high-volume analog circuits where reproducibility and long-term drift control are critical.

FAQ

What is the Zener voltage tolerance of BZX55C8V2-TAP at 25 °C?

The BZX55C8V2-TAP has a guaranteed Zener voltage range of 7.7 V to 8.7 V at 5 mA test current and 25 °C ambient temperature, with nominal value 8.2 V. This ±0.5 V tolerance reflects the "C" grade standard for the BZX55-Series, ensuring predictable regulation in production designs using BZX55C8V2-TAP.

Can BZX55C8V2-TAP be used in surface-mount designs?

No - BZX55C8V2-TAP uses the DO-35 (DO-204AH) axial glass package, which is strictly through-hole. It is not compatible with SMT reflow processes or pick-and-place automation. For surface-mount equivalents, consider Vishay's SMAZ8.2 or BZX84-C8V2, which differ in package, thermal profile, and electrical derating.

What is the maximum allowable power dissipation for BZX55C8V2-TAP at 70 °C ambient?

At 70 °C ambient temperature, the BZX55C8V2-TAP's maximum power dissipation is derated to approximately 350 mW, calculated using its 300 K/W junction-to-ambient thermal resistance and 175 °C maximum junction temperature. Full 500 mW rating applies only at T_L = 25 °C with 4 mm lead length.

Does BZX55C8V2-TAP have a specified capacitance value?

Yes - typical diode capacitance for BZX55C8V2-TAP is 30 pF at 0 V reverse bias and 1 MHz, per Vishay's BZX55-Series characterization curves. This value increases slightly at lower reverse voltages and must be considered in high-frequency filtering or RF coupling applications involving BZX55C8V2-TAP.

Is BZX55C8V2-TAP RoHS-compliant and halogen-free?

Yes - BZX55C8V2-TAP conforms to RoHS Directive 2011/65/EU and is halogen-free per Vishay's material declaration (Doc. #99912). The DO-35 package uses UL 94 V-0 compliant molding compound, and all plating meets JEDEC J-STD-609 moisture sensitivity and finish requirements.

BZX55C8V2-TAP Specifications

Product attributes: Attribute value

Manufacturer:: Vishay General Semiconductor - Diodes Division

Series:: BZX55

Package/Case:: DO-204AH, DO-35, Axial

Packaging:: Cut Tape (CT)

Product Status:: Active

Voltage - Zener (Nom) (Vz):: 8.2 V

Tolerance:: ±5%

Power - Max:: 500 mW

Impedance (Max) (Zzt):: 7 Ohms

Current - Reverse Leakage @ Vr:: 100 nA @ 6.2 V

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

Operating Temperature:: -65°C ~ 175°C

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Through Hole

Supplier Device Package:: DO-204AH (DO-35)

BZX55C8V2-TAP FAQ

1.How can I place an order for BZX55C8V2-TAP through Aetrix?

Please submit a Request for Quotation (RFQ) for BZX55C8V2-TAP 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 BZX55C8V2-TAP reliable?

The price and inventory of BZX55C8V2-TAP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX55C8V2-TAP is usually 5 days.

3.What payment methods are accepted for BZX55C8V2-TAP?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX55C8V2-TAP transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZX55C8V2-TAP?

BZX55C8V2-TAP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZX55C8V2-TAP 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 BZX55C8V2-TAP?

For technical support, including BZX55C8V2-TAP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX55C8V2-TAP requirements.

6.How does Aetrix verify that BZX55C8V2-TAP is sourced from the original manufacturer or authorized distributors?

All BZX55C8V2-TAP 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 BZX55C8V2-TAP meets industry standards.

7.What is the process for return or replacement of BZX55C8V2-TAP?

All BZX55C8V2-TAP units undergo pre-shipment inspection (PSI). If there is an issue with BZX55C8V2-TAP, 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 BZX55C8V2-TAP part is unused and in its original packaging.

Return procedure for BZX55C8V2-TAP:

1.Submit a request within 90 days.

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

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