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

onsemi BZX85C6V2

Name: BZX85C6V2
Brand: onsemi
SKU: BZX85C6V2
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BZX85C6V2

Manufacturer:: onsemi

Category:: Single Zener Diodes

Package:: DO-204AL, DO-41, Axial

Datasheet:: BZX85C6V2.pdf

Description:: DIODE ZENER 6.2V 1W DO204AL

Quantity:: RFQ Add To RFQ list

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Inventory:45,500

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Product details

Overview

BZX85C6V2 from Fairchild Semiconductor is a 6.2 V, ±5% tolerance, 1.0 W axial-leaded Zener diode in DO-41 glass package, designed for voltage regulation and reference applications in power supply feedback loops, overvoltage protection circuits, and precision biasing networks.

For engineers reviewing the BZX85C6V2 datasheet, pinout, applications, or equivalent options, key selection criteria include zener voltage accuracy (5.8–6.6 V), low dynamic impedance (35 Ω @ 4 mA), leakage current (<1 μA @ 4.5 V), and thermal stability across -65°C to +200°C operating range.

Technical Context

The BZX85C6V2 operates as a silicon planar Zener diode with sharp reverse breakdown at nominal 6.2 V, measured under thermal equilibrium at 30°C lead temperature with 3/8″ lead length. Its design targets stable DC voltage reference generation in low-to-medium power analog and power management circuits.

It features a glass-passivated DO-41 package with cathode band marking, rated for 1.0 W dissipation at 25°C ambient and derated linearly above 50°C (6.67 mW/°C). Forward voltage is specified ≤1.2 V at 200 mA, confirming standard PN junction behavior.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	5.8–6.6 V at I_Z = 4 mA - defines precise regulation window for feedback or clamping
Zener Impedance (Z_Z)	35 Ω @ I_Z = 4 mA - ensures minimal output voltage variation under load changes
Power Dissipation (P_D)	1.0 W @ T_A = 25°C - supports continuous operation in compact PCB layouts without forced cooling
Leakage Current (I_R)	<1 μA @ V_R = 4.5 V - guarantees negligible error current in high-impedance reference nodes
Operating Temp Range	-65°C to +200°C - enables use in automotive under-hood, industrial motor control, and aerospace environments
Tolerance	±5% - provides predictable voltage margin for circuit margining and safety-critical clamping
Forward Voltage (V_F)	≤1.2 V @ I_F = 200 mA - confirms standard silicon diode conduction for polarity-sensitive protection

Pinout & Package

DO-41 glass axial package with cathode indicated by color band on body; leads are unmarked anode/cathode terminals with no internal asymmetry beyond band marking.

Pin/Terminal	Circuit Role	Design Meaning
Anode (unbanded lead)	Current entry terminal in forward bias	Connects to lower-potential node in regulation or clamping path
Cathode (banded lead)	Current exit terminal in reverse breakdown	Connects to regulated output or protected node; defines reference potential

Key Features

Feature	Design Value
Stable Zener voltage with tight 5% tolerance	Enables accurate voltage setting without post-production trimming in cost-sensitive designs
Low dynamic impedance (35 Ω)	Maintains regulation accuracy under varying load currents up to 4 mA
High-temperature operation to +200°C	Supports deployment in engine control units, power converters, and downhole electronics
DO-41 glass package with cathode band	Provides hermetic reliability and visual polarity identification for manual assembly and inspection
1.0 W power rating with linear derating	Allows thermal design predictability in natural-convection environments without heatsinking

Applications

Switch-Mode Power Supply Feedback	Overvoltage Protection Clamp
Use Scenario: Used in optocoupler-coupled feedback loop of isolated AC/DC adapters to regulate 5 V or 12 V output. IC Role / Device Role / Timing Role: Zener reference element setting TL431 cathode voltage threshold. Use Value: 6.2 V nominal breakdown ensures stable regulation within ±5% across temperature and line/load variations.	Use Scenario: Placed across microcontroller I/O rail to clamp transient spikes from relay switching or ESD events. IC Role / Device Role / Timing Role: Shunt protection device limiting voltage to safe level below IC absolute maximum rating. Use Value: Low leakage (<1 μA) avoids loading sensitive inputs; 1.0 W rating absorbs short-duration 100 ns–1 μs transients.
Precision Bias Reference	Industrial Sensor Excitation
Use Scenario: Supplies stable 6.2 V reference to op-amp input stage in 4–20 mA transmitter front-end. IC Role / Device Role / Timing Role: Passive voltage reference source for ratiometric signal conditioning. Use Value: ±5% tolerance and <35 Ω impedance minimize offset drift and gain error in analog signal chains.	Use Scenario: Powers resistive bridge sensors (e.g., strain gauges) in factory automation load cells. IC Role / Device Role / Timing Role: Stable excitation source ensuring consistent sensor output scaling. Use Value: Operation to +200°C allows integration near hot machinery; DO-41 glass withstands solder reflow and mechanical stress.

Switch-Mode Power Supply Feedback

Overvoltage Protection Clamp

Use Scenario: Used in optocoupler-coupled feedback loop of isolated AC/DC adapters to regulate 5 V or 12 V output.

IC Role / Device Role / Timing Role: Zener reference element setting TL431 cathode voltage threshold.

Use Value: 6.2 V nominal breakdown ensures stable regulation within ±5% across temperature and line/load variations.

Use Scenario: Placed across microcontroller I/O rail to clamp transient spikes from relay switching or ESD events.

IC Role / Device Role / Timing Role: Shunt protection device limiting voltage to safe level below IC absolute maximum rating.

Use Value: Low leakage (<1 μA) avoids loading sensitive inputs; 1.0 W rating absorbs short-duration 100 ns–1 μs transients.

Precision Bias Reference

Industrial Sensor Excitation

Use Scenario: Supplies stable 6.2 V reference to op-amp input stage in 4–20 mA transmitter front-end.

IC Role / Device Role / Timing Role: Passive voltage reference source for ratiometric signal conditioning.

Use Value: ±5% tolerance and <35 Ω impedance minimize offset drift and gain error in analog signal chains.

Use Scenario: Powers resistive bridge sensors (e.g., strain gauges) in factory automation load cells.

IC Role / Device Role / Timing Role: Stable excitation source ensuring consistent sensor output scaling.

Use Value: Operation to +200°C allows integration near hot machinery; DO-41 glass withstands solder reflow and mechanical stress.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
1N4735A	Same 6.2 V nominal, ±5% tolerance, DO-41 package, but 1.0 W rating and 35 Ω Z_Z - functionally identical electrical specs	No difference in regulation, clamping, or biasing use cases; identical thermal and mounting requirements	Select when dual-sourcing or legacy design compatibility with 1N-series marking is required
MMBZ5234B	SMD SOT-23 package, same 6.2 V/±5%, but lower 0.35 W power rating and higher 17 Ω Z_Z - not interchangeable without layout change	Only suitable for space-constrained PCBs where DO-41 axial leads are unacceptable	Choose only if board area is critical and thermal load remains ≤350 mW; not a drop-in replacement

Compared with BZX85C6V2, the 1N4735A offers identical performance in the same DO-41 package and can be used interchangeably in through-hole designs, while the MMBZ5234B requires PCB redesign due to SMT packaging and reduced power handling-making it suitable only for low-power, high-density applications.

Availability

BZX85C6V2 is available at Aetrix Electronics and suitable for switch-mode power supplies, overvoltage protection circuits, precision bias references, and industrial sensor excitation requiring stable component supply and long-term manufacturability.

Supply support for BZX85C6V2 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

Fairchild Semiconductor was a U.S.-based semiconductor company specializing in power management, analog, and discrete components before its acquisition by ON Semiconductor in 2016.

The BZX85C series belongs to Fairchild's general-purpose Zener diode product line, engineered for reliable voltage regulation and reference in cost-sensitive industrial, consumer, and automotive auxiliary systems.

FAQ

What is the nominal Zener voltage of the BZX85C6V2?

The BZX85C6V2 has a nominal Zener voltage of 6.2 V, with a guaranteed range of 5.8 V to 6.6 V at test current I_Z = 4 mA and lead temperature of 30°C ±1°C. This value is confirmed in Fairchild's official BZX85C3V3–BZX85C56 datasheet Rev. 1.1.0, page 2, Electrical Characteristics table.

Is the BZX85C6V2 compatible with through-hole PCB assembly?

Yes, the BZX85C6V2 uses a DO-41 axial glass package with 0.86 mm diameter leads spaced 25.4 mm apart, fully compatible with standard through-hole wave soldering and manual insertion processes. The cathode is marked by a visible color band, enabling correct orientation during assembly of the BZX85C6V2.

What is the maximum power dissipation for the BZX85C6V2 at 75°C ambient?

At 75°C ambient, the BZX85C6V2 power dissipation is derated from 1.0 W at 25°C by 6.67 mW/°C for each degree above 50°C. From 50°C to 75°C is a 25°C rise, so derating is 25 × 6.67 mW = 166.75 mW. Thus, max P_D = 1000 mW − 166.75 mW = 833.25 mW - a value confirmed in the Absolute Maximum Ratings table of the BZX85C6V2 datasheet.

Does the BZX85C6V2 have a specified forward voltage?

Yes, the BZX85C6V2 specifies a maximum forward voltage of 1.2 V at forward current I_F = 200 mA, per the datasheet footnote on page 2. This parameter confirms standard silicon PN junction behavior and supports use in polarity-sensitive protection paths where forward conduction may occur, such as in bidirectional transient suppressor configurations involving the BZX85C6V2.

Can the BZX85C6V2 replace the BZX85C5V6 in a 6 V regulation circuit?

No - the BZX85C6V2 (5.8–6.6 V) and BZX85C5V6 (5.2–6.0 V) have non-overlapping Zener voltage ranges per their respective min/max specifications. Substituting BZX85C6V2 for BZX85C5V6 would raise the regulated voltage by up to 0.6 V, potentially exceeding downstream IC voltage limits. Circuit validation is required before interchanging any BZX85Cxx variant, including the BZX85C6V2.

BZX85C6V2 Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: DO-204AL, DO-41, Axial

Packaging:: Bulk

Product Status:: Active

Voltage - Zener (Nom) (Vz):: 6.2 V

Tolerance:: ±5%

Power - Max:: 1 W

Impedance (Max) (Zzt):: 4 Ohms

Current - Reverse Leakage @ Vr:: 1 µA @ 3 V

Voltage - Forward (Vf) (Max) @ If:: 1.2 V @ 200 mA

Operating Temperature:: -65°C ~ 200°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: DO-204AL (DO-41)

BZX85C6V2 FAQ

1.How can I place an order for BZX85C6V2 through Aetrix?

Please submit a Request for Quotation (RFQ) for BZX85C6V2 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 BZX85C6V2 reliable?

The price and inventory of BZX85C6V2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX85C6V2 is usually 5 days.

3.What payment methods are accepted for BZX85C6V2?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX85C6V2 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZX85C6V2?

BZX85C6V2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZX85C6V2 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 BZX85C6V2?

For technical support, including BZX85C6V2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX85C6V2 requirements.

6.How does Aetrix verify that BZX85C6V2 is sourced from the original manufacturer or authorized distributors?

All BZX85C6V2 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 BZX85C6V2 meets industry standards.

7.What is the process for return or replacement of BZX85C6V2?

All BZX85C6V2 units undergo pre-shipment inspection (PSI). If there is an issue with BZX85C6V2, 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 BZX85C6V2 part is unused and in its original packaging.

Return procedure for BZX85C6V2:

1.Submit a request within 90 days.

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

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