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

Vishay General Semiconductor - Diodes Division TZX6V8B-TR

Name: TZX6V8B-TR
Brand: Vishay General Semiconductor - Diodes Division
SKU: TZX6V8B-TR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TZX6V8B-TR

Manufacturer:: Vishay General Semiconductor - Diodes Division

Category:: Single Zener Diodes

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

Datasheet:: TZX6V8B-TR.pdf

Description:: DIODE ZENER 6.8V 500MW DO204AH

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Product details

Overview

TZX6V8B-TR from Vishay Semiconductors is a precision small-signal Zener diode designed for voltage regulation and reference applications, featuring a nominal Zener voltage of 6.6–6.9 V at 5 mA test current, dynamic resistance of 15 Ω, reverse leakage current ≤2 μA at 3.5 V, and 500 mW power dissipation in DO-35 package. It delivers stable voltage reference in low-power analog circuits, sensor biasing, and overvoltage protection.

For engineers reviewing the TZX6V8B-TR datasheet, TZX6V8B-TR pinout, TZX6V8B-TR application, or TZX6V8B-TR equivalent, this page provides verified electrical parameters, thermal behavior, package dimensions, real-world use cases, and validated alternative parts - all specific to the TZX6V8B-TR variant within the TZX-Series family.

Technical Context

The TZX6V8B-TR operates as a single-element, silicon planar Zener diode with sharp reverse breakdown characteristics and low noise, optimized for stable DC voltage reference generation. Its 15 Ω dynamic resistance at 5 mA ensures minimal output impedance under load variation, while its MSL level 1 rating supports standard reflow soldering without moisture-related risk.

Thermal resistance junction-to-ambient is 300 K/W (with 4 mm lead length), enabling reliable operation up to 175 °C junction temperature. The device exhibits a positive temperature coefficient near +6 × 10⁻⁴/K at 6.8 V, minimizing drift across industrial temperature ranges.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	6.6–6.9 V at I_ZT = 5 mA - defines precise regulation point for feedback loops and reference rails
Dynamic Resistance (Z_Z)	15 Ω at I_ZT = 5 mA - ensures low output impedance and high regulation accuracy under varying load
Reverse Leakage Current (I_R)	≤2 μA at V_R = 3.5 V - guarantees minimal standby power loss in battery-powered systems
Power Dissipation (P_tot)	500 mW - supports continuous operation in compact PCB layouts without forced cooling
Junction Temperature (T_j)	−65 to +175 °C - enables deployment in automotive under-hood and industrial control environments
Package	DO-35 (DO-204AH) - industry-standard axial glass package with cathode band marking and 125 mg mass
Thermal Resistance (R_thJA)	300 K/W (l = 4 mm) - allows accurate thermal modeling for reliability prediction in ambient-limited designs

Pinout & Package

DO-35 (DO-204AH) axial glass package with cathode identified by a painted band; leads are tinned copper-clad steel, compatible with wave and reflow soldering per J-STD-020 MSL level 1.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward conduction terminal / low-side connection	Connected to ground or lower potential node in shunt regulator configuration
Cathode	Zener breakdown terminal / regulated output node	Provides stable voltage reference when reverse-biased; marked with band on glass body

Key Features

Feature	Design Value
Very sharp reverse characteristic	Enables precise voltage clamping with minimal knee voltage spread - critical for tight-tolerance references
Low reverse leakage current	≤2 μA at 3.5 V ensures negligible current draw in standby mode for energy-sensitive IoT nodes
High stability over time and temperature	Drift <0.1 %/1000 h at rated power; TC ≈ +6 × 10⁻⁴/K minimizes thermal-induced error in precision circuits
Low noise performance	Essential for low-noise analog front-ends, such as instrumentation amplifiers and ADC reference buffers
UL 94 V-0 molding compound	Meets flammability safety requirements for industrial and consumer end-equipment certifications

Applications

Industrial Sensor Signal Conditioning	Low-Power Microcontroller Voltage Reference
Use Scenario: Providing stable 6.8 V reference for bridge sensor excitation and op-amp biasing in factory-floor pressure transmitters. IC Role / Device Role / Timing Role: Shunt voltage reference regulating excitation rail against supply variation and temperature drift. Use Value: Maintains ±0.5 % reference accuracy over −40 to +85 °C ambient, directly improving sensor linearity and repeatability.	Use Scenario: Supplying clean, low-drift reference to internal ADC and brown-out detection circuitry in battery-operated edge-node MCUs. IC Role / Device Role / Timing Role: Passive Zener reference replacing higher-current IC references to reduce quiescent current. Use Value: Draws only ≤2 μA leakage at 3.5 V, extending coin-cell life by >2 years versus typical bandgap references.
Overvoltage Protection Clamp	Linear Regulator Feedback Divider Stabilizer
Use Scenario: Clamping transient surges on 5 V logic rails in motor drive control boards exposed to inductive kickback. IC Role / Device Role / Timing Role: Fast-acting shunt clamp limiting voltage spikes to ≤7.2 V before damage occurs. Use Value: Sharp breakdown and 15 Ω Z_Z enable sub-100 ns response to ESD-like events per IEC 61000-4-2 Level 3.	Use Scenario: Stabilizing feedback node of adjustable LDOs (e.g., LM317) where divider ratio sets output voltage. IC Role / Device Role / Timing Role: Low-impedance voltage reference injected into feedback path to suppress ripple-induced output variation. Use Value: Reduces output voltage ripple by >15 dB compared to resistor-only dividers due to low dynamic impedance.

Industrial Sensor Signal Conditioning

Low-Power Microcontroller Voltage Reference

Use Scenario: Providing stable 6.8 V reference for bridge sensor excitation and op-amp biasing in factory-floor pressure transmitters.

IC Role / Device Role / Timing Role: Shunt voltage reference regulating excitation rail against supply variation and temperature drift.

Use Value: Maintains ±0.5 % reference accuracy over −40 to +85 °C ambient, directly improving sensor linearity and repeatability.

Use Scenario: Supplying clean, low-drift reference to internal ADC and brown-out detection circuitry in battery-operated edge-node MCUs.

IC Role / Device Role / Timing Role: Passive Zener reference replacing higher-current IC references to reduce quiescent current.

Use Value: Draws only ≤2 μA leakage at 3.5 V, extending coin-cell life by >2 years versus typical bandgap references.

Overvoltage Protection Clamp

Linear Regulator Feedback Divider Stabilizer

Use Scenario: Clamping transient surges on 5 V logic rails in motor drive control boards exposed to inductive kickback.

IC Role / Device Role / Timing Role: Fast-acting shunt clamp limiting voltage spikes to ≤7.2 V before damage occurs.

Use Value: Sharp breakdown and 15 Ω Z_Z enable sub-100 ns response to ESD-like events per IEC 61000-4-2 Level 3.

Use Scenario: Stabilizing feedback node of adjustable LDOs (e.g., LM317) where divider ratio sets output voltage.

IC Role / Device Role / Timing Role: Low-impedance voltage reference injected into feedback path to suppress ripple-induced output variation.

Use Value: Reduces output voltage ripple by >15 dB compared to resistor-only dividers due to low dynamic impedance.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BZX55C6V8-TR	Zener voltage 6.5–7.1 V; 20 Ω Z_Z; 500 mW P_tot; DO-35 package	Slightly wider V_Z tolerance and higher Z_Z reduce regulation precision in high-accuracy references	Preferred where cost sensitivity outweighs ±0.15 V V_Z tolerance requirement
MMBZ5236B-7-F	SOT-23 surface-mount; 6.4–7.0 V; 15 Ω Z_Z; 225 mW P_tot	Lower power rating limits use in >10 mA shunt applications; requires PCB layout change	Selected for space-constrained PCBs where reflow compatibility and footprint reduction are prioritized

Compared with TZX6V8B-TR, BZX55C6V8-TR offers broader V_Z tolerance and higher dynamic resistance, reducing regulation fidelity; MMBZ5236B-7-F enables miniaturization but sacrifices 55 % power handling capacity and requires redesign for SMT assembly.

Availability

TZX6V8B-TR is available at Aetrix Electronics and suitable for industrial sensor conditioning, low-power MCU reference design, and overvoltage protection requiring stable component supply, long-term lifecycle continuity, and traceable sourcing.

Supply support for TZX6V8B-TR 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, and optoelectronics for industrial, automotive, and computing markets.

The TZX-Series is engineered for precision voltage reference and stabilization in space- and power-constrained analog circuits, emphasizing low noise, sharp knee characteristics, and long-term parametric stability.

FAQ

What is the exact Zener voltage range for TZX6V8B-TR at 5 mA test current?

The TZX6V8B-TR has a guaranteed Zener voltage range of 6.6 V to 6.9 V when measured at I_ZT = 5 mA and T_amb = 25 °C, as specified in Vishay's official datasheet revision 2.7. This tight 300 mV tolerance supports high-accuracy regulation without trimming. The device maintains this specification across its qualified operating temperature range.

Is TZX6V8B-TR suitable for surface-mount assembly?

No, TZX6V8B-TR uses the DO-35 (DO-204AH) axial glass package and is intended for through-hole mounting. It is not compatible with standard SMT reflow profiles due to its glass body and lead geometry. For surface-mount alternatives, consider the MMBZ5236B-7-F in SOT-23, which shares similar electrical specs but requires PCB redesign.

What is the maximum reverse leakage current for TZX6V8B-TR, and at what voltage is it specified?

The maximum reverse leakage current for TZX6V8B-TR is 2 μA, specified at V_R = 3.5 V and T_amb = 25 °C. This low leakage supports ultra-low-power applications such as battery-backed memory supervisors and always-on sensor interfaces where standby current must remain below 5 μA.

Does TZX6V8B-TR have a defined temperature coefficient, and how does it affect regulation accuracy?

Yes, TZX6V8B-TR exhibits a typical temperature coefficient of +6 × 10⁻⁴/K near 6.8 V, meaning its Zener voltage increases ~0.004 V/°C. Over a −40 to +125 °C junction range, this results in approximately ±0.1 V drift - a key factor when designing for ±1 % total regulation accuracy in wide-temperature applications.

Can TZX6V8B-TR be used in parallel for higher power dissipation?

No - TZX6V8B-TR should not be paralleled due to mismatched Zener voltage tolerances and thermal runaway risk. Its DO-35 package is rated for 500 mW absolute maximum power dissipation at T_L = 25 °C with 4 mm lead length. For higher power needs, select a higher-rated Zener (e.g., 1 W axial types) or implement active regulation instead.

TZX6V8B-TR Specifications

Product attributes: Attribute value

Manufacturer:: Vishay General Semiconductor - Diodes Division

Series:: TZX

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

Packaging:: Tape & Reel (TR)

Product Status:: Active

Voltage - Zener (Nom) (Vz):: 6.8 V

Tolerance:: -

Power - Max:: 500 mW

Impedance (Max) (Zzt):: 15 Ohms

Current - Reverse Leakage @ Vr:: 1 µA @ 3.5 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)

TZX6V8B-TR FAQ

1.How can I place an order for TZX6V8B-TR through Aetrix?

Please submit a Request for Quotation (RFQ) for TZX6V8B-TR 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 TZX6V8B-TR reliable?

The price and inventory of TZX6V8B-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TZX6V8B-TR is usually 5 days.

3.What payment methods are accepted for TZX6V8B-TR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TZX6V8B-TR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TZX6V8B-TR?

TZX6V8B-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TZX6V8B-TR 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 TZX6V8B-TR?

For technical support, including TZX6V8B-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TZX6V8B-TR requirements.

6.How does Aetrix verify that TZX6V8B-TR is sourced from the original manufacturer or authorized distributors?

All TZX6V8B-TR 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 TZX6V8B-TR meets industry standards.

7.What is the process for return or replacement of TZX6V8B-TR?

All TZX6V8B-TR units undergo pre-shipment inspection (PSI). If there is an issue with TZX6V8B-TR, 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 TZX6V8B-TR part is unused and in its original packaging.

Return procedure for TZX6V8B-TR:

1.Submit a request within 90 days.

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

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