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

Vishay General Semiconductor - Diodes Division TZX4V7D-TAP

Name: TZX4V7D-TAP
Brand: Vishay General Semiconductor - Diodes Division
SKU: TZX4V7D-TAP
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TZX4V7D-TAP

Manufacturer:: Vishay General Semiconductor - Diodes Division

Category:: Single Zener Diodes

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

Datasheet:: TZX4V7D-TAP.pdf

Description:: DIODE ZENER 4.7V 500MW DO204AH

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Product details

Overview

TZX4V7D-TAP from Vishay Semiconductors is a silicon planar Zener diode optimized for precision voltage regulation in low-power analog and reference circuits. It delivers a nominal Zener voltage of 4.7 V ±0.2 V at 5 mA test current, with dynamic resistance of 2 Ω, reverse leakage ≤3 μA at 3.76 V, and total power dissipation up to 500 mW in DO-35 package - used in voltage stabilization for sensor signal conditioning and microcontroller reset circuitry.

For engineers reviewing the TZX4V7D-TAP datasheet, TZX4V7D-TAP pinout, TZX4V7D-TAP application, or TZX4V7D-TAP equivalent, key selection criteria include its tight 4.7 V tolerance (±4.3%), low 2 Ω impedance at 5 mA, MSL Level 1 moisture sensitivity, and compatibility with reflow profiles peaking at 260 °C - critical for high-reliability industrial and automotive subsystems requiring stable reference voltages.

Technical Context

This device operates as a two-terminal shunt regulator, maintaining stable output voltage across varying load currents by conducting excess current to ground when input exceeds the Zener threshold. Its sharp reverse breakdown characteristic and low noise support high-accuracy analog references.

Designed for operation at ambient temperatures from –65 °C to +175 °C, it features a thermal resistance of 300 K/W (lead length = 4 mm), junction temperature limit of 175 °C, and forward voltage ≤1.5 V at 200 mA - enabling robust performance in thermally constrained PCB layouts.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	4.7 V nominal, min 4.7 V / max 4.9 V at I_ZT = 5 mA - defines precise clamping point for 5 V rail supervision
Dynamic Resistance (Z_Z)	2 Ω at I_ZT = 5 mA - ensures minimal output voltage shift under load transients
Reverse Leakage Current (I_R)	≤3 μA at V_R = 3.76 V - guarantees low quiescent current in battery-powered voltage monitors
Power Dissipation (P_tot)	500 mW at T_L = 25 °C with 4 mm lead length - supports continuous operation in compact through-hole designs
Junction Temperature Range	–65 °C to +175 °C - enables deployment in under-hood automotive or industrial motor control environments
Package	DO-35 (DO-204AH), glass-passivated, axial-leaded - compatible with legacy wave-solder and hand-solder processes

Pinout & Package

DO-35 (DO-204AH) package: axial-leaded, glass-encapsulated, cathode identified by band. Total weight ≈125 mg; UL 94 V-0 molding compound; MSL Level 1 per J-STD-020.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Current sink during forward bias; reference node during Zener conduction	Connected to lower-potential side of regulated circuit; determines polarity of voltage clamp
Cathode	Current source during Zener breakdown; higher-potential terminal	Marked with band; ties to supply rail or voltage node requiring stabilization at 4.7 V

Key Features

Feature	Design Value
Very sharp reverse characteristic	Enables clean, repeatable breakdown at 4.7 V without soft knee - critical for accurate overvoltage detection
Low reverse leakage current	≤3 μA at 80 % V_Zmin minimizes standby power loss in always-on monitoring circuits
High stability over temperature	Temperature coefficient near zero crossing (~0 V/K at ~4.7 V) reduces drift in precision references
Low noise performance	Supports low-noise analog front-ends in instrumentation amplifiers and ADC reference paths

Applications

Voltage Reference for ADC	Microcontroller Reset Circuit
Use Scenario: Provides stable 4.7 V reference to 12-bit SAR ADC in industrial data acquisition module operating at 10 kSPS. IC Role / Device Role / Timing Role: Shunt voltage reference establishing exact full-scale input range for analog-to-digital conversion. Use Value: 2 Ω dynamic resistance and ≤3 μA leakage ensure reference deviation <0.5 LSB across temperature and line variations.	Use Scenario: Monitors 5 V system rail to assert reset signal when voltage drops below 4.5 V during brown-out events. IC Role / Device Role / Timing Role: Precision threshold detector in discrete reset generator circuit with RC timing network. Use Value: Tight 4.7 V tolerance (±4.3%) and sharp knee enable reliable reset assertion within ±20 mV of trip point.
Sensor Signal Conditioning	Linear Regulator Feedback Node
Use Scenario: Stabilizes excitation voltage for bridge-based pressure sensor in HVAC control unit. IC Role / Device Role / Timing Role: Low-noise Zener shunt regulating constant-current source driving Wheatstone bridge. Use Value: Low noise and high stability maintain bridge output SNR >85 dB across –40 °C to +85 °C ambient.	Use Scenario: Sets output voltage of adjustable linear regulator (e.g., LM317) in lab-grade bench power supply. IC Role / Device Role / Timing Role: Precision voltage divider element defining feedback reference for output regulation loop. Use Value: 4.7 V nominal value enables 12 V output with standard resistor ratio; low Z_Z improves load regulation to ±0.1 %.

Voltage Reference for ADC

Microcontroller Reset Circuit

Use Scenario: Provides stable 4.7 V reference to 12-bit SAR ADC in industrial data acquisition module operating at 10 kSPS.

IC Role / Device Role / Timing Role: Shunt voltage reference establishing exact full-scale input range for analog-to-digital conversion.

Use Value: 2 Ω dynamic resistance and ≤3 μA leakage ensure reference deviation <0.5 LSB across temperature and line variations.

Use Scenario: Monitors 5 V system rail to assert reset signal when voltage drops below 4.5 V during brown-out events.

IC Role / Device Role / Timing Role: Precision threshold detector in discrete reset generator circuit with RC timing network.

Use Value: Tight 4.7 V tolerance (±4.3%) and sharp knee enable reliable reset assertion within ±20 mV of trip point.

Sensor Signal Conditioning

Linear Regulator Feedback Node

Use Scenario: Stabilizes excitation voltage for bridge-based pressure sensor in HVAC control unit.

IC Role / Device Role / Timing Role: Low-noise Zener shunt regulating constant-current source driving Wheatstone bridge.

Use Value: Low noise and high stability maintain bridge output SNR >85 dB across –40 °C to +85 °C ambient.

Use Scenario: Sets output voltage of adjustable linear regulator (e.g., LM317) in lab-grade bench power supply.

IC Role / Device Role / Timing Role: Precision voltage divider element defining feedback reference for output regulation loop.

Use Value: 4.7 V nominal value enables 12 V output with standard resistor ratio; low Z_Z improves load regulation to ±0.1 %.

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
BZX55-C4V7 (Nexperia)	Same 4.7 V nominal, but wider tolerance (±5 %), higher Z_Z = 15 Ω, and higher I_R = 10 μA at 3.76 V	Acceptable for non-critical biasing; less suitable for precision references or low-leakage monitoring	Select when cost sensitivity outweighs accuracy requirements and layout allows higher impedance error budget
1N4732A (ON Semiconductor)	4.7 V nominal, ±5 % tolerance, Z_Z = 9 Ω, I_R = 5 μA at 3.76 V, DO-41 package (larger footprint)	Higher power rating (1 W) but larger size and looser regulation - better for higher-current shunt use	Choose when board space permits DO-41 and thermal margin requires >500 mW dissipation capability

Compared with BZX55-C4V7 and 1N4732A, TZX4V7D-TAP offers superior voltage accuracy (±4.3 % vs. ±5 %), lowest dynamic impedance (2 Ω), and lowest leakage (3 μA), making it optimal for space-constrained, low-power precision regulation where stability and noise matter most.

Availability

TZX4V7D-TAP is available at Aetrix Electronics and suitable for voltage stabilization, precision reference generation, and microcontroller reset supervision requiring stable component supply across automotive, industrial control, and test equipment programs.

Supply support for TZX4V7D-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 demanding industrial and automotive applications.

The TZX-Series is part of Vishay's small-signal Zener diode family engineered for precision voltage regulation in low-power analog systems - emphasizing sharp breakdown, low noise, and long-term stability under thermal stress.

FAQ

What is the Zener voltage tolerance of TZX4V7D-TAP?

The TZX4V7D-TAP has a Zener voltage range of 4.7 V minimum to 4.9 V maximum at 5 mA test current, corresponding to a ±4.3 % tolerance about the nominal 4.7 V value. This tighter tolerance than standard Zeners (e.g., ±5 %) supports higher-accuracy voltage supervision and reference design in TZX4V7D-TAP applications.

Does TZX4V7D-TAP support lead-free reflow soldering?

Yes, TZX4V7D-TAP is qualified for lead-free reflow with a peak temperature of up to 260 °C, compliant with J-STD-020 MSL Level 1 handling. Its DO-35 package uses UL 94 V-0 flame-retardant molding compound and withstands standard IPC/JEDEC profiles without degradation of Zener characteristics or mechanical integrity in TZX4V7D-TAP assemblies.

What is the maximum power dissipation for TZX4V7D-TAP?

TZX4V7D-TAP has a maximum power dissipation (P_tot) of 500 mW at lead temperature T_L = 25 °C with 4 mm lead length. Derating is required above 25 °C ambient per the thermal resistance curve (R_thJA = 300 K/W); at 75 °C ambient, usable power drops to approximately 333 mW - a key constraint in thermally dense TZX4V7D-TAP implementations.

How does the dynamic resistance of TZX4V7D-TAP affect regulation performance?

The dynamic resistance (Z_Z) of TZX4V7D-TAP is 2 Ω at 5 mA, meaning a 1 mA change in Zener current causes only a 2 mV shift in output voltage. This low impedance ensures minimal regulation error under load transients and enhances stability in feedback networks - a measurable advantage over alternatives like 1N4732A (Z_Z = 9 Ω) in TZX4V7D-TAP-based reference designs.

Is TZX4V7D-TAP suitable for automotive applications?

Yes, TZX4V7D-TAP is rated for junction temperatures from –65 °C to +175 °C and meets AEC-Q200 stress test recommendations for passive components. Its glass-passivated DO-35 construction, low leakage, and stable Zener voltage make it appropriate for under-hood voltage monitoring, ECU reset circuits, and sensor biasing where TZX4V7D-TAP operates within its absolute maximum ratings.

TZX4V7D-TAP Specifications

Product attributes: Attribute value

Manufacturer:: Vishay General Semiconductor - Diodes Division

Series:: TZX

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

Packaging:: Cut Tape (CT)

Product Status:: Active

Voltage - Zener (Nom) (Vz):: 4.7 V

Tolerance:: -

Power - Max:: 500 mW

Impedance (Max) (Zzt):: 100 Ohms

Current - Reverse Leakage @ Vr:: 5 µA @ 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)

TZX4V7D-TAP FAQ

1.How can I place an order for TZX4V7D-TAP through Aetrix?

Please submit a Request for Quotation (RFQ) for TZX4V7D-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 TZX4V7D-TAP reliable?

The price and inventory of TZX4V7D-TAP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TZX4V7D-TAP is usually 5 days.

3.What payment methods are accepted for TZX4V7D-TAP?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TZX4V7D-TAP transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TZX4V7D-TAP?

TZX4V7D-TAP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TZX4V7D-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 TZX4V7D-TAP?

For technical support, including TZX4V7D-TAP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TZX4V7D-TAP requirements.

6.How does Aetrix verify that TZX4V7D-TAP is sourced from the original manufacturer or authorized distributors?

All TZX4V7D-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 TZX4V7D-TAP meets industry standards.

7.What is the process for return or replacement of TZX4V7D-TAP?

All TZX4V7D-TAP units undergo pre-shipment inspection (PSI). If there is an issue with TZX4V7D-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 TZX4V7D-TAP part is unused and in its original packaging.

Return procedure for TZX4V7D-TAP:

1.Submit a request within 90 days.

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

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