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

onsemi 1N4730A_S00Z

Name: 1N4730A_S00Z
Brand: onsemi
SKU: 1N4730A_S00Z
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 1N4730A_S00Z

Manufacturer:: onsemi

Category:: Single Zener Diodes

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

Datasheet:: 1N4730A_S00Z.pdf

Description:: DIODE ZENER 3.9V 1W DO41

Quantity:: RFQ Add To RFQ list

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Inventory:6,859

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Product details

Overview

1N4730A_S00Z from ON Semiconductor is a 3.9 V ±5% Zener diode in DO-41 glass package, rated for 1.0 W power dissipation at TL ≤ 50°C with 6.67 mW/°C derating, designed for precision voltage regulation and reference applications in power supply feedback loops and overvoltage protection circuits.

For engineers reviewing the 1N4730A_S00Z datasheet, pinout, applications, or equivalent options, key selection criteria include zener voltage tolerance (±5%), dynamic impedance (64 Ω @ 20 mA), leakage current (1 μA @ 1 V), operating temperature range (−65°C to +200°C), and DO-41 mechanical compatibility.

Technical Context

The 1N4730A_S00Z operates as a silicon planar Zener diode with sharp reverse breakdown at nominal 3.9 V, specified under thermal equilibrium conditions at lead temperature of 30°C ±1°C and 3/8″ lead length. Its design supports stable DC voltage reference generation with low dynamic impedance and tightly controlled voltage tolerance.

It exhibits a maximum zener impedance of 64 Ω at test current I_Z = 20 mA and knee impedance Z_ZK = 9 Ω at I_ZK = 1 mA, with leakage current limited to 1 μA at VR = 1 V and non-repetitive peak reverse surge current rating of 1190 mA (8.3 ms square wave).

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	3.9 V nominal, min 3.705 V / max 4.095 V - defines regulated output voltage under 20 mA test current
Power Dissipation (P_D)	1.0 W @ T_L ≤ 50°C - sets maximum continuous power handling before thermal derating begins
Zener Impedance (Z_Z)	64 Ω @ I_Z = 20 mA - determines AC voltage regulation stability under load variation
Leakage Current (I_R)	1 μA @ V_R = 1 V - ensures minimal parasitic current draw in standby or high-impedance bias networks
Operating Temperature	−65°C to +200°C - enables use in automotive under-hood, industrial control, and aerospace environments
Tolerance	±5% - guarantees voltage accuracy without post-manufacture trimming

Pinout & Package

DO-41 glass axial package with cathode indicated by color band; two-terminal device requiring no orientation-specific PCB layout beyond cathode/anode polarity alignment.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward conduction terminal / Zener cathode reference ground node	Connected to lower-potential side in reverse-biased regulation configuration; serves as return path for zener current
Cathode	Reverse breakdown terminal / regulated output node	Connected to higher-potential side; delivers stable 3.9 V reference when reverse biased above breakdown threshold

Key Features

Feature	Design Value
Stable Zener voltage with tight tolerance	±5% V_Z ensures predictable regulation without calibration in cost-sensitive designs
Low dynamic impedance	64 Ω @ 20 mA minimizes output voltage variation under changing load currents
High surge current capability	1190 mA non-repetitive peak reverse current supports transient overvoltage clamping
Wide temperature operation	−65°C to +200°C junction range allows deployment in extreme environmental conditions

Applications

Switch-Mode Power Supply Feedback	Microcontroller Voltage Reference
Use Scenario: Used in optocoupler-coupled feedback loop of isolated DC-DC converters to regulate output voltage. IC Role / Device Role / Timing Role: Provides precise 3.9 V reference for TL431 or similar shunt regulator IC input. Use Value: Enables ±1% output regulation accuracy across line/load/temperature with minimal external components.	Use Scenario: Supplies stable reference to ADC or internal bandgap circuitry in low-power microcontrollers. IC Role / Device Role / Timing Role: Acts as external precision voltage reference replacing less accurate internal references. Use Value: Improves ADC measurement repeatability by reducing reference drift over temperature (−65°C to +200°C).
Overvoltage Protection Clamp	Industrial Sensor Signal Conditioning
Use Scenario: Placed across sensitive inputs to clamp transients exceeding 4.7 V during ESD or inductive switching events. IC Role / Device Role / Timing Role: Functions as passive crowbar element limiting voltage excursion on analog front-end pins. Use Value: Absorbs 1190 mA surge (8.3 ms) without failure, protecting downstream op-amps or ADCs.	Use Scenario: Stabilizes excitation voltage for resistive bridge sensors in process control transmitters. IC Role / Device Role / Timing Role: Delivers low-noise, temperature-stable bias to Wheatstone bridge arms. Use Value: Reduces sensor offset drift by maintaining 3.9 V ±5% across −40°C to +85°C ambient range.

Switch-Mode Power Supply Feedback

Microcontroller Voltage Reference

Use Scenario: Used in optocoupler-coupled feedback loop of isolated DC-DC converters to regulate output voltage.

IC Role / Device Role / Timing Role: Provides precise 3.9 V reference for TL431 or similar shunt regulator IC input.

Use Value: Enables ±1% output regulation accuracy across line/load/temperature with minimal external components.

Use Scenario: Supplies stable reference to ADC or internal bandgap circuitry in low-power microcontrollers.

IC Role / Device Role / Timing Role: Acts as external precision voltage reference replacing less accurate internal references.

Use Value: Improves ADC measurement repeatability by reducing reference drift over temperature (−65°C to +200°C).

Overvoltage Protection Clamp

Industrial Sensor Signal Conditioning

Use Scenario: Placed across sensitive inputs to clamp transients exceeding 4.7 V during ESD or inductive switching events.

IC Role / Device Role / Timing Role: Functions as passive crowbar element limiting voltage excursion on analog front-end pins.

Use Value: Absorbs 1190 mA surge (8.3 ms) without failure, protecting downstream op-amps or ADCs.

Use Scenario: Stabilizes excitation voltage for resistive bridge sensors in process control transmitters.

IC Role / Device Role / Timing Role: Delivers low-noise, temperature-stable bias to Wheatstone bridge arms.

Use Value: Reduces sensor offset drift by maintaining 3.9 V ±5% across −40°C to +85°C ambient range.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
1N4730A	Same electrical specs and DO-41 package; no S00Z suffix - standard marking variant	No functional difference; identical performance in all published test conditions	Select 1N4730A_S00Z only if specific top-marking compliance (XY date code, ON logo) is required per BOM or audit traceability
BZX55-C3V9	3.9 V ±5%, DO-35 package, 500 mW rating, higher Z_Z (90 Ω)	Lower power handling and larger impedance limit use in high-current or precision regulation roles	Choose BZX55-C3V9 only for space-constrained layouts where 500 mW suffices and DO-35 footprint is preferred

Compared with 1N4730A_S00Z, the base 1N4730A offers identical electrical behavior but lacks the S00Z-specific top-marking format, while BZX55-C3V9 trades power rating and impedance for smaller DO-35 packaging - making 1N4730A_S00Z optimal for 1 W, low-Z, DO-41-requiring designs.

Availability

1N4730A_S00Z is available at Aetrix Electronics and suitable for switch-mode power supplies, microcontroller reference circuits, overvoltage protection clamps, and industrial sensor signal conditioning requiring stable component supply and full traceability.

Supply support for 1N4730A_S00Z 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

ON Semiconductor is a global semiconductor manufacturer specializing in energy-efficient power management, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.

The 1N47xxA series was developed for general-purpose, high-reliability Zener regulation in cost-sensitive, high-volume applications - emphasizing wide temperature range, tight voltage tolerance, and robust surge capability.

FAQ

What is the nominal Zener voltage of the 1N4730A_S00Z?

The 1N4730A_S00Z has a nominal Zener voltage of 3.9 V, with a guaranteed range of 3.705 V to 4.095 V at 20 mA test current and ±5% tolerance. This value is measured under thermal equilibrium at lead temperature of 30°C ±1°C with 3/8″ lead length, per ON Semiconductor's 1N4728A–1N4758A datasheet Rev. 8.

Does the 1N4730A_S00Z have a specified Zener impedance?

Yes, the 1N4730A_S00Z has a maximum Zener impedance (Z_Z) of 64 Ω at I_Z = 20 mA and a knee impedance (Z_ZK) of 9 Ω at I_ZK = 1 mA. These values are critical for assessing regulation stability under varying load conditions and are confirmed in the Electrical Characteristics table of the official ON Semiconductor datasheet.

What is the maximum power dissipation rating for the 1N4730A_S00Z?

The 1N4730A_S00Z is rated for 1.0 W power dissipation at lead temperature (T_L) ≤ 50°C, with a linear derating factor of 6.67 mW/°C above that temperature. This rating assumes 3/8″ lead length and is defined in the Absolute Maximum Ratings section of the ON Semiconductor 1N4728A–1N4758A datasheet.

What package type does the 1N4730A_S00Z use?

The 1N4730A_S00Z uses the DO-41 glass axial package, identified by a cathode band marking and standardized mechanical dimensions. The DO-41 outline is explicitly stated in the "Top Mark Information" section of the ON Semiconductor datasheet and confirmed across all 1N47xxA family documentation.

What is the operating temperature range for the 1N4730A_S00Z?

The 1N4730A_S00Z has an operating and storage temperature range of −65°C to +200°C, as specified in the Absolute Maximum Ratings table. This wide range supports deployment in harsh environments including automotive under-hood systems, industrial motor controls, and downhole instrumentation where thermal extremes are common.

1N4730A_S00Z Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

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

Packaging:: Bulk

Product Status:: Obsolete

Voltage - Zener (Nom) (Vz):: 3.9 V

Tolerance:: ±5%

Power - Max:: 1 W

Impedance (Max) (Zzt):: 9 Ohms

Current - Reverse Leakage @ Vr:: 50 µA @ 1 V

Voltage - Forward (Vf) (Max) @ If:: -

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: DO-41

1N4730A_S00Z FAQ

1.How can I place an order for 1N4730A_S00Z through Aetrix?

Please submit a Request for Quotation (RFQ) for 1N4730A_S00Z 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 1N4730A_S00Z reliable?

The price and inventory of 1N4730A_S00Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4730A_S00Z is usually 5 days.

3.What payment methods are accepted for 1N4730A_S00Z?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4730A_S00Z transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 1N4730A_S00Z?

1N4730A_S00Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 1N4730A_S00Z 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 1N4730A_S00Z?

For technical support, including 1N4730A_S00Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4730A_S00Z requirements.

6.How does Aetrix verify that 1N4730A_S00Z is sourced from the original manufacturer or authorized distributors?

All 1N4730A_S00Z 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 1N4730A_S00Z meets industry standards.

7.What is the process for return or replacement of 1N4730A_S00Z?

All 1N4730A_S00Z units undergo pre-shipment inspection (PSI). If there is an issue with 1N4730A_S00Z, 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 1N4730A_S00Z part is unused and in its original packaging.

Return procedure for 1N4730A_S00Z:

1.Submit a request within 90 days.

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

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