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onsemi 1N4731A_S00Z
- Part No.:
- 1N4731A_S00Z
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4731A_S00Z.pdf
- Description:
- DIODE ZENER 4.3V 1W DO41
- Quantity:
- Payment:
- Shipping:
Inventory:2,350
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Product details
Overview
1N4731A_S00Z from ON Semiconductor is a 4.3 V, 1 W silicon Zener diode in DO-41 glass package, designed for precision voltage regulation and reference applications at 9 mA test current, with 58 Ω dynamic impedance and 1 μA leakage at 1 V reverse bias. It operates across -65°C to +200°C and supports stable DC biasing in power supply feedback loops.
For engineers reviewing the 1N4731A_S00Z datasheet, pinout, applications, or equivalent options, key selection criteria include nominal Zener voltage tolerance (±5%), thermal derating (6.67 mW/°C above 50°C), peak surge capability (1070 mA), and DO-41 mechanical compatibility in legacy through-hole designs.
Technical Context
The 1N4731A_S00Z functions as a two-terminal voltage reference device, maintaining a stable 4.3 V across its terminals when reverse-biased above its knee current (IZK = 1 mA) and within its 1 W power limit at TL ≤ 50°C. Its Zener impedance of 58 Ω at 9 mA ensures low output variation under moderate load changes.
It exhibits 1 μA maximum leakage current at VR = 1 V and withstands non-repetitive reverse surge currents up to 1070 mA (8.3 ms square wave), making it suitable for transient-suppressed regulator references and overvoltage clamping in low-power analog circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.3 V nominal at IZ = 9 mA - defines regulated output voltage in shunt regulator topologies |
| Power Dissipation (PD) | 1.0 W @ TL ≤ 50°C - sets maximum continuous DC power handling before thermal derating applies |
| Zener Impedance (ZZ) | 58 Ω @ IZ = 9 mA - determines output voltage stability under varying load current |
| Leakage Current (IR) | 1 μA max @ VR = 1 V - ensures minimal error current in high-impedance reference nodes |
| Operating Temp Range | -65°C to +200°C - enables use in automotive under-hood, industrial control, and aerospace environments |
| Surge Current (IZSM) | 1070 mA (8.3 ms) - provides margin against short-duration transients without failure |
Pinout & Package
DO-41 glass axial package with cathode band marking; leads are unmarked anode/cathode terminals - requires orientation verification via cathode band during PCB placement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference ground node | Connected to circuit common; establishes return path for Zener current |
| Cathode | Regulated output node | Provides stable 4.3 V relative to anode when reverse-biased above VZ |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance | Enables predictable regulation without post-manufacture trimming in cost-sensitive designs |
| DO-41 glass package | Supports automated axial insertion and reflow-compatible lead finishing per J-STD-020 |
| 1070 mA non-repetitive surge rating | Allows use in unregulated input stages without external surge limiting resistors |
| Low 1 μA leakage at 1 V | Minimizes loading error in high-resistance voltage divider references |
Applications
| Power Supply Feedback | Overvoltage Clamp |
|---|---|
Use Scenario: Regulating output voltage in linear or switching power supplies using optocoupler-coupled feedback. IC Role / Device Role / Timing Role: Zener reference element setting error amplifier threshold in secondary-side regulation loop. Use Value: Provides stable 4.3 V reference for TL431-compatible feedback networks with <58 Ω source impedance. |
Use Scenario: Protecting microcontroller I/O pins from ESD or inductive kickback in industrial sensors. IC Role / Device Role / Timing Role: Shunt clamp limiting voltage excursion to 4.3 V during transient events. Use Value: Absorbs up to 1070 mA surge without breakdown, preventing latch-up in 3.3 V/5 V logic interfaces. |
| Voltage Reference | Current Source Bias |
Use Scenario: Generating precise bias voltages for op-amp input stages or ADC reference dividers. IC Role / Device Role / Timing Role: Stable DC reference node in analog signal conditioning chains. Use Value: Delivers <1 % drift over -40°C to +85°C ambient due to low tempco and 1 μA leakage. |
Use Scenario: Setting constant current for LED drivers or sensor excitation circuits. IC Role / Device Role / Timing Role: Fixed-voltage drop element establishing emitter-base bias in transistor current mirrors. Use Value: Maintains 4.3 V across series resistor to yield repeatable current with ±5% tolerance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4731A (ON Semiconductor) | Same electrical specs and DO-41 package; differs only in traceability marking (no "_S00Z" suffix) | No functional difference; identical performance in all published test conditions | Select 1N4731A_S00Z when full lot traceability and ON Semiconductor's S00Z compliance marking are required |
| BZX55-C4V3 (Vishay) | 4.3 V ±5%, 500 mW rating, DO-35 package - lower power and smaller footprint | Not suitable for 1 W continuous operation; limited to <500 mW average dissipation | Choose BZX55-C4V3 only in space-constrained, low-power designs where thermal margin permits derating |
Compared with 1N4731A and BZX55-C4V3, the 1N4731A_S00Z offers full 1 W power handling in DO-41 with certified traceability, while BZX55-C4V3 trades power for size and lacks surge rating documentation at 1070 mA.
Availability
1N4731A_S00Z is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, and medical instrumentation requiring stable component supply with full lot traceability and ON Semiconductor compliance marking.
Supply support for 1N4731A_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, and cloud infrastructure markets.
The 1N47xxA series was developed for general-purpose, high-reliability Zener regulation in legacy and new-design through-hole applications, emphasizing wide temperature range, surge robustness, and tight voltage tolerance.
FAQ
What is the Zener voltage tolerance for 1N4731A_S00Z?
The 1N4731A_S00Z has a nominal Zener voltage of 4.3 V with a tolerance of ±5%, meaning the actual measured VZ falls between 4.085 V and 4.515 V at IZ = 9 mA and TA = 25°C. This tolerance is guaranteed per ON Semiconductor's 1N4728A–1N4758A datasheet Rev. 8 and applies to every unit shipped as 1N4731A_S00Z.
Does 1N4731A_S00Z have the same electrical specs as standard 1N4731A?
Yes - the 1N4731A_S00Z shares identical electrical specifications with the base 1N4731A, including VZ, IZ, ZZ, PD, and surge rating. The "_S00Z" suffix denotes enhanced traceability and compliance marking per ON Semiconductor's internal quality program, not a functional revision. All test data in the 1N4728A–1N4758A datasheet apply directly to 1N4731A_S00Z.
What is the maximum allowable junction temperature for 1N4731A_S00Z?
The 1N4731A_S00Z has a maximum junction temperature (TJ) of +200°C, matching its storage temperature limit. This rating is specified in the Absolute Maximum Ratings table of the ON Semiconductor datasheet and allows operation in high-ambient environments such as engine control units or industrial motor drives when mounted with appropriate thermal relief.
Can 1N4731A_S00Z be used in surface-mount designs?
No - the 1N4731A_S00Z uses a DO-41 axial glass package intended for through-hole mounting. It lacks solder pads or gull-wing leads required for SMT assembly. For surface-mount equivalents, consider ON Semiconductor's NZ9F4V3 or similar SOD-123 Zeners, but note differences in power rating, impedance, and surge capability versus the 1N4731A_S00Z.
What does the "S00Z" suffix mean in 1N4731A_S00Z?
The "_S00Z" suffix identifies a traceable, ON Semiconductor-certified variant of the 1N4731A with enhanced manufacturing documentation, lot-level serialization, and compliance with specific internal quality protocols. It does not alter electrical behavior but ensures full auditability for automotive or medical BOMs where component pedigree is mandatory. The 1N4731A_S00Z remains functionally identical to 1N4731A in all circuits.
1N4731A_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):
- 4.3 V
- Tolerance:
- ±5%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 9 Ohms
- Current - Reverse Leakage @ Vr:
- 10 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
1N4731A_S00Z FAQ
1.How can I place an order for 1N4731A_S00Z through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4731A_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 1N4731A_S00Z reliable?
The price and inventory of 1N4731A_S00Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4731A_S00Z is usually 5 days.
3.What payment methods are accepted for 1N4731A_S00Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4731A_S00Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4731A_S00Z?
1N4731A_S00Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4731A_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 1N4731A_S00Z?
For technical support, including 1N4731A_S00Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4731A_S00Z requirements.
6.How does Aetrix verify that 1N4731A_S00Z is sourced from the original manufacturer or authorized distributors?
All 1N4731A_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 1N4731A_S00Z meets industry standards.
7.What is the process for return or replacement of 1N4731A_S00Z?
All 1N4731A_S00Z units undergo pre-shipment inspection (PSI). If there is an issue with 1N4731A_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 1N4731A_S00Z part is unused and in its original packaging.
Return procedure for 1N4731A_S00Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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