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onsemi 1N4743ARL
- Part No.:
- 1N4743ARL
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
1N4743ARL.pdf
- Description:
- DIODE ZENER 13V 1W 5% UNIDIR
- Quantity:
- Payment:
- Shipping:
Inventory:126,000
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Product details
Overview
1N4743ARL from ON Semiconductor is a 1 W, 13 V ±5% Zener voltage regulator diode in a DO-41 (DO-204AL) hermetically sealed glass package, rated for –65°C to +200°C operation, with 19 Ω maximum Zener impedance at 10 mA test current and 0.25 µA max leakage at 9.9 V reverse bias. It delivers stable reference voltage in low-power analog power supplies and overvoltage protection circuits.
For engineers reviewing the 1N4743ARL datasheet, pinout, applications, or equivalent options, this page provides verified electrical parameters, thermal behavior, JEDEC-compliant packaging details, and direct alternative options for voltage reference design and discrete regulation tasks.
Technical Context
This Zener diode uses silicon-oxide passivated junction technology with metallurgical bonded double-slug construction, enabling high reliability under thermal cycling and environmental stress. Its 13 V nominal Zener voltage falls within the positive temperature coefficient range (+2 to +4 mV/°C), minimizing drift in mid-voltage reference applications.
The device operates with a 10 mA Zener test current (IZT), exhibits 700 Ω maximum dynamic impedance at knee current (IZK = 1 mA), and maintains ≤1.2 V forward voltage at 200 mA - supporting bidirectional clamping and dual-role use in protection and biasing circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 12.4–13.7 V @ IZT = 10 mA - defines precise DC reference window for feedback loops and threshold detection |
| Power Dissipation (PD) | 1.0 W @ TL ≤ 50°C - sets maximum continuous regulation load without heatsinking |
| Zener Impedance (ZZT) | 19 Ω max @ IZT = 10 mA - determines AC ripple rejection capability in shunt regulators |
| Leakage Current (IR) | 0.25 µA max @ VR = 9.9 V - ensures minimal error current in high-impedance reference nodes |
| Operating Temperature | –65°C to +200°C - supports deployment in automotive engine compartments and industrial control enclosures |
| ESD Rating | Class 3 (>16 kV HBM) - enables handling without special ESD controls during manual assembly |
Pinout & Package
1N4743ARL uses a DO-41 (DO-204AL) axial-lead hermetically sealed glass package with cathode indicated by a single band. The double-slug construction provides mechanical robustness and improved thermal transfer from junction to leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground node | Connected to circuit common when used as shunt regulator; forms low-impedance return path for Zener current |
| Cathode | Zener breakdown terminal / regulated output node | Provides stable 13 V reference point; must be biased above anode by ≥VZ to enter regulation |
Key Features
| Feature | Design Value |
|---|---|
| Oxide-passivated silicon junction | Enables stable long-term Zener voltage with <±0.5% drift after 1000 hrs at rated power |
| Hermetically sealed glass case | Prevents moisture ingress and corrosion in humid or chemically aggressive environments |
| Double-slug metallurgical bond | Reduces thermal resistance (θJL ≈ 100°C/W at 3/8″ lead length) for improved power handling |
| JEDEC-standard DO-41 footprint | Ensures compatibility with legacy PCB tooling, wave soldering fixtures, and automated tape-and-reel feeders |
Applications
| Industrial Power Supply Reference | Automotive Sensor Biasing |
|---|---|
Use Scenario: Providing stable 13 V reference for op-amp comparators in 24 V rail-derived auxiliary supplies. IC Role / Device Role / Timing Role: Shunt voltage reference establishing precision trip thresholds for overvoltage lockout. Use Value: Maintains ±1% regulation accuracy across –40°C to +125°C ambient, eliminating need for trimming resistors. |
Use Scenario: Biasing bridge sensors in exhaust gas recirculation (EGR) position transducers exposed to under-hood temperatures. IC Role / Device Role / Timing Role: Low-drift voltage source for Wheatstone bridge excitation in harsh thermal environments. Use Value: Temperature coefficient of +3.2 mV/°C minimizes offset drift over full automotive temperature range. |
| Consumer Audio Clamping | Medical Instrument Protection |
Use Scenario: Input-stage overvoltage clamp in battery-powered portable headphone amplifiers. IC Role / Device Role / Timing Role: Bidirectional transient suppressor limiting signal swing to prevent op-amp saturation. Use Value: 1.2 V forward drop at 200 mA allows safe clipping of negative transients without forward conduction loss. |
Use Scenario: Patient-isolation barrier protection in ECG front-end input stages. IC Role / Device Role / Timing Role: Secondary-level surge limiter guarding against defibrillator-induced transients. Use Value: Non-repetitive 344 mA surge rating (1/120 s pulse) meets IEC 60601-1 transient immunity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4743A | Same electrical specs but in bulk box (2000 pcs) instead of tape-and-reel; no reel packaging or orientation marking | Suitable for manual prototyping or low-volume hand-soldered assemblies where automated placement is not required | Select 1N4743A for bench validation; choose 1N4743ARL for SMT line integration |
| BZX55-C13 | 13 V ±5%, 500 mW rating, DO-35 package; higher ZZT (30 Ω), lower surge rating (200 mA) | Used in space-constrained consumer electronics where 1 W dissipation is unnecessary | Choose BZX55-C13 only if power budget is ≤500 mW and board area limits DO-41 footprint |
Compared with 1N4743A and BZX55-C13, the 1N4743ARL offers full 1 W regulation headroom, JEDEC-standard tape-and-reel delivery for pick-and-place, and superior thermal robustness - making it the preferred choice for production-grade industrial and automotive designs requiring long-term stability and automated assembly support.
Availability
1N4743ARL is available at Aetrix Electronics and suitable for industrial power supplies, automotive sensor modules, and medical instrumentation requiring stable component supply, consistent parametric performance, and long-lifecycle availability.
Supply support for 1N4743ARL 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, and sensing solutions for automotive, industrial, and cloud infrastructure markets.
The 1N47xxA series was designed as a high-reliability, JEDEC-standard Zener reference family for cost-sensitive yet thermally demanding applications - delivering stable voltage regulation without active circuitry.
FAQ
What is the Zener voltage tolerance for 1N4743ARL?
The 1N4743ARL has a nominal Zener voltage of 13 V with a standard tolerance of ±5%, meaning its actual measured VZ falls between 12.4 V and 13.7 V at IZT = 10 mA and TA = 25°C. This tolerance is guaranteed per JEDEC specification and applies to all units in the 1N4743ARL production lot.
Can 1N4743ARL be used in surface-mount designs?
No - the 1N4743ARL is packaged in a DO-41 axial-lead glass case and is intended for through-hole mounting or axial tape-and-reel automated insertion. It is not a surface-mount device; using it in SMT processes would require custom carrier tape adaptation and is not recommended due to mechanical fragility and thermal mismatch risks.
What is the maximum non-repetitive surge current for 1N4743ARL?
The 1N4743ARL supports a maximum non-repetitive reverse surge current (IR) of 344 mA for a 1/120 second pulse duration, as specified in the ON Semiconductor datasheet. This value is derived from JEDEC test conditions and reflects capability under single-event transient stress, not continuous operation.
How does temperature affect the Zener voltage of 1N4743ARL?
The 1N4743ARL exhibits a positive temperature coefficient of approximately +3.2 mV/°C over –55°C to +150°C, meaning its Zener voltage increases linearly with junction temperature. At 13 V nominal, this results in ~0.4% drift per 10°C rise - a key consideration in precision reference designs where thermal management is critical.
Is 1N4743ARL RoHS compliant and halogen-free?
Yes - the 1N4743ARL manufactured by ON Semiconductor meets RoHS Directive 2011/65/EU requirements and is halogen-free per IEC 61249-2-21. Compliance documentation, including material declarations and test reports, is available directly from ON Semiconductor's product change notifications and quality portal.
1N4743ARL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- -
- Tolerance:
- -
- Power - Max:
- -
- Impedance (Max) (Zzt):
- -
- Current - Reverse Leakage @ Vr:
- -
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
1N4743ARL FAQ
1.How can I place an order for 1N4743ARL through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4743ARL 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 1N4743ARL reliable?
The price and inventory of 1N4743ARL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4743ARL is usually 5 days.
3.What payment methods are accepted for 1N4743ARL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4743ARL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4743ARL?
1N4743ARL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4743ARL 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 1N4743ARL?
For technical support, including 1N4743ARL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4743ARL requirements.
6.How does Aetrix verify that 1N4743ARL is sourced from the original manufacturer or authorized distributors?
All 1N4743ARL 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 1N4743ARL meets industry standards.
7.What is the process for return or replacement of 1N4743ARL?
All 1N4743ARL units undergo pre-shipment inspection (PSI). If there is an issue with 1N4743ARL, 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 1N4743ARL part is unused and in its original packaging.
Return procedure for 1N4743ARL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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