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

Nexperia USA Inc. 1N4743A,113

Name: 1N4743A,113
Brand: Nexperia USA Inc.
SKU: 1N4743A,113
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 1N4743A,113

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

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

Datasheet:: 1N4743A,113.pdf

Description:: DIODE ZENER 13V 1W DO41

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Inventory:4,068

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Product details

Overview

1N4743A,113 from Nexperia is a 13 V ±5 % Zener voltage regulator diode in a hermetically sealed SOD66 (DO-41) glass package, rated for 1000 mW total power dissipation and 500 mA maximum forward current, used for precision low-voltage stabilization in linear power supplies and reference circuits.

For engineers reviewing the 1N4743A,113 datasheet, 1N4743A,113 pinout, 1N4743A,113 application, or 1N4743A,113 equivalent, this page delivers verified electrical specs, cathode/anode terminal mapping, thermal resistance (110 K/W), working current (9.9 mA), and real-world use cases in analog voltage references and overvoltage protection.

Technical Context

This Zener diode operates in reverse breakdown to maintain a stable 13 V reference across load variations, with differential resistance of 10 Ω at test current and reverse leakage ≤5 µA at 10.4 V. It is characterized at T_j = 25 °C and thermally rated for junction temperatures from −65 °C to +200 °C.

The device uses axial-leaded, hermetically sealed glass construction (SOD66) with a marking band indicating the cathode. Its thermal resistance from junction to tie-point is 110 K/W (lead length 4 mm), enabling reliable operation under pulsed and continuous DC conditions up to 1000 mW.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	13 V nominal, ±5 % tolerance - ensures stable reference within 12.35–13.65 V at 19 mA test current
Total Power Dissipation (P_tot)	1000 mW max - supports continuous regulation in compact PCB layouts without forced cooling
Differential Resistance (r_dif)	10 Ω at I_Z = 19 mA - low impedance improves regulation against load transients
Reverse Current (I_R)	≤5 µA at V_R = 10.4 V - minimal leakage preserves accuracy in high-impedance reference nodes
Forward Voltage (V_F)	≤1.2 V at I_F = 200 mA - enables use as clamp or surge limiter in forward conduction mode
Junction Temperature Range	−65 °C to +200 °C - suitable for industrial and automotive under-hood environments

Pinout & Package

Hermetically sealed SOD66 (DO-41) axial glass package with 2 leads; cathode identified by a colored band on the body.

Pin/Terminal	Circuit Role	Design Meaning
1 (banded end)	Cathode	Connected to regulated output node; reverse-biased during Zener operation
2 (non-banded end)	Anode	Connected to ground or lower-potential rail; completes bias path for breakdown conduction

Key Features

Feature	Design Value
Hermetic glass sealing	Prevents moisture ingress and long-term parameter drift in humid or harsh environments
±5 % V_Z tolerance	Enables direct replacement in legacy designs without recalibration of feedback networks
1000 mW power rating	Supports >10 mA load currents in shunt regulator configurations without external heat sinking
Low r_dif (10 Ω)	Reduces output voltage variation under ±2 mA load changes - critical for precision references

Applications

Linear Power Supply Reference

Analog Sensor Signal Conditioning

Use Scenario: Stabilizing feedback voltage in 78xx-style linear regulators or discrete transistor-based shunt regulators.

IC Role / Device Role / Timing Role: Zener reference element providing fixed 13 V reference for error amplifier input.

Use Value: Maintains output regulation within ±2 % over line/load variations due to tight V_Z tolerance and low r_dif.

Use Scenario: Biasing op-amp input stages or setting common-mode voltage in 4–20 mA transmitter circuits.

IC Role / Device Role / Timing Role: Precision DC reference source for analog front-end calibration.

Use Value: Delivers <5 µA leakage at 10.4 V, minimizing offset errors in high-impedance sensor interfaces.

Overvoltage Clamp Protection

Microcontroller Reset Circuit

Use Scenario: Protecting ADC inputs or communication lines from transient surges exceeding 13 V.

IC Role / Device Role / Timing Role: Reverse-biased clamping diode diverting excess energy to ground.

Use Value: Responds within nanoseconds to transients while sustaining 1000 mW peak pulse power per IEC 61000-4-5.

Use Scenario: Generating a clean, temperature-stable reset threshold for 3.3 V or 5 V microcontrollers.

IC Role / Device Role / Timing Role: Voltage threshold detector in RC-based power-on reset (POR) networks.

Use Value: Stable 13 V Zener point allows precise resistor-divider scaling to match MCU reset voltage (e.g., 1.2 V or 2.5 V).

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
1N4743A-T	Same electrical specs; tape-and-reel packaging (vs. bulk/ammopack for ,113); RoHS-compliant plating	No functional difference; preferred for automated SMT assembly lines requiring reel-fed feeders	Select when using pick-and-place equipment and requiring full RoHS compliance documentation
BZX85C13	13 V Zener, ±5 %, but rated for 1300 mW P_tot; larger DO-41 variant with higher thermal mass	Better thermal stability under sustained 15 mA loads; less sensitive to ambient temperature rise	Choose for high-reliability industrial systems where margin above 1000 mW is required for derating

Compared with 1N4743A,113, the 1N4743A-T offers identical regulation performance in automated manufacturing contexts, while BZX85C13 provides higher power headroom and thermal robustness-making it preferable for continuous-duty analog references in unventilated enclosures.

Availability

1N4743A,113 is available at Aetrix Electronics and suitable for linear power supply references, analog sensor signal conditioning, overvoltage clamp protection, and microcontroller reset circuits requiring stable component supply and long-term parametric consistency.

Supply support for 1N4743A,113 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

Nexperia is a global semiconductor expert focused on high-volume, high-reliability logic, discrete, and MOSFET solutions, with roots in NXP's standard products division.

The 1N47xxA series belongs to Nexperia's precision Zener regulator portfolio, engineered for stable voltage reference and clamping in cost-sensitive industrial, consumer, and computing power systems.

FAQ

What is the maximum reverse voltage before breakdown for 1N4743A,113?

The nominal Zener voltage is 13 V with ±5 % tolerance, meaning breakdown occurs between 12.35 V and 13.65 V at the specified 19 mA test current. Below 10.4 V, reverse leakage remains ≤5 µA - no significant conduction occurs until near the rated V_Z.

Can 1N4743A,113 be used in surface-mount designs?

No - it uses an axial-leaded SOD66 (DO-41) glass package designed for through-hole mounting. For SMT equivalents, consider Nexperia's BZX384-B13 (SOD-323, 13 V, ±2 %) or MMBZ4684 (SOT-23), which require different layout and thermal design.

How does thermal resistance affect regulation accuracy?

With R_th(j-t) = 110 K/W, a 1000 mW dissipation raises junction temperature by ~110 °C above ambient. Since V_Z has a positive temperature coefficient (~0.07 %/°C for 13 V parts), this causes ~0.8 V upward drift - requiring derating or heatsinking in high-ambient environments.

Is 1N4743A,113 suitable for automotive applications?

Yes - its −65 °C to +200 °C junction temperature range and hermetic glass construction meet AEC-Q200 stress requirements for passive components. However, system-level qualification (e.g., ISO 16750 testing) must be performed by the end customer for specific vehicle subsystems.

1N4743A,113 Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: -

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

Packaging:: Tape & Reel (TR)

Product Status:: Active

Voltage - Zener (Nom) (Vz):: 13 V

Tolerance:: ±5%

Power - Max:: 1 W

Impedance (Max) (Zzt):: 10 Ohms

Current - Reverse Leakage @ Vr:: 5 µA @ 9.9 V

Voltage - Forward (Vf) (Max) @ If:: 1.2 V @ 200 mA

Operating Temperature:: -65°C ~ 200°C

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: DO-41

1N4743A,113 FAQ

1.How can I place an order for 1N4743A,113 through Aetrix?

Please submit a Request for Quotation (RFQ) for 1N4743A,113 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 1N4743A,113 reliable?

The price and inventory of 1N4743A,113 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4743A,113 is usually 5 days.

3.What payment methods are accepted for 1N4743A,113?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4743A,113 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 1N4743A,113?

1N4743A,113 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 1N4743A,113 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 1N4743A,113?

For technical support, including 1N4743A,113 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4743A,113 requirements.

6.How does Aetrix verify that 1N4743A,113 is sourced from the original manufacturer or authorized distributors?

All 1N4743A,113 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 1N4743A,113 meets industry standards.

7.What is the process for return or replacement of 1N4743A,113?

All 1N4743A,113 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4743A,113, 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 1N4743A,113 part is unused and in its original packaging.

Return procedure for 1N4743A,113:

1.Submit a request within 90 days.

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

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