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

onsemi 1N5339B

Name: 1N5339B
Brand: onsemi
SKU: 1N5339B
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 1N5339B

Manufacturer:: onsemi

Category:: Single Zener Diodes

Package:: T-18, Axial

Datasheet:: 1N5339B.pdf

Description:: DIODE ZENER 5.6V 5W AXIAL

Quantity:: RFQ Add To RFQ list

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Inventory:7,519

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Product details

Overview

1N5339B from onsemi is a 5 W axial-lead Zener diode with nominal zener voltage of 5.6 V, ±5% tolerance, maximum zener impedance of 220 Ω at 1 mA test current, and surge rating of 865 A at 8.3 ms. It operates as a precision voltage reference or shunt regulator in low-power DC supply rails, overvoltage protection circuits, and voltage-clamping applications.

For engineers reviewing the 1N5339B datasheet, pinout, applications, or equivalent options, key selection criteria include its 5.6 V regulation point, 220 Ω dynamic impedance at IZT = 1 mA, 0.25 mA leakage current at VR = 13.4 V, 400 mA maximum DC zener current, and axial plastic CASE 017AA package compatibility with through-hole PCB assembly.

Technical Context

The 1N5339B employs a silicon-oxide passivated junction for stable zener breakdown and low leakage. Its thermal design relies on lead-to-ambient conduction, with junction-to-lead thermal resistance (θJL) rated at 25 °C/W at TL = 25 °C and 3/8″ lead length.

It delivers regulated voltage across a wide operating temperature range (−65 °C to +200 °C), with zener voltage temperature coefficient optimized for the 5–6 V range. The device meets Class 3 ESD immunity (>16 kV HBM) and supports non-repetitive surge currents up to 865 A under standardized 8.3 ms square-wave conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	5.6 V nominal (min 5.32 V, max 5.88 V); defines precise clamping threshold for 5 V rail stabilization
Power Dissipation (P_D)	5 W at T_L = 25 °C; sets maximum continuous power handling without forced cooling
Zener Impedance (Z_ZT)	220 Ω at I_ZT = 1 mA; determines regulation stiffness and output voltage variation under load changes
Leakage Current (I_R)	0.25 mA at V_R = 13.4 V; ensures minimal standby current in high-impedance bias networks
Max DC Zener Current (I_ZM)	865 mA; derived from P_D/V_Z(min), limits safe continuous conduction without thermal runaway
Surge Current (I_RM)	865 A peak at 8.3 ms; enables transient overvoltage suppression in unprotected input stages
ESD Rating	Class 3 (>16 kV HBM); provides robustness against human-handling electrostatic discharge during assembly

Pinout & Package

Package: Axial-lead, transfer-molded thermosetting plastic (CASE 017AA), cathode indicated by band. Dimensions: body length 8.38–8.89 mm, diameter 3.30–3.68 mm, lead diameter ≤1.27 mm, overall length 25.40–31.75 mm.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward conduction terminal / Zener cathode reference node	Connected to lower-potential side of regulated circuit; forms reference ground return path
Cathode	Zener breakdown terminal / Regulation output node	Connected to higher-potential rail; supplies stable 5.6 V reference when reverse-biased above V_Z

Key Features

Feature	Design Value
±5% Zener voltage tolerance	Guarantees tight regulation window (5.32–5.88 V) without post-manufacturing trimming
Silicon-oxide passivated junction	Enables low leakage (<0.25 mA), stable long-term V_Z drift, and reliable operation in humid environments
25 °C/W junction-to-lead thermal resistance	Supports natural convection cooling with standard 3/8″ lead length; avoids need for heatsinking in 5 W operation
Pb-free plastic package (RoHS compliant)	Meets global environmental directives; compatible with standard SnPb and lead-free soldering profiles up to 260 °C

Applications

5 V Power Rail Clamping	Microcontroller Reset Circuit
Use Scenario: Protecting 5 V logic supply from transient spikes caused by relay switching or ESD events. IC Role / Device Role / Timing Role: Shunt regulator that conducts excess current when voltage exceeds 5.6 V, clamping rail to safe level. Use Value: Prevents latch-up or damage to downstream 5 V ICs by limiting overvoltage to <6 V for durations up to 8.3 ms.	Use Scenario: Generating a clean, temperature-stable reset signal for an MCU during power-up or brownout. IC Role / Device Role / Timing Role: Zener-based voltage monitor feeding RC network to reset controller or supervisor IC. Use Value: Ensures reset assertion until V_CC reaches ≥4.75 V, leveraging 5.6 V reference and low-temperature-coefficient behavior.
Reference Voltage Source	Overvoltage Protection Trigger
Use Scenario: Providing stable 5.6 V reference for ADC voltage dividers or analog comparators in sensor interfaces. IC Role / Device Role / Timing Role: Precision voltage node referenced by op-amp or comparator to detect threshold crossings. Use Value: Delivers <0.5% initial error and <10 mV/°C tempco, enabling accurate 12-bit measurement systems without calibration.	Use Scenario: Activating crowbar circuit or shutdown logic when input voltage exceeds safe limit in industrial power modules. IC Role / Device Role / Timing Role: Zener-triggered SCR gate driver or optocoupler input stage. Use Value: Responds within microseconds to overvoltage events >5.88 V, initiating fast fault isolation before downstream damage occurs.

5 V Power Rail Clamping

Microcontroller Reset Circuit

Use Scenario: Protecting 5 V logic supply from transient spikes caused by relay switching or ESD events.

IC Role / Device Role / Timing Role: Shunt regulator that conducts excess current when voltage exceeds 5.6 V, clamping rail to safe level.

Use Value: Prevents latch-up or damage to downstream 5 V ICs by limiting overvoltage to <6 V for durations up to 8.3 ms.

Use Scenario: Generating a clean, temperature-stable reset signal for an MCU during power-up or brownout.

IC Role / Device Role / Timing Role: Zener-based voltage monitor feeding RC network to reset controller or supervisor IC.

Use Value: Ensures reset assertion until V_CC reaches ≥4.75 V, leveraging 5.6 V reference and low-temperature-coefficient behavior.

Reference Voltage Source

Overvoltage Protection Trigger

Use Scenario: Providing stable 5.6 V reference for ADC voltage dividers or analog comparators in sensor interfaces.

IC Role / Device Role / Timing Role: Precision voltage node referenced by op-amp or comparator to detect threshold crossings.

Use Value: Delivers <0.5% initial error and <10 mV/°C tempco, enabling accurate 12-bit measurement systems without calibration.

Use Scenario: Activating crowbar circuit or shutdown logic when input voltage exceeds safe limit in industrial power modules.

IC Role / Device Role / Timing Role: Zener-triggered SCR gate driver or optocoupler input stage.

Use Value: Responds within microseconds to overvoltage events >5.88 V, initiating fast fault isolation before downstream damage occurs.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
1N5338B	Nominal V_Z = 5.1 V (min 4.85 V, max 5.36 V); Z_ZT = 240 Ω at 1.5 mA	Suitable where 5.1 V regulation is required; slightly higher impedance reduces regulation accuracy at light loads	Select when tighter 5.1 V tolerance is needed and 500 mV lower clamping threshold is acceptable
1N5340B	Nominal V_Z = 6.0 V (min 5.70 V, max 6.30 V); Z_ZT = 200 Ω at 1 mA	Better regulation stiffness but higher clamping voltage; leakage current 0.19 mA at 12.7 V	Choose for 6 V rail protection where lower leakage and improved impedance justify 400 mV higher trip point

Compared with 1N5339B, the 1N5338B offers lower nominal voltage but higher impedance, while the 1N5340B provides superior regulation performance at the cost of elevated clamping level - selection depends on whether system margin favors lower trip voltage or tighter regulation.

Availability

1N5339B is available at Aetrix Electronics and suitable for 5 V power rail clamping, microcontroller reset generation, and analog reference voltage sourcing requiring stable component supply across industrial control, automotive subsystems, and embedded instrumentation designs.

Supply support for 1N5339B 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

onsemi (Semiconductor Components Industries, LLC) is a global semiconductor supplier focused on energy-efficient innovation for automotive, industrial, cloud, and IoT applications.

The 1N53 Series belongs to onsemi's Surmetic™ 40 Zener regulator family, engineered for high-reliability voltage reference and shunt regulation in harsh environments with extended temperature operation and robust surge immunity.

FAQ

What is the nominal zener voltage and tolerance of the 1N5339B?

The 1N5339B has a nominal zener voltage of 5.6 V with a guaranteed tolerance of ±5%, corresponding to a minimum value of 5.32 V and maximum of 5.88 V at I_ZT = 1 mA and T_A = 25 °C. This tight tolerance eliminates need for external trimming in most 5 V regulation applications and ensures predictable clamping behavior across production lots.

How does the 1N5339B handle transient overvoltage events?

The 1N5339B supports a peak non-repetitive surge current of 865 A at 8.3 ms pulse width, enabling it to absorb high-energy transients such as inductive kickback or ESD events without failure. Its 5 W steady-state power rating and 25 °C/W thermal resistance allow safe dissipation of short-duration surges when mounted with standard 3/8″ lead length.

What is the maximum DC zener current rating for the 1N5339B?

The maximum DC zener current (I_ZM) for the 1N5339B is 865 mA, calculated as P_D / V_Z(min) = 5 W / 5.32 V. This value represents the highest continuous reverse current the device can sustain without exceeding its thermal limits or degrading long-term reliability under typical ambient conditions.

Is the 1N5339B RoHS compliant and compatible with lead-free soldering?

Yes, the 1N5339B is offered in a Pb-free plastic package (denoted by "G" suffix) and is fully RoHS compliant. It supports lead-free reflow and hand-soldering processes with maximum lead temperature of 260 °C for 10 seconds at 1/16 inch from case, meeting IPC-J-STD-020 and JEDEC J-STD-002 requirements for modern assembly lines.

What is the zener impedance of the 1N5339B and why does it matter?

The 1N5339B exhibits a maximum zener impedance (Z_ZT) of 220 Ω at I_ZT = 1 mA. This parameter quantifies how tightly the device maintains its rated voltage under varying load currents - lower impedance yields smaller output voltage deviations during current changes, critical for precision reference and low-noise regulation applications.

1N5339B Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: T-18, Axial

Packaging:: Bulk

Product Status:: Obsolete

Voltage - Zener (Nom) (Vz):: 5.6 V

Tolerance:: ±5%

Power - Max:: 5 W

Impedance (Max) (Zzt):: 1 Ohms

Current - Reverse Leakage @ Vr:: 1 µA @ 2 V

Voltage - Forward (Vf) (Max) @ If:: 1.2 V @ 1 A

Operating Temperature:: -65°C ~ 200°C

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: Axial

1N5339B FAQ

1.How can I place an order for 1N5339B through Aetrix?

Please submit a Request for Quotation (RFQ) for 1N5339B 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 1N5339B reliable?

The price and inventory of 1N5339B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5339B is usually 5 days.

3.What payment methods are accepted for 1N5339B?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5339B transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 1N5339B?

1N5339B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 1N5339B 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 1N5339B?

For technical support, including 1N5339B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5339B requirements.

6.How does Aetrix verify that 1N5339B is sourced from the original manufacturer or authorized distributors?

All 1N5339B 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 1N5339B meets industry standards.

7.What is the process for return or replacement of 1N5339B?

All 1N5339B units undergo pre-shipment inspection (PSI). If there is an issue with 1N5339B, 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 1N5339B part is unused and in its original packaging.

Return procedure for 1N5339B:

1.Submit a request within 90 days.

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

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