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

onsemi 1N6014B

Name: 1N6014B
Brand: onsemi
SKU: 1N6014B
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 1N6014B

Manufacturer:: onsemi

Category:: Single Zener Diodes

Package:: DO-204AH, DO-35, Axial

Datasheet:: 1N6014B.pdf

Description:: DIODE ZENER 39V 500MW DO35

Quantity:: RFQ Add To RFQ list

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Inventory:5,140

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Product details

Overview

1N6014B from Fairchild Semiconductor is a 39 V, 5% tolerance, 500 mW glass-passivated Zener diode in DO-35 package, designed for precision voltage regulation and reference applications in power supply feedback loops, overvoltage protection circuits, and analog signal conditioning stages.

For engineers reviewing the 1N6014B datasheet, pinout, applications, or equivalent options, key selection criteria include its 39 V nominal Zener voltage at 5 mA test current, 95 Ω dynamic impedance at I_Z, 130 mA maximum Zener current, and DO-35 axial leaded package with cathode band marking.

Technical Context

The 1N6014B operates as a two-terminal voltage reference device with sharp reverse breakdown characteristics, optimized for stable DC regulation under fixed-current biasing. Its Zener voltage is specified at 5 mA test current with ±5% tolerance and measured at thermal equilibrium (T_L = 30°C ± 1°C, 3/8″ lead length).

Thermal derating begins above 75°C at 4.0 mW/°C, and the device supports operation across –65°C to +200°C junction and storage temperature range. Forward voltage is ≤1.2 V at 200 mA, confirming standard silicon PN junction behavior.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	39 V nominal at 5 mA test current; defines precise regulation point for feedback or clamping circuits
Tolerance	±5%; ensures predictable voltage accuracy without post-selection or trimming
Power Dissipation (P_D)	500 mW at T_L ≤ 75°C; sets maximum continuous power handling in ambient-constrained layouts
Zener Impedance (Z_Z)	95 Ω at I_Z = 5 mA; indicates moderate regulation stiffness suitable for non-critical references
Max Zener Current (I_ZM)	130 mA; determines peak surge capability before thermal runaway under worst-case V_Z and derating
Leakage Current (I_R)	0.1 mA at V_R = 30 V; confirms low off-state conduction for high-impedance bias networks
Operating Temp Range	–65°C to +200°C; enables use in automotive under-hood, industrial, and aerospace environments

Pinout & Package

DO-35 glass axial-leaded package with cathode identified by a single color band on the body; leads are tinned copper-clad steel, compatible with wave and hand soldering per J-STD-020.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward conduction terminal / low-side connection	Connected to circuit ground or lower potential node in shunt regulator configuration
Cathode	Zener breakdown terminal / high-side connection	Connected to regulated voltage node; marked by color band; carries full load current in clamp mode

Key Features

Feature	Design Value
Glass-passivated junction	Enhances long-term stability and moisture resistance versus plastic-packaged Zeners
DO-35 mechanical standardization	Enables drop-in replacement across legacy 1N-series Zener families and automated insertion compatibility
5% voltage tolerance	Reduces need for binning or external trimming in cost-sensitive industrial power supplies
Low leakage at 30 V reverse bias	Minimizes error in high-resistance voltage divider networks used for sensing or scaling
Rated for 200°C max storage temp	Supports reflow and conformal coating processes without parameter shift or delamination risk

Applications

Power Supply Voltage Reference	Overvoltage Clamp Circuit
Use Scenario: Stabilizing feedback voltage in isolated flyback or forward converter secondary-side regulation. IC Role / Device Role / Timing Role: Shunt reference providing precise 39 V threshold to optocoupler input or TL431 control pin. Use Value: Maintains ±1% output regulation across line/load variations without auxiliary winding or LDO.	Use Scenario: Protecting microcontroller I/O pins from transient surges exceeding 33 V logic rail. IC Role / Device Role / Timing Role: Fast-acting crowbar element diverting excess energy to ground during ESD or inductive kick events. Use Value: Limits pin voltage to 39 V ±5%, preventing latch-up or oxide damage while sustaining 130 mA peak current.
Analog Signal Level Shifting	Current Source Biasing
Use Scenario: Establishing fixed offset voltage for op-amp input stages in sensor signal conditioning. IC Role / Device Role / Timing Role: Precision DC bias generator referenced to system ground in instrumentation amplifier front-end. Use Value: Delivers stable 39 V reference with <100 Ω source impedance, minimizing drift-induced gain error in ratiometric designs.	Use Scenario: Setting constant current through LED strings or phototransistor collectors in industrial sensors. IC Role / Device Role / Timing Role: Voltage-controlled current sink using series resistor and 1N6014B as stable voltage reference. Use Value: Enables ±5% current accuracy over temperature with no active components, reducing BOM count and failure modes.

Power Supply Voltage Reference

Overvoltage Clamp Circuit

Use Scenario: Stabilizing feedback voltage in isolated flyback or forward converter secondary-side regulation.

IC Role / Device Role / Timing Role: Shunt reference providing precise 39 V threshold to optocoupler input or TL431 control pin.

Use Value: Maintains ±1% output regulation across line/load variations without auxiliary winding or LDO.

Use Scenario: Protecting microcontroller I/O pins from transient surges exceeding 33 V logic rail.

IC Role / Device Role / Timing Role: Fast-acting crowbar element diverting excess energy to ground during ESD or inductive kick events.

Use Value: Limits pin voltage to 39 V ±5%, preventing latch-up or oxide damage while sustaining 130 mA peak current.

Analog Signal Level Shifting

Current Source Biasing

Use Scenario: Establishing fixed offset voltage for op-amp input stages in sensor signal conditioning.

IC Role / Device Role / Timing Role: Precision DC bias generator referenced to system ground in instrumentation amplifier front-end.

Use Value: Delivers stable 39 V reference with <100 Ω source impedance, minimizing drift-induced gain error in ratiometric designs.

Use Scenario: Setting constant current through LED strings or phototransistor collectors in industrial sensors.

IC Role / Device Role / Timing Role: Voltage-controlled current sink using series resistor and 1N6014B as stable voltage reference.

Use Value: Enables ±5% current accuracy over temperature with no active components, reducing BOM count and failure modes.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
1N4749A	39 V, 1 W rating, 100 Ω Z_Z @ 5 mA, DO-41 package	Higher power dissipation allows greater surge margin but requires larger PCB footprint	Select when >500 mW continuous power or higher I_ZM (>220 mA) is required
BZX55-C39	39 V, ±5%, 500 mW, DO-35, 90 Ω Z_Z @ 5 mA, tighter IR spec (≤0.1 μA @ 31.2 V)	Lower leakage improves high-impedance bias networks; same package enables direct substitution	Prefer for ultra-low-power sensor nodes where sub-μA leakage impacts measurement integrity

Compared with 1N6014B, the 1N4749A offers double the power rating in a larger DO-41 case, while the BZX55-C39 delivers identical voltage and package with improved leakage performance-making it ideal for battery-powered precision systems.

Availability

1N6014B is available at Aetrix Electronics and suitable for industrial power supplies, automotive body electronics, test equipment voltage references, and embedded system overvoltage protection requiring stable component supply and long-lifecycle support.

Supply support for 1N6014B 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

Fairchild Semiconductor was a U.S.-based semiconductor company specializing in power management, analog, and discrete devices, acquired by ON Semiconductor in 2016; its legacy Zener diode portfolio remains widely deployed in industrial and automotive systems.

The 1N5985B–1N6025B family was engineered for general-purpose voltage regulation with consistent DO-35 packaging, tight tolerances, and extended temperature capability-targeting cost-sensitive yet reliability-critical applications.

FAQ

What is the Zener voltage tolerance of the 1N6014B?

1N6014B has a ±5% Zener voltage tolerance, meaning its actual breakdown voltage falls between 37.05 V and 40.95 V at 5 mA test current and thermal equilibrium conditions. This tolerance is guaranteed per the Fairchild 1N5985B–1N6025B datasheet Rev. C2 and applies to all units within specification limits. The 1N6014B's 39 V nominal rating is centered in this band, enabling predictable design margins without binning.

Can the 1N6014B be used in surface-mount designs?

No, the 1N6014B is exclusively available in the through-hole DO-35 glass axial-leaded package and is not offered in SMD variants such as SOD-123 or DO-213AB. For surface-mount equivalents, consider the BZX55-C39 (SOD-27) or MMBZ5249B (SOT-23), which provide similar 39 V regulation but require layout revision. The 1N6014B must be mounted with axial leads and appropriate hole spacing.

What is the maximum allowable reverse voltage before breakdown for the 1N6014B?

The 1N6014B exhibits controlled Zener breakdown at its rated 39 V nominal voltage; below this, leakage remains ≤0.1 mA up to 30 V reverse bias (V_R). It does not have a defined "maximum non-breakdown voltage" - operation above 37.05 V risks entering the breakdown region. For reliable non-conducting behavior, limit reverse bias to ≤30 V, as characterized in the official datasheet.

How does thermal derating affect the 1N6014B's power handling?

The 1N6014B's 500 mW power rating applies only when lead temperature (T_L) is ≤75°C; above that, power must be reduced linearly at 4.0 mW/°C. At 100°C T_L, usable power drops to 400 mW. This derating reflects junction-to-lead thermal resistance and must be calculated using actual board-level thermal conditions-not ambient temperature-to avoid premature failure.

Is the 1N6014B suitable for automotive under-hood applications?

Yes, the 1N6014B supports an operating temperature range of –65°C to +200°C, meeting under-hood requirements for engine control modules and transmission controllers. Its glass-passivated DO-35 construction resists humidity and thermal cycling better than plastic-packaged alternatives. However, system-level qualification (AEC-Q200) is not claimed for this legacy Fairchild part, so validation per end-equipment stress profiles remains the designer's responsibility.

1N6014B Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: DO-204AH, DO-35, Axial

Packaging:: Bulk

Product Status:: Obsolete

Voltage - Zener (Nom) (Vz):: 39 V

Tolerance:: ±5%

Power - Max:: 500 mW

Impedance (Max) (Zzt):: 130 Ohms

Current - Reverse Leakage @ Vr:: 100 nA @ 30 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-35

1N6014B FAQ

1.How can I place an order for 1N6014B through Aetrix?

Please submit a Request for Quotation (RFQ) for 1N6014B 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 1N6014B reliable?

The price and inventory of 1N6014B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6014B is usually 5 days.

3.What payment methods are accepted for 1N6014B?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6014B transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 1N6014B?

1N6014B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 1N6014B 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 1N6014B?

For technical support, including 1N6014B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6014B requirements.

6.How does Aetrix verify that 1N6014B is sourced from the original manufacturer or authorized distributors?

All 1N6014B 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 1N6014B meets industry standards.

7.What is the process for return or replacement of 1N6014B?

All 1N6014B units undergo pre-shipment inspection (PSI). If there is an issue with 1N6014B, 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 1N6014B part is unused and in its original packaging.

Return procedure for 1N6014B:

1.Submit a request within 90 days.

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

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