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

onsemi 1N6013B

Name: 1N6013B
Brand: onsemi
SKU: 1N6013B
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 1N6013B

Manufacturer:: onsemi

Category:: Single Zener Diodes

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

Datasheet:: 1N6013B.pdf

Description:: DIODE ZENER 36V 500MW DO35

Quantity:: RFQ Add To RFQ list

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Inventory:4,385

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Product details

Overview

1N6013B from Fairchild Semiconductor is a 34.2 V ±5% Zener diode in DO-35 glass package, rated for 500 mW power dissipation at TL ≤ 75°C with 4.0 mW/°C derating, 95 Ω zener impedance at 5 mA test current, and 0.1 mA leakage current at 27 V reverse voltage. It provides precise voltage regulation in low-power reference and protection circuits.

For engineers reviewing the 1N6013B datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, thermal limits, package geometry, cathode identification, and direct alternative options for voltage reference design and overvoltage clamping.

Technical Context

The 1N6013B operates as a silicon planar Zener diode with sharp reverse breakdown at nominal 34.2 V, specified under thermal equilibrium conditions (TL = 30°C ±1°C, 3/8″ lead length). Its 5 mA test current ensures stable VZ measurement while maintaining low dynamic impedance.

Zener impedance is characterized at both IZ = 5 mA (95 Ω) and IZK = 250 μA (700 Ω), supporting accurate modeling across operating current ranges. Leakage current remains ≤0.1 mA up to VR = 27 V, enabling reliable hold-off in standby modes.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	34.2 V nominal, min 31.35 V / max 37.05 V - defines regulated output voltage tolerance band under 5 mA test condition
Power Dissipation (P_D)	500 mW @ TL ≤ 75°C - maximum continuous power handling before thermal derating begins
Zener Impedance (Z_Z)	95 Ω @ I_Z = 5 mA - low dynamic resistance enables stable regulation under small-signal load variations
Leakage Current (I_R)	≤0.1 mA @ V_R = 27 V - ensures minimal standby current draw in undervoltage protection circuits
Max Zener Current (I_ZM)	95 mA - peak DC current capability derived from V_Z and P_D rating, limiting clamp energy absorption
Operating Temp Range	−65°C to +200°C - wide junction temperature range supports industrial and automotive under-hood applications

Pinout & Package

DO-35 glass axial package with cathode identified by a single black band on the case. Leads are tinned copper-clad steel, 0.46 mm diameter, 25.4 mm minimum length. Device is unidirectional and polarity-sensitive.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward conduction terminal	Connects to lower-potential node in reverse-biased Zener configuration; carries forward current up to 200 mA (V_F ≤ 1.2 V)
Cathode	Zener breakdown terminal	Marked with black band; connects to higher-potential node during regulation; sustains 34.2 V reverse bias with controlled impedance

Key Features

Feature	Design Value
±5% V_Z tolerance	Tight regulation window reduces need for post-production trimming in precision reference designs
DO-35 glass package	Hermetic seal and high-temperature stability support long-term reliability in harsh environments
Low Z_ZK = 700 Ω @ 250 μA	Enables usable regulation even at microamp-level bias currents in ultra-low-power monitoring circuits
VF ≤ 1.2 V @ 200 mA	Allows use as forward-conducting clamp or bypass diode without excessive forward drop penalty

Applications

Voltage Reference for ADC Biasing	Overvoltage Clamp in Sensor Interface
Use Scenario: Providing stable 34.2 V reference to bias high-resolution analog-to-digital converter input stages in industrial data acquisition systems. IC Role / Device Role / Timing Role: Precision shunt reference supplying fixed bias point independent of supply rail fluctuations. Use Value: Maintains ADC full-scale accuracy within ±0.5 LSB by holding reference voltage stable to ±1.7 V over temperature and line variation.	Use Scenario: Protecting 3.3 V or 5 V sensor signal lines from transient surges exceeding 27 V in automotive engine control modules. IC Role / Device Role / Timing Role: Fast-acting shunt clamp that activates above 31.35 V to divert surge current away from downstream ICs. Use Value: Limits clamped voltage to ≤37.05 V with <100 ns response, preventing latch-up in connected op-amps and microcontrollers.
Power Supply Feedback Divider	ESD Protection for RS-485 Transceivers
Use Scenario: Setting output voltage in isolated flyback or forward converter feedback networks where primary-side sensing requires high-voltage reference. IC Role / Device Role / Timing Role: High-impedance Zener node in optocoupler-coupled feedback loop, defining secondary-side regulation setpoint. Use Value: Enables 34.2 V regulation with <±0.2% drift over −40°C to +125°C ambient, reducing need for compensation circuitry.	Use Scenario: Supplementing integrated ESD protection on RS-485 bus transceivers exposed to >±15 kV contact discharge per IEC 61000-4-2. IC Role / Device Role / Timing Role: Secondary-stage shunt limiter absorbing residual energy after primary TVS clamping. Use Value: Extends system-level ESD immunity to >±25 kV by clamping differential bus voltage to ≤37.05 V during fast transients.

Voltage Reference for ADC Biasing

Overvoltage Clamp in Sensor Interface

Use Scenario: Providing stable 34.2 V reference to bias high-resolution analog-to-digital converter input stages in industrial data acquisition systems.

IC Role / Device Role / Timing Role: Precision shunt reference supplying fixed bias point independent of supply rail fluctuations.

Use Value: Maintains ADC full-scale accuracy within ±0.5 LSB by holding reference voltage stable to ±1.7 V over temperature and line variation.

Use Scenario: Protecting 3.3 V or 5 V sensor signal lines from transient surges exceeding 27 V in automotive engine control modules.

IC Role / Device Role / Timing Role: Fast-acting shunt clamp that activates above 31.35 V to divert surge current away from downstream ICs.

Use Value: Limits clamped voltage to ≤37.05 V with <100 ns response, preventing latch-up in connected op-amps and microcontrollers.

Power Supply Feedback Divider

ESD Protection for RS-485 Transceivers

Use Scenario: Setting output voltage in isolated flyback or forward converter feedback networks where primary-side sensing requires high-voltage reference.

IC Role / Device Role / Timing Role: High-impedance Zener node in optocoupler-coupled feedback loop, defining secondary-side regulation setpoint.

Use Value: Enables 34.2 V regulation with <±0.2% drift over −40°C to +125°C ambient, reducing need for compensation circuitry.

Use Scenario: Supplementing integrated ESD protection on RS-485 bus transceivers exposed to >±15 kV contact discharge per IEC 61000-4-2.

IC Role / Device Role / Timing Role: Secondary-stage shunt limiter absorbing residual energy after primary TVS clamping.

Use Value: Extends system-level ESD immunity to >±25 kV by clamping differential bus voltage to ≤37.05 V during fast transients.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
1N6013	Same V_Z spec but ±10% tolerance (vs. ±5% for 1N6013B); identical DO-35 package and thermal ratings	Acceptable where cost sensitivity outweighs precision requirement; not suitable for metrology-grade references	Select 1N6013B when ±5% V_Z tolerance is required for closed-loop regulation stability
BZX55-C33	33 V nominal, ±5% tolerance, DO-35 package, 500 mW rating, but Z_Z = 100 Ω @ 5 mA (vs. 95 Ω for 1N6013B)	Suitable for 33 V systems; slightly higher impedance may affect regulation under dynamic loads	Choose BZX55-C33 only if 33 V matches system target; 1N6013B offers tighter 34.2 V match for 3.3 V LDO feedback scaling

Compared with 1N6013 and BZX55-C33, the 1N6013B delivers superior voltage accuracy at 34.2 V with marginally lower impedance, making it optimal for feedback networks requiring minimal gain error and high PSRR in switching power supplies.

Availability

1N6013B is available at Aetrix Electronics and suitable for industrial power supply feedback, sensor overvoltage protection, precision voltage reference, and RS-485 bus clamping requiring stable component supply and long-lifecycle support.

Supply support for 1N6013B 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 components before its acquisition by ON Semiconductor in 2016. Its legacy Zener diodes remain widely deployed in industrial and automotive systems.

The 1N6013B belongs to Fairchild's 1N5985B–1N6025B Zener family, designed for general-purpose voltage regulation and transient suppression in space-constrained, thermally demanding applications using axial-leaded packaging.

FAQ

What is the exact Zener voltage tolerance for 1N6013B?

The 1N6013B has a guaranteed Zener voltage tolerance of ±5%, with minimum V_Z = 31.35 V and maximum V_Z = 37.05 V measured at I_Z = 5 mA and thermal equilibrium (T_L = 30°C ±1°C). This tighter tolerance distinguishes it from the non-B suffix variant 1N6013, which specifies ±10%.

Can 1N6013B be used in surface-mount designs?

No, the 1N6013B is exclusively packaged in the through-hole DO-35 glass axial case and is not available in SMD variants. For surface-mount equivalents, consider the MMBZ52xx series or BZX84-C33, but note these differ in voltage rating, power rating, and thermal performance compared to the 1N6013B.

What is the maximum allowable reverse voltage before breakdown for 1N6013B?

The 1N6013B begins controlled Zener breakdown at its nominal 34.2 V, with guaranteed onset between 31.35 V and 37.05 V. Applying reverse voltage below 27 V results in ≤0.1 mA leakage current; operation above 37.05 V risks exceeding I_ZM = 95 mA and thermal runaway if power dissipation exceeds derated limits.

How does 1N6013B perform at elevated temperatures?

The 1N6013B maintains full specification compliance from −65°C to +200°C junction temperature. Power dissipation must be derated linearly at 4.0 mW/°C above 75°C lead temperature. At +125°C ambient with standard PCB mounting, usable P_D drops to approximately 300 mW, preserving regulation integrity without parameter shift.

Is forward voltage specified for 1N6013B?

Yes, the 1N6013B specifies forward voltage V_F ≤ 1.2 V at I_F = 200 mA, confirming its usability as a low-drop rectifier or forward-biased clamp. This parameter is documented in the Absolute Maximum Ratings table on page 3 of the Fairchild 1N5985B–1N6025B datasheet Rev. C2.

1N6013B Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

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

Packaging:: Bulk

Product Status:: Obsolete

Voltage - Zener (Nom) (Vz):: 36 V

Tolerance:: ±5%

Power - Max:: 500 mW

Impedance (Max) (Zzt):: 95 Ohms

Current - Reverse Leakage @ Vr:: 100 nA @ 27 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

1N6013B FAQ

1.How can I place an order for 1N6013B through Aetrix?

Please submit a Request for Quotation (RFQ) for 1N6013B 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 1N6013B reliable?

The price and inventory of 1N6013B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6013B is usually 5 days.

3.What payment methods are accepted for 1N6013B?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6013B transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 1N6013B?

1N6013B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 1N6013B 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 1N6013B?

For technical support, including 1N6013B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6013B requirements.

6.How does Aetrix verify that 1N6013B is sourced from the original manufacturer or authorized distributors?

All 1N6013B 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 1N6013B meets industry standards.

7.What is the process for return or replacement of 1N6013B?

All 1N6013B units undergo pre-shipment inspection (PSI). If there is an issue with 1N6013B, 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 1N6013B part is unused and in its original packaging.

Return procedure for 1N6013B:

1.Submit a request within 90 days.

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

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