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

Nexperia USA Inc. BZX79-B36,143

Name: BZX79-B36,143
Brand: Nexperia USA Inc.
SKU: BZX79-B36,143
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BZX79-B36,143

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

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

Datasheet:: BZX79-B36,143.pdf

Description:: DIODE ZENER 36V 400MW ALF2

Quantity:: RFQ Add To RFQ list

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Inventory:4,990

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Product details

Overview

BZX79-B36,143 from Nexperia is a ±2% tolerance Zener voltage regulator diode with nominal 36 V breakdown voltage at 2 mA test current, 80 Ω typical differential resistance, and −26.0 mV/K temperature coefficient at 2 mA. It operates as a low-power precision voltage reference in biasing, feedback, and stabilization circuits, supporting stable regulation in power supply feedback loops and sensor excitation networks.

For engineers reviewing the BZX79-B36,143 datasheet, BZX79-B36,143 pinout, BZX79-B36,143 application, or BZX79-B36,143 equivalent, this device is selected for its tight 2% tolerance, predictable thermal drift, low 45 nA reverse leakage at 25.2 V, and DO-35 package compatibility with through-hole PCB layouts requiring minimal board space and thermal mass.

Technical Context

This Zener diode functions in reverse-biased avalanche mode to maintain a stable reference voltage across its terminals under varying load and temperature conditions. Its 36 V nominal Zener voltage is specified at I_Ztest = 2 mA, with differential resistance of 80 Ω (typ) ensuring low dynamic impedance for effective ripple suppression.

The device exhibits a negative temperature coefficient of −26.0 mV/K at 2 mA, enabling predictable voltage drift over temperature-critical for analog signal conditioning and calibration-critical references. It is rated for 500 mW total power dissipation at T_amb = 50 °C with lead length ≤8 mm and tie-point temperature ≤50 °C.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	35.3–36.7 V at I_Z = 2 mA; ensures precise 36 V regulation within ±2% tolerance for feedback node stability
Differential Resistance (r_dif)	80 Ω (typ), ≤350 Ω (max); maintains low output impedance to suppress AC ripple in reference paths
Temperature Coefficient (S_Z)	−26.0 mV/K at I_Z = 2 mA; enables predictable, linear voltage drift for compensated designs
Reverse Leakage (I_R)	45 nA max at V_R = 25.2 V (0.7 × V_Znom); minimizes error current in high-impedance reference nodes
Total Power Dissipation (P_tot)	500 mW at T_amb = 50 °C; supports continuous operation in compact, non-heatsinked PCB layouts
Package	SOD27 (DO-35); hermetically sealed glass axial package with cathode band marking, compatible with wave soldering
Non-repetitive Peak Power (P_ZSM)	40 W at t_p = 100 μs; provides surge immunity against transient overvoltage events

Pinout & Package

SOD27 (DO-35) is a hermetically sealed glass axial-leaded package with cathode identified by a colored band. Leads are tinned copper-clad steel, suitable for manual and automated through-hole assembly.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward conduction terminal / low-voltage side in Zener mode	Connected to circuit ground or lower potential node; carries forward current up to 250 mA
Cathode	Zener breakdown terminal / regulated voltage output node	Marked with band; delivers stable 36 V reference when reverse biased; connects to feedback or bias network

Key Features

Feature	Design Value
±2% Zener voltage tolerance	Enables direct replacement in precision reference designs without recalibration or resistor trimming
Low 45 nA reverse leakage at 0.7×V_Z	Reduces loading error in high-impedance op-amp reference inputs and ADC voltage dividers
Hermetic glass SOD27 package	Ensures long-term parameter stability and moisture resistance in industrial environments
40 W non-repetitive peak power rating	Withstands ESD and line transients without degradation in power supply protection circuits
−26.0 mV/K temperature coefficient	Allows accurate modeling and compensation in temperature-sensitive instrumentation front-ends

Applications

Power Supply Feedback Reference

Sensor Excitation Biasing

Use Scenario: Stabilizing output voltage in isolated flyback or buck-derived DC-DC converters via optocoupler feedback loop.

IC Role / Device Role / Timing Role: Zener diode provides precise 36 V reference to TL431 shunt regulator input or directly biases optocoupler LED anode.

Use Value: Tight ±2% tolerance ensures consistent regulation setpoint across production units; low r_dif minimizes load-induced output deviation.

Use Scenario: Supplying stable excitation voltage to resistive bridge sensors (e.g., strain gauges, RTDs) in data acquisition modules.

IC Role / Device Role / Timing Role: Functions as low-noise, low-drift voltage reference source for Wheatstone bridge top rail.

Use Value: Predictable −26.0 mV/K drift allows software compensation; 45 nA leakage avoids measurement offset in microamp-level bridge currents.

Overvoltage Clamp Protection

ADC Input Voltage Scaling

Use Scenario: Clamping transient surges on 24 V industrial control lines to protect downstream logic and analog inputs.

IC Role / Device Role / Timing Role: Reverse-biased Zener absorbs energy during overvoltage events, limiting voltage to 36 V.

Use Value: 40 W peak power rating handles 100 μs surges per IEC 61000-4-4; glass package ensures reliability under repeated stress.

Use Scenario: Scaling 0–48 V field signals to 0–3.3 V range for microcontroller ADC input using resistive divider with reference node.

IC Role / Device Role / Timing Role: Provides stable 36 V reference point for ratio-metric divider design, improving accuracy vs. supply variation.

Use Value: Low 80 Ω r_dif prevents divider ratio shift under varying load; hermetic seal prevents long-term drift in humid environments.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
1N4738A	33 V nominal, ±5% tolerance, 35 Ω r_dif, DO-41 package	Larger voltage deviation and looser tolerance; higher thermal resistance due to larger DO-41 body	Select only if 33 V suffices and cost sensitivity outweighs precision requirements
BZX84-C36	36 V nominal, ±5% tolerance, SOT-23 surface-mount package, 90 Ω r_dif	Not pin-compatible; lacks hermetic seal; unsuitable for high-reliability or humid environments	Choose only for space-constrained PCBs where reflow compatibility and footprint reduction are critical

Compared with 1N4738A and BZX84-C36, BZX79-B36,143 offers superior voltage accuracy (±2% vs. ±5%), hermetic reliability, and proven thermal performance in through-hole industrial assemblies-making it optimal for precision-stable reference roles where long-term drift and environmental resilience matter.

Availability

BZX79-B36,143 is available at Aetrix Electronics and suitable for industrial power supplies, sensor interface modules, overvoltage protection circuits, and precision analog reference designs requiring stable component supply and long-lifecycle support.

Supply support for BZX79-B36,143 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 leader in discrete semiconductors, formed in 2017 from the former NXP Standard Products division, with manufacturing and R&D focused on automotive, industrial, and computing applications.

BZX79-B36,143 belongs to the BZX79 series of low-power Zener diodes designed specifically for precision voltage regulation and referencing in cost-sensitive, high-reliability through-hole applications.

FAQ

What is the maximum continuous power dissipation for BZX79-B36,143?

The BZX79-B36,143 is rated for 500 mW total power dissipation at ambient temperature ≤50 °C with lead length ≤8 mm and tie-point temperature ≤50 °C. Derating is required above 50 °C ambient per the 380 K/W junction-to-ambient thermal resistance.

How does the temperature coefficient affect regulation accuracy over temperature?

With a typical temperature coefficient of −26.0 mV/K at 2 mA, the Zener voltage decreases by approximately 26 mV per Kelvin rise in junction temperature. At 100 °C junction temperature (ΔT = 75 K), the expected drop is ~1.95 V-enabling accurate system-level compensation in calibrated instruments.

Is BZX79-B36,143 suitable for use in high-humidity environments?

Yes-the SOD27 (DO-35) package is hermetically sealed glass, providing full moisture barrier protection. This eliminates parameter drift due to humidity ingress and supports reliable operation in industrial enclosures and outdoor sensor housings per IEC 60068-2-30 testing standards.

Can BZX79-B36,143 replace BZX79-C36 in existing designs?

No-BZX79-C36 has ±5% tolerance (34.2–37.8 V), while BZX79-B36,143 is ±2% (35.3–36.7 V). Substituting introduces tighter regulation but may require verification of circuit margin, especially in clamping applications where upper voltage limit must remain within safe limits.

BZX79-B36,143 Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: -

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

Packaging:: Cut Tape (CT)

Product Status:: Active

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

Tolerance:: ±2%

Power - Max:: 400 mW

Impedance (Max) (Zzt):: 90 Ohms

Current - Reverse Leakage @ Vr:: 50 nA @ 25.2 V

Voltage - Forward (Vf) (Max) @ If:: 900 mV @ 10 mA

Operating Temperature:: -65°C ~ 200°C

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: ALF2

BZX79-B36,143 FAQ

1.How can I place an order for BZX79-B36,143 through Aetrix?

Please submit a Request for Quotation (RFQ) for BZX79-B36,143 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 BZX79-B36,143 reliable?

The price and inventory of BZX79-B36,143 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX79-B36,143 is usually 5 days.

3.What payment methods are accepted for BZX79-B36,143?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX79-B36,143 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZX79-B36,143?

BZX79-B36,143 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZX79-B36,143 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 BZX79-B36,143?

For technical support, including BZX79-B36,143 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX79-B36,143 requirements.

6.How does Aetrix verify that BZX79-B36,143 is sourced from the original manufacturer or authorized distributors?

All BZX79-B36,143 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 BZX79-B36,143 meets industry standards.

7.What is the process for return or replacement of BZX79-B36,143?

All BZX79-B36,143 units undergo pre-shipment inspection (PSI). If there is an issue with BZX79-B36,143, 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 BZX79-B36,143 part is unused and in its original packaging.

Return procedure for BZX79-B36,143:

1.Submit a request within 90 days.

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

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