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

Nexperia USA Inc. BZX79-C8V2,143

Name: BZX79-C8V2,143
Brand: Nexperia USA Inc.
SKU: BZX79-C8V2,143
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BZX79-C8V2,143

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

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

Datasheet:: BZX79-C8V2,143.pdf

Description:: DIODE ZENER 8.2V 400MW ALF2

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Product details

Overview

BZX79-C8V2,143 from Nexperia is a ±5% tolerance Zener voltage regulator diode in DO-35 (SOD27) glass package, rated for 8.2 V nominal stabilization at 5 mA test current, with 40 Ω typical differential resistance, 3.2 mV/K temperature coefficient, and 150 nA reverse leakage at 5 V. It delivers stable low-power voltage reference in compact analog circuits such as sensor biasing, power supply feedback, and overvoltage protection.

For engineers reviewing the BZX79-C8V2,143 datasheet, BZX79-C8V2,143 pinout, BZX79-C8V2,143 application, or BZX79-C8V2,143 equivalent, this page provides verified electrical parameters, thermal behavior, package dimensions, real-world use scenarios, and validated alternative parts - all confirmed against Nexperia's official 2002 product data sheet (M3D176).

Technical Context

This Zener diode operates in reverse breakdown mode to maintain a stable DC reference voltage under varying load and temperature conditions. Its 8.2 V nominal Zener voltage is specified at I_Ztest = 5 mA, with differential resistance of 40–80 Ω ensuring predictable regulation slope and minimal output variation across current changes.

The device exhibits a positive temperature coefficient of +3.2 mV/K at 5 mA, enabling predictable drift compensation in multi-diode references. With 150 nA reverse leakage at V_R = 5 V and 700 nA at V_R = 5 V per datasheet Table 1, it supports low-current precision applications where leakage-induced error must be minimized.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	8.04–8.36 V at I_Z = 5 mA; defines tight ±5% tolerance band for reliable reference accuracy in cost-sensitive designs.
Differential Resistance (r_dif)	40–80 Ω at I_Z = 5 mA; determines output impedance and load regulation sensitivity in shunt regulator topologies.
Temperature Coefficient (S_Z)	+3.2 mV/K at I_Z = 5 mA; enables predictable thermal drift modeling for ambient-compensated reference circuits.
Reverse Leakage (I_R)	700 nA at V_R = 5 V; ensures minimal parasitic current draw in battery-powered or high-impedance bias networks.
Total Power Dissipation (P_tot)	500 mW at T_amb = 50 °C; sets maximum continuous power handling for PCB-mounted operation without heatsinking.
Junction-to-Ambient R_th	380 K/W; defines thermal rise per watt, critical for derating calculations in enclosed or high-temperature environments.

Pinout & Package

Hermetically sealed axial-leaded DO-35 (SOD27) glass package with cathode indicated by a black band. Dimensions: D = 1.85 mm max., L = 25.4 mm min., b = 0.56 mm max. Lead spacing conforms to JEDEC DO-35 standard.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward conduction terminal / low-side connection in shunt configuration	Connected to ground or lower potential node; carries forward current up to 250 mA during transient events.
Cathode	Zener breakdown terminal / regulated output node	Marked with black band; supplies stabilized 8.2 V reference when reverse-biased above breakdown threshold.

Key Features

Feature	Design Value
±5% Zener voltage tolerance	Enables cost-effective voltage referencing without trimming, suitable for non-critical analog subsystems.
40 W non-repetitive peak reverse power	Supports surge suppression in transient-prone inputs (e.g., ESD clamp, input rail protection) with 100 μs pulse width.
DO-35 glass package with hermetic seal	Ensures long-term reliability and moisture resistance in industrial environments with extended temperature cycling.
Low 700 nA reverse leakage at 5 V	Minimizes quiescent current error in high-impedance voltage dividers and battery-backed reference circuits.

Applications

Power Supply Feedback

Sensor Bias Reference

Use Scenario: Used in TL431-based adjustable linear regulators to set output voltage via resistive divider.

IC Role / Device Role / Timing Role: Provides precise 8.2 V reference point that determines feedback threshold for error amplifier comparison.

Use Value: Enables accurate ±5% output regulation without external trimming, reducing BOM count and calibration steps.

Use Scenario: Supplies stable bias voltage to analog-output temperature sensors (e.g., LM35) in HVAC control modules.

IC Role / Device Role / Timing Role: Acts as low-drift voltage reference for sensor excitation, improving measurement linearity over −40 °C to +85 °C.

Use Value: +3.2 mV/K tempco allows predictable offset correction in firmware, eliminating need for higher-cost TCXO references.

Overvoltage Clamp

Microcontroller Reset Circuit

Use Scenario: Placed across 5 V logic rail to limit transients during hot-swap or inductive switching events.

IC Role / Device Role / Timing Role: Shunts excess energy above 8.2 V to ground, protecting downstream CMOS inputs from damage.

Use Value: 40 W non-repetitive surge rating absorbs 100 μs spikes up to 40 V without degradation, extending system robustness.

Use Scenario: Integrated into RC reset generator for STM32 microcontrollers to ensure clean power-on reset assertion.

IC Role / Device Role / Timing Role: Stabilizes capacitor charging voltage to guarantee deterministic reset release timing at 8.2 V threshold.

Use Value: Low 700 nA leakage prevents premature capacitor discharge, maintaining reset hold time integrity over 10-year field life.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BZX79-B8V2,113	±2% tolerance (vs. ±5%), 30 Ω r_dif, 2.5 mV/K S_Z	Higher precision required in feedback loops where <1% output error is mandatory	Select when tighter regulation and lower tempco outweigh cost premium.
1N4736A	8.2 V nominal, ±5%, 35 Ω r_dif, TO-92 package, P_tot = 1 W	Higher power handling needed; requires through-hole PCB layout and larger footprint	Choose for legacy designs requiring 1 W dissipation or TO-92 compatibility.

Compared with BZX79-C8V2,143, the BZX79-B8V2,113 offers superior accuracy and lower dynamic impedance but at higher unit cost, while the 1N4736A trades miniaturization for higher power margin and different mechanical fit - selection depends on whether precision, size, or thermal headroom dominates the design constraint.

Availability

BZX79-C8V2,143 is available at Aetrix Electronics and suitable for power supply feedback, sensor biasing, overvoltage clamping, and microcontroller reset circuits requiring stable component supply across automotive, industrial, and consumer electronics programs.

Supply support for BZX79-C8V2,143 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, specializing in high-volume, high-reliability components for automotive, industrial, and computing markets.

The BZX79 series belongs to Nexperia's voltage regulator diode product line, engineered for low-power, cost-sensitive voltage reference and stabilization in space-constrained PCB layouts where DO-35 packaging and ±5% tolerance meet functional requirements.

FAQ

What is the maximum continuous reverse voltage before breakdown?

The BZX79-C8V2,143 has a nominal Zener voltage of 8.2 V at 5 mA test current, with guaranteed breakdown occurring between 8.04 V and 8.36 V. It is not rated for continuous operation below this range - sustained reverse bias below 8.04 V results in sub-threshold leakage only, not regulation.

Can this diode replace a 1N4736A in existing designs?

Yes, electrically - both regulate at 8.2 V with ±5% tolerance - but mechanical replacement requires verification: BZX79-C8V2,143 uses DO-35 glass package (1.85 mm diameter), while 1N4736A uses TO-92 (4.5 mm wide). PCB footprint, thermal path, and mounting method differ significantly.

What is the recommended minimum Zener test current for stable regulation?

Data sheet specifies stable regulation performance at I_Z = 5 mA. Operation below 1 mA increases differential resistance and degrades voltage stability; for reliable reference behavior, maintain ≥3 mA in production circuits, especially across temperature extremes.

Does this part have AEC-Q200 qualification for automotive use?

No - the BZX79-C8V2,143 is not AEC-Q200 qualified. Nexperia offers AEC-Q200 versions under the BZX84-C8V2 and PZM8.2B families. This part meets industrial-grade reliability but lacks automotive stress-test validation for temperature cycling, humidity, and vibration.

BZX79-C8V2,143 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):: 8.2 V

Tolerance:: ±5%

Power - Max:: 400 mW

Impedance (Max) (Zzt):: 15 Ohms

Current - Reverse Leakage @ Vr:: 700 nA @ 5 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-C8V2,143 FAQ

1.How can I place an order for BZX79-C8V2,143 through Aetrix?

Please submit a Request for Quotation (RFQ) for BZX79-C8V2,143 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-C8V2,143 reliable?

The price and inventory of BZX79-C8V2,143 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX79-C8V2,143 is usually 5 days.

3.What payment methods are accepted for BZX79-C8V2,143?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX79-C8V2,143 transactions.

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4.How is shipping managed for BZX79-C8V2,143?

BZX79-C8V2,143 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZX79-C8V2,143 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-C8V2,143?

For technical support, including BZX79-C8V2,143 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX79-C8V2,143 requirements.

6.How does Aetrix verify that BZX79-C8V2,143 is sourced from the original manufacturer or authorized distributors?

All BZX79-C8V2,143 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-C8V2,143 meets industry standards.

7.What is the process for return or replacement of BZX79-C8V2,143?

All BZX79-C8V2,143 units undergo pre-shipment inspection (PSI). If there is an issue with BZX79-C8V2,143, 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-C8V2,143 part is unused and in its original packaging.

Return procedure for BZX79-C8V2,143:

1.Submit a request within 90 days.

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

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