Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

Nexperia USA Inc. BZX79-B8V2,143

Name: BZX79-B8V2,143
Brand: Nexperia USA Inc.
SKU: BZX79-B8V2,143
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: BZX79-B8V2,143

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

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

Datasheet:: BZX79-B8V2,143.pdf

Description:: DIODE ZENER 8.2V 400MW ALF2

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:4,990

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

BZX79-B8V2,143 from Nexperia is a ±2% tolerance Zener voltage regulator diode in a hermetically sealed SOD27 (DO-35) glass package, rated for 8.2 V nominal Zener voltage at 5 mA test current, 40 Ω typical differential resistance, and 700 nA reverse leakage at 5 V. It delivers stable low-power voltage reference or stabilization in linear power supplies and sensor biasing circuits.

For engineers reviewing the BZX79-B8V2,143 datasheet, BZX79-B8V2,143 pinout, BZX79-B8V2,143 application, or BZX79-B8V2,143 equivalent, this page provides verified electrical parameters, thermal behavior, junction-to-ambient thermal resistance, temperature coefficient, and validated alternative parts for precision voltage reference design.

Technical Context

This Zener diode operates in reverse breakdown mode with a tightly controlled 8.04–8.36 V working voltage range at I_Z = 5 mA, exhibiting a positive temperature coefficient of +3.2 to +6.2 mV/K-enabling predictable drift compensation in temperature-sensitive references. Its 40 Ω typical differential resistance ensures minimal output impedance under load variation.

The device uses axial-leaded SOD27 packaging with cathode band marking, optimized for through-hole mounting on PCBs without metallization pads. Thermal resistance from junction to ambient is 380 K/W (lead length ≤8 mm), limiting continuous dissipation to 400 mW at T_amb = 50 °C per derating curve.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	8.04–8.36 V at I_Z = 5 mA - defines stable regulation point for low-noise reference design
Differential Resistance (r_dif)	40–80 Ω - determines output impedance and load regulation error
Reverse Leakage (I_R)	700 nA at V_R = 5 V - enables ultra-low quiescent current in battery-powered references
Temperature Coefficient (S_Z)	+3.2 to +6.2 mV/K - allows predictable thermal drift modeling and compensation
Total Power Dissipation (P_tot)	500 mW at T_amb = 50 °C - sets maximum continuous bias current limit (≈61 mA at 8.2 V)
Junction-to-Ambient R_th	380 K/W - governs thermal rise under sustained load; requires PCB layout awareness
Package	SOD27 (DO-35) - hermetic glass axial package with cathode band; compatible with wave soldering

Pinout & Package

Hermetically sealed SOD27 (DO-35) glass package with axial leads; cathode identified by a colored band. Lead diameter: 0.56 mm max; body length: 4.25 mm max; overall length: ≥25.4 mm.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward conduction terminal / low-side connection in Zener configuration	Connected to ground or lower potential node when used as shunt regulator
Cathode	Reverse breakdown terminal / high-side connection in Zener configuration	Marked with band; connected to input voltage source and load return path

Key Features

Feature	Design Value
±2% Zener voltage tolerance	Enables precise voltage reference without post-calibration in production-grade analog circuits
Non-repetitive peak reverse power: 40 W	Supports transient overvoltage clamping (e.g., ESD, inductive kick) with 100 μs pulse width
Low reverse leakage: 700 nA @ 5 V	Minimizes standby current in always-on sensor bias networks and low-power IoT nodes
Hermetic SOD27 glass package	Ensures long-term parameter stability and moisture resistance in industrial environments
JEDEC DO-35 footprint compatibility	Allows drop-in replacement in legacy designs using standard axial-leaded Zener footprints

Applications

Power Supply Reference

Sensor Biasing

Use Scenario: Providing stable 8.2 V reference for op-amp feedback networks in linear regulators and LDOs.

IC Role / Device Role / Timing Role: Shunt voltage reference establishing precise DC operating point for control loop stability.

Use Value: Tight ±2% tolerance and low 40 Ω dynamic impedance reduce output voltage drift under line/load variation.

Use Scenario: Biasing bridge-based pressure or temperature sensors requiring stable excitation voltage.

IC Role / Device Role / Timing Role: Low-drift Zener source delivering constant current to sensor elements via series resistor.

Use Value: +3.2 to +6.2 mV/K temperature coefficient enables predictable thermal compensation in analog front-ends.

Overvoltage Protection

Signal Level Clamping

Use Scenario: Protecting microcontroller ADC inputs from transient surges exceeding 8.2 V.

IC Role / Device Role / Timing Role: Passive clamp limiting input voltage to safe Zener breakdown level during fault events.

Use Value: 40 W non-repetitive peak power rating handles 100 μs transients without degradation.

Use Scenario: Limiting RS-232 signal swing to prevent damage to legacy logic-level receivers.

IC Role / Device Role / Timing Role: Bidirectional clamping element (with series resistor) constraining signal amplitude.

Use Value: Low 700 nA leakage avoids loading high-impedance signal paths during normal operation.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MMBZ5231BS-7-F	Surface-mount SOT-23 package; same 8.2 V nominal, ±5% tolerance; 100 Ω r_dif; 1 μA I_R @ 5 V	Requires PCB redesign for SMT assembly; higher dynamic impedance increases regulation error	Select when space-constrained layouts or automated assembly demand SMT compatibility
BZX84-C8V2	SOT-23 package; ±5% tolerance; 8.2 V nominal; 90 Ω r_dif; 1 μA I_R @ 5 V; P_tot = 300 mW	Lower power rating and looser tolerance reduce accuracy in precision references	Choose for cost-sensitive consumer applications where ±5% tolerance is acceptable

Compared with MMBZ5231BS-7-F and BZX84-C8V2, BZX79-B8V2,143 offers superior voltage accuracy (±2% vs. ±5%), lower dynamic impedance (40 Ω vs. ≥90 Ω), and higher surge capability (40 W vs. ~20 W), making it preferred for industrial-grade reference and protection circuits where stability and robustness are critical.

Availability

BZX79-B8V2,143 is available at Aetrix Electronics and suitable for linear power supply references, sensor biasing networks, overvoltage protection circuits, and signal-level clamping applications requiring stable component supply across automotive, industrial, and computing end markets.

Supply support for BZX79-B8V2,143 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, logic, and PowerMOS semiconductors, serving automotive, industrial, computing, and consumer markets with high-reliability, high-volume components.

The BZX79 series belongs to Nexperia's voltage regulator diode product line, engineered for precision low-power voltage reference and stabilization in cost-sensitive, high-reliability applications where hermetic packaging and tight tolerances are essential.

FAQ

What is the maximum continuous Zener current for BZX79-B8V2,143 at 50 °C ambient?

At T_amb = 50 °C, the maximum continuous power dissipation is 400 mW (per note 1 in datasheet). With a nominal Zener voltage of 8.2 V, this supports up to approximately 48.8 mA average Zener current (400 mW ÷ 8.2 V). Derating applies above 50 °C per the thermal resistance curve.

How does the temperature coefficient affect regulation accuracy over –40 °C to +125 °C?

The BZX79-B8V2,143 exhibits a +3.2 to +6.2 mV/K temperature coefficient. Over a 165 K range (–40 °C to +125 °C), this causes a total drift of +0.53 V to +1.02 V-i.e., regulation shifts from ~7.7 V to ~9.2 V. For high-accuracy systems, this must be compensated via circuit design or calibration.

Can BZX79-B8V2,143 be used in parallel for higher power handling?

No-Zener diodes cannot be reliably paralleled due to mismatched breakdown voltages and thermal runaway risk. Each device must be individually sized for its power requirement. For higher power, use a series pass transistor with BZX79-B8V2,143 as reference, not direct parallel connection.

Is the SOD27 package RoHS compliant and lead-free?

Yes-the SOD27 package for BZX79-B8V2,143 meets RoHS Directive 2011/65/EU and is lead-free. Nexperia confirms full compliance for this part number, including exemption 7a (Pb in glass frits) where applicable in hermetic glass construction.

BZX79-B8V2,143 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:: ±2%

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-B8V2,143 FAQ

1.How can I place an order for BZX79-B8V2,143 through Aetrix?

Please submit a Request for Quotation (RFQ) for BZX79-B8V2,143 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-B8V2,143 reliable?

The price and inventory of BZX79-B8V2,143 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX79-B8V2,143 is usually 5 days.

3.What payment methods are accepted for BZX79-B8V2,143?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX79-B8V2,143 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZX79-B8V2,143?

BZX79-B8V2,143 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZX79-B8V2,143 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-B8V2,143?

For technical support, including BZX79-B8V2,143 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX79-B8V2,143 requirements.

6.How does Aetrix verify that BZX79-B8V2,143 is sourced from the original manufacturer or authorized distributors?

All BZX79-B8V2,143 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-B8V2,143 meets industry standards.

7.What is the process for return or replacement of BZX79-B8V2,143?

All BZX79-B8V2,143 units undergo pre-shipment inspection (PSI). If there is an issue with BZX79-B8V2,143, 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-B8V2,143 part is unused and in its original packaging.

Return procedure for BZX79-B8V2,143:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-03 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-01 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…