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

Nexperia USA Inc. BZX79-C2V4,143

Name: BZX79-C2V4,143
Brand: Nexperia USA Inc.
SKU: BZX79-C2V4,143
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BZX79-C2V4,143

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

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

Datasheet:: BZX79-C2V4,143.pdf

Description:: DIODE ZENER 2.4V 400MW ALF2

Quantity:: RFQ Add To RFQ list

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Inventory:5,201

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Product details

Overview

BZX79-C2V4,143 from Nexperia is a ±5% tolerance Zener voltage regulator diode with nominal 2.4 V breakdown voltage at 5 mA test current, 600 Ω max differential resistance, and −3.5 to −1.6 mV/K temperature coefficient. It operates as a low-power voltage reference in bias networks, power supply feedback paths, and overvoltage protection circuits, rated for 500 mW total power dissipation at 50 °C ambient.

For engineers reviewing the BZX79-C2V4,143 datasheet, BZX79-C2V4,143 pinout, BZX79-C2V4,143 application, or BZX79-C2V4,143 equivalent, this part serves as a cost-optimized, through-hole voltage reference where ±5% tolerance and DO-35 package compatibility are design requirements - particularly in legacy industrial controls, analog sensor conditioning, and low-current LED biasing.

Technical Context

This Zener diode functions in reverse-biased avalanche mode to maintain stable DC voltage across its terminals under varying load and input conditions. Its 2.4 V nominal Zener voltage is specified at I_Ztest = 5 mA, with maximum reverse current of 50 μA at V_R = 1 V and forward voltage ≤ 0.9 V at I_F = 10 mA.

The device exhibits a negative temperature coefficient (−3.5 to −1.6 mV/K), indicating decreasing Zener voltage with rising junction temperature - critical for thermal drift analysis in precision references. Its hermetically sealed SOD27 (DO-35) glass package ensures long-term stability and moisture resistance in non-condensing environments.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	2.4 V nominal at 5 mA; range 2.2–2.6 V (±5%) defines usable regulation window in feedback loops
Differential Resistance (r_dif)	≤600 Ω max at 5 mA; determines output impedance and load regulation error
Temperature Coefficient (S_Z)	−3.5 to −1.6 mV/K; quantifies voltage drift per degree Celsius rise in junction temperature
Reverse Current (I_R)	≤50 μA at V_R = 1 V; sets minimum bias current needed to avoid premature conduction
Total Power Dissipation (P_tot)	500 mW at T_amb = 50 °C; limits continuous operating current to ~208 mA at 2.4 V
Junction-to-Ambient R_th	380 K/W; defines thermal rise per watt - e.g., 500 mW causes ~190 K rise above ambient
Package	SOD27 (DO-35); axial-leaded, hermetically sealed glass housing for reliability in harsh environments

Pinout & Package

Two-terminal axial-leaded device in SOD27 (DO-35) glass package; cathode identified by band marking. No internal pin numbering - anode and cathode are unidirectional terminals only.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry / Reverse bias return path	Connected to lower-potential node in Zener configuration; carries full load current during regulation
Cathode	Forward current exit / Reverse bias voltage reference node	Marked terminal; connected to regulated output node; establishes reference potential for feedback networks

Key Features

Feature	Design Value
±5% Zener voltage tolerance	Enables cost-sensitive designs where tight regulation is not required - e.g., non-critical biasing or clamping
500 mW power rating	Supports up to ~200 mA regulation current at 2.4 V without heatsinking in standard PCB layouts
Hermetic SOD27 glass package	Provides long-term parameter stability and immunity to humidity-induced leakage degradation
−3.5 to −1.6 mV/K tempco	Allows predictable thermal compensation when paired with positive-tempco components in reference circuits

Applications

Power Supply Feedback Reference

Overvoltage Clamp Protection

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

IC Role / Device Role / Timing Role: Provides stable 2.4 V reference point for error amplifier comparison.

Use Value: Enables accurate output setting within ±5% tolerance while minimizing component count and cost.

Use Scenario: Placed across microcontroller I/O pins to limit transient voltages during ESD events.

IC Role / Device Role / Timing Role: Acts as shunt clamp, conducting excess energy when voltage exceeds 2.4 V + V_f.

Use Value: Limits peak voltage to safe levels (<3 V) without adding series resistance that degrades signal integrity.

Analog Sensor Bias Network

LED Constant-Current Bias

Use Scenario: Supplies fixed bias voltage to bridge sensors or op-amp input stages in industrial transmitters.

IC Role / Device Role / Timing Role: Delivers stable excitation voltage independent of supply ripple or load variation.

Use Value: Reduces measurement drift caused by supply fluctuations; supports ratiometric ADC architectures.

Use Scenario: Sets reference voltage for LM317-based constant-current LED driver circuits.

IC Role / Device Role / Timing Role: Defines current-setting voltage across sense resistor (I_OUT = V_Z/R_sense).

Use Value: Enables precise LED current control (e.g., 20 mA with 120 Ω sense resistor) using low-cost discrete parts.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
1N4730A	Same 3.9 V nominal voltage but different tolerance (±5% vs. ±10%), higher P_tot (1 W), DO-41 package	Not interchangeable due to 3.9 V vs. 2.4 V; requires circuit redesign	Select only if 3.9 V reference is acceptable and higher power handling is needed
BZX79-B2V4,113	Same 2.4 V nominal, tighter ±2% tolerance, identical SOD27 package and thermal specs	Direct functional replacement where improved voltage accuracy is required	Choose for precision references; expect minor cost increase and possible lead-time variance

Compared with BZX79-C2V4,143, the BZX79-B2V4,113 offers tighter voltage control at no thermal or packaging penalty, while the 1N4730A provides higher power capacity but at incompatible voltage and package - making the former a drop-in upgrade and the latter a system-level redesign candidate.

Availability

BZX79-C2V4,143 is available at Aetrix Electronics and suitable for industrial sensor interfaces, legacy power supply designs, and ESD protection circuits requiring stable component supply and long-lifecycle support.

Supply support for BZX79-C2V4,143 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 semiconductor supplier specializing in high-volume discrete, logic, and PowerMOS devices, with strong focus on automotive, industrial, and consumer markets.

The BZX79 series belongs to Nexperia's standard Zener diode product line, designed for general-purpose voltage regulation and reference applications where reliability, cost efficiency, and through-hole compatibility are prioritized.

FAQ

What is the maximum continuous reverse current this diode can handle at 2.4 V?

The BZX79-C2V4,143 is not rated for continuous operation at its Zener voltage - it is specified for reverse current up to 5 mA (IZtest) for regulation testing. Continuous reverse current must be limited by external series resistance to ensure power dissipation stays ≤500 mW, corresponding to ≤208 mA at 2.4 V in ideal thermal conditions.

Can this diode be used in surface-mount designs?

No - the BZX79-C2V4,143 uses a through-hole SOD27 (DO-35) axial glass package with leads intended for PCB hole mounting. For SMT equivalents, consider Nexperia's BZX384-C2V4 (SOT-23) or BZX584-C2V4 (SOD-523), which share the same 2.4 V ±5% specification but differ in package and thermal performance.

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

With a typical SZ of −2.5 mV/K near 25 °C, the Zener voltage decreases ~250 mV across a 100 K range - resulting in ~10% deviation from 2.4 V at extremes. This drift must be compensated in precision applications using matched tempcos or calibration; it is acceptable for non-critical biasing where ±10% total error is tolerable.

Is this part RoHS compliant and halogen-free?

Yes - Nexperia confirms BZX79-C2V4,143 complies with RoHS Directive 2011/65/EU and is halogen-free per IEC 61249-2-21, with lead-free solderability verified per J-STD-020. Full compliance documentation is available in Nexperia's product change notifications and material declarations.

BZX79-C2V4,143 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):: 2.4 V

Tolerance:: ±5%

Power - Max:: 400 mW

Impedance (Max) (Zzt):: 100 Ohms

Current - Reverse Leakage @ Vr:: 50 µA @ 1 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-C2V4,143 FAQ

1.How can I place an order for BZX79-C2V4,143 through Aetrix?

Please submit a Request for Quotation (RFQ) for BZX79-C2V4,143 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-C2V4,143 reliable?

The price and inventory of BZX79-C2V4,143 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX79-C2V4,143 is usually 5 days.

3.What payment methods are accepted for BZX79-C2V4,143?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX79-C2V4,143 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZX79-C2V4,143?

BZX79-C2V4,143 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZX79-C2V4,143 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-C2V4,143?

For technical support, including BZX79-C2V4,143 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX79-C2V4,143 requirements.

6.How does Aetrix verify that BZX79-C2V4,143 is sourced from the original manufacturer or authorized distributors?

All BZX79-C2V4,143 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-C2V4,143 meets industry standards.

7.What is the process for return or replacement of BZX79-C2V4,143?

All BZX79-C2V4,143 units undergo pre-shipment inspection (PSI). If there is an issue with BZX79-C2V4,143, 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-C2V4,143 part is unused and in its original packaging.

Return procedure for BZX79-C2V4,143:

1.Submit a request within 90 days.

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

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