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

Nexperia USA Inc. BZX79-C11,143

Name: BZX79-C11,143
Brand: Nexperia USA Inc.
SKU: BZX79-C11,143
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BZX79-C11,143

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

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

Datasheet:: BZX79-C11,143.pdf

Description:: DIODE ZENER 11V 400MW ALF2

Quantity:: RFQ Add To RFQ list

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Inventory:2,291

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Product details

Overview

BZX79-C11,143 from Nexperia is a ±5% tolerance Zener voltage regulator diode with nominal 11 V breakdown voltage at 5 mA test current, 10 Ω typical differential resistance, and −65 °C to +200 °C junction temperature range. It operates as a low-power voltage reference in bias networks, power supply feedback paths, and overvoltage clamping circuits.

For engineers reviewing the BZX79-C11,143 datasheet, BZX79-C11,143 pinout, BZX79-C11,143 application, or BZX79-C11,143 equivalent, key selection criteria include Zener voltage tolerance (±5%), thermal resistance (380 K/W), non-repetitive peak reverse power (40 W), and DO-35 package compatibility with through-hole PCB assembly.

Technical Context

This discrete Zener diode functions exclusively in reverse-biased breakdown mode, delivering stable reference voltage under controlled current conditions. Its 11 V nominal Zener voltage is specified at I_Ztest = 5 mA, with 10 Ω typical differential resistance ensuring minimal voltage shift across operating current variations.

Temperature coefficient is +5.4 mV/K at 5 mA, indicating positive drift with rising junction temperature - critical for precision reference designs requiring thermal compensation. The device exhibits 150 pF junction capacitance at 0 V reverse bias and 1 MHz, limiting high-frequency noise filtering capability.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	10.8 V to 11.2 V at I_Z = 5 mA - defines stable regulation point for low-current reference use
Differential Resistance (r_dif)	10 Ω typical at I_Z = 5 mA - determines output impedance and load regulation sensitivity
Reverse Current (I_R)	100 nA max at V_R = 8 V - ensures low leakage in standby or high-impedance sensing nodes
Total Power Dissipation (P_tot)	500 mW at T_amb = 50 °C - sets maximum continuous DC power handling on standard PCB
Non-repetitive Peak Power (P_ZSM)	40 W for 100 μs pulse - enables transient overvoltage suppression without failure
Junction Temperature Range (T_j)	−65 °C to +200 °C - supports operation in automotive under-hood and industrial environments

Pinout & Package

Hermetically sealed axial-leaded SOD27 (DO-35) glass package with cathode indicated by a black band. Leads are tinned copper-clad steel; body diameter 1.85 mm, length 4.25 mm, lead spacing 25.4 mm.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward conduction terminal / low-voltage side in reverse-bias operation	Connected to lower potential node when used as shunt regulator; carries forward current up to 250 mA
Cathode	Zener breakdown terminal / regulated voltage output node	Marked with black band; delivers stable 11 V reference when reverse-biased above breakdown threshold

Key Features

Feature	Design Value
±5% Zener voltage tolerance	Enables cost-effective voltage referencing where tight regulation is not required, e.g., power supply feedback dividers
500 mW total power dissipation	Supports continuous operation in compact through-hole designs without heatsinking at ambient ≤50 °C
40 W non-repetitive peak reverse power	Provides robust surge immunity against ESD and line transients in unprotected input stages
−65 °C to +200 °C junction temperature range	Validates suitability for under-hood automotive modules and industrial control enclosures

Applications

Power Supply Feedback

Overvoltage Clamp

Use Scenario: Regulating output voltage of linear regulators via feedback resistor network.

IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 11 V setpoint for error amplifier comparison.

Use Value: Maintains ±1% output stability over load and line variations due to low r_dif and predictable V_Z drift.

Use Scenario: Protecting microcontroller I/O pins from accidental 12 V rail exposure.

IC Role / Device Role / Timing Role: Passive clamping element diverting excess current above 11 V to ground.

Use Value: Limits pin voltage to safe level during hot-plug events without active circuitry or response delay.

Reference Bias Network

Signal Level Shifting

Use Scenario: Establishing stable bias point for op-amp input stages in sensor signal conditioning.

IC Role / Device Role / Timing Role: Low-noise DC reference source replacing resistive divider for improved PSRR.

Use Value: Reduces supply sensitivity by 20 dB compared to resistor-based biasing due to low dynamic impedance.

Use Scenario: Translating 3.3 V logic signals to interface with 12 V analog subsystems.

IC Role / Device Role / Timing Role: Passive level translator using Zener clamp to limit high-side swing.

Use Value: Enables bidirectional signal compatibility without level-shifter ICs or additional power rails.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
1N4740A	10 V nominal Zener voltage, ±5% tolerance, 1000 mW power rating, DO-41 package	Higher power handling but larger footprint; requires different PCB layout and thermal relief	Select when >500 mW continuous dissipation is needed and board space allows DO-41 mounting
BZX79-C10,143	10 V nominal Zener voltage, identical ±5% tolerance, same DO-35 package and thermal specs	Lower reference voltage; suitable for 10 V systems or tighter margin designs	Select when system design targets exactly 10 V regulation and maintains identical mechanical fit

Compared with BZX79-C11,143, the 1N4740A offers higher power capacity but sacrifices PCB area efficiency, while BZX79-C10,143 provides a 1 V lower reference with identical form factor and reliability - enabling direct voltage-scaling substitutions without layout changes.

Availability

BZX79-C11,143 is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC analog input protection, and consumer power adapter feedback loops requiring stable component supply across multi-year production cycles.

Supply support for BZX79-C11,143 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 centers across Asia, Europe, and the Americas.

The BZX79 series belongs to Nexperia's legacy Zener diode portfolio, engineered for cost-sensitive, high-volume applications demanding reliable voltage regulation in automotive, industrial, and consumer electronics.

FAQ

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

The BZX79-C11,143 does not specify a maximum continuous reverse current; instead, its safe operating limit is defined by power dissipation. At 50 °C ambient, it supports up to 45.5 mA reverse current (500 mW ÷ 11 V) before exceeding P_tot. Exceeding this causes thermal runaway and permanent damage.

Can this Zener diode be used in surface-mount designs?

No - the BZX79-C11,143 uses an axial-leaded DO-35 (SOD27) glass package designed exclusively for through-hole mounting. It lacks solder pads or terminations compatible with reflow or wave soldering processes. Surface-mount alternatives include PZM11NB or MMBZ5241B.

How does temperature affect its Zener voltage accuracy?

At 5 mA test current, the BZX79-C11,143 has a +5.4 mV/K temperature coefficient, meaning its Zener voltage increases by approximately 5.4 mV per degree Celsius rise in junction temperature. Over a 100 °C range, this results in ~0.54 V drift - critical for precision references requiring external compensation.

Is this part RoHS compliant and halogen-free?

Yes - Nexperia confirms BZX79-C11,143 meets RoHS Directive 2011/65/EU and is halogen-free per IEC 61249-2-21. The device carries Nexperia's standard green marking and complies with JEDEC J-STD-020 moisture sensitivity level 1 (unlimited floor life).

BZX79-C11,143 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):: 11 V

Tolerance:: ±5%

Power - Max:: 400 mW

Impedance (Max) (Zzt):: 20 Ohms

Current - Reverse Leakage @ Vr:: 100 nA @ 8 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-C11,143 FAQ

1.How can I place an order for BZX79-C11,143 through Aetrix?

Please submit a Request for Quotation (RFQ) for BZX79-C11,143 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-C11,143 reliable?

The price and inventory of BZX79-C11,143 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX79-C11,143 is usually 5 days.

3.What payment methods are accepted for BZX79-C11,143?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX79-C11,143 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZX79-C11,143?

BZX79-C11,143 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZX79-C11,143 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-C11,143?

For technical support, including BZX79-C11,143 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX79-C11,143 requirements.

6.How does Aetrix verify that BZX79-C11,143 is sourced from the original manufacturer or authorized distributors?

All BZX79-C11,143 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-C11,143 meets industry standards.

7.What is the process for return or replacement of BZX79-C11,143?

All BZX79-C11,143 units undergo pre-shipment inspection (PSI). If there is an issue with BZX79-C11,143, 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-C11,143 part is unused and in its original packaging.

Return procedure for BZX79-C11,143:

1.Submit a request within 90 days.

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

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