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

Nexperia USA Inc. BZX79-B47,143

Name: BZX79-B47,143
Brand: Nexperia USA Inc.
SKU: BZX79-B47,143
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BZX79-B47,143

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

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

Datasheet:: BZX79-B47,143.pdf

Description:: DIODE ZENER 47V 400MW ALF2

Quantity:: RFQ Add To RFQ list

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Inventory:8,694

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Product details

Overview

BZX79-B47,143 from Nexperia is a ±2% tolerance Zener voltage regulator diode with nominal 47 V regulation at 2 mA test current, 85 Ω typical differential resistance, and −1.4 mV/K temperature coefficient. It operates in low-power stabilization circuits requiring stable reference voltages under 500 mW dissipation in hermetically sealed DO-35 (SOD27) glass packages.

For engineers reviewing the BZX79-B47,143 datasheet, BZX79-B47,143 pinout, BZX79-B47,143 application, or BZX79-B47,143 equivalent, key selection criteria include Zener voltage tolerance, thermal coefficient, non-repetitive surge capability (40 W), junction-to-ambient thermal resistance (380 K/W), and reverse leakage at VR = 2 V (≤3 μA).

Technical Context

This device functions as a two-terminal passive voltage reference, relying on controlled reverse breakdown in silicon PN junctions. Its regulation accuracy depends on stable 2 mA test current, defined differential resistance (85 Ω typ.), and predictable temperature coefficient (−1.4 mV/K) over 25–150 °C.

Designed for DC biasing and low-current voltage clamping, it delivers 47.0 V ±2% (46.1–47.9 V) regulation with ≤3 μA reverse leakage at VR = 2 V and 50 nA at VR = 0.7 × VZnom, meeting IEC 60134 absolute maximum ratings including 40 W non-repetitive peak reverse power.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	47.0 V ±2% (46.1–47.9 V) at I_Ztest = 2 mA - defines precise DC reference level
Differential Resistance (r_dif)	85 Ω typical at I_Z = 2 mA - determines output impedance and load regulation error
Temperature Coefficient (S_Z)	−1.4 mV/K at I_Z = 2 mA - quantifies voltage drift over operating temperature range
Reverse Leakage (I_R)	≤3 μA at V_R = 2 V; 50 nA at V_R = 0.7 × V_Znom - limits standby current in high-impedance bias networks
Non-repetitive Peak Power (P_ZSM)	40 W at t_p = 100 μs - supports transient overvoltage suppression without failure
Total Power Dissipation (P_tot)	500 mW at T_amb = 50 °C - sets maximum continuous DC power handling in PCB-mounted condition

Pinout & Package

Hermetically sealed axial-leaded glass package per SOD27 (DO-35) standard: 4.25 mm body length, 1.85 mm max diameter, 25.4 mm lead spacing, cathode indicated by black band.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward conduction terminal / low-voltage reference node	Connected to circuit ground or lower potential; enables forward bias operation below 0.9 V
Cathode	Reverse breakdown terminal / regulated output node	Marked with black band; supplies stable 47 V when reverse biased above breakdown threshold

Key Features

Feature	Design Value
±2% Zener voltage tolerance	Enables precision reference generation without post-calibration in analog sensor interfaces and power supply feedback loops
Hermetic glass SOD27 (DO-35) package	Ensures long-term parameter stability and moisture resistance in industrial environments up to +200 °C storage temperature
40 W non-repetitive peak reverse power	Provides robust ESD and surge immunity in low-energy protection circuits without external limiting resistors
−1.4 mV/K temperature coefficient	Minimizes drift-induced errors in temperature-sensitive instrumentation where 47 V reference must remain stable across 25–125 °C

Applications

Industrial Sensor Biasing

Power Supply Feedback Reference

Use Scenario: Providing stable excitation voltage to bridge-based pressure transducers in factory automation PLC modules.

IC Role / Device Role / Timing Role: Passive Zener reference node establishing fixed 47 V bias point for Wheatstone bridge operation.

Use Value: ±2% tolerance and −1.4 mV/K TC ensure <0.5% full-scale error contribution across −40 to +85 °C ambient range.

Use Scenario: Setting output voltage in isolated flyback converter feedback network using optocoupler-coupled error amplifier.

IC Role / Device Role / Timing Role: Precision shunt reference defining secondary-side regulation threshold before optocoupler activation.

Use Value: 85 Ω differential resistance maintains tight regulation despite LED current variations in optocoupler input stage.

Overvoltage Clamp for MCU I/O

Calibration Reference in Test Equipment

Use Scenario: Protecting 3.3 V microcontroller GPIO pins against accidental 24 V field wiring faults in building control systems.

IC Role / Device Role / Timing Role: Low-energy transient suppressor clamping fault voltage to safe level during short-duration surges.

Use Value: 40 W non-repetitive peak power rating absorbs 100 μs transients without degradation, preserving long-term reliability.

Use Scenario: Serving as traceable 47.0 V calibration standard in handheld multimeter reference subsystems.

IC Role / Device Role / Timing Role: Primary voltage reference source for ADC offset and gain adjustment routines.

Use Value: Hermetic glass packaging ensures <10 ppm/year parameter drift, supporting annual recalibration intervals without replacement.

Availability

BZX79-B47,143 is available at Aetrix Electronics and suitable for industrial sensor biasing, power supply feedback references, overvoltage clamping, and calibration reference applications requiring stable component supply and long-term parametric consistency.

Supply support for BZX79-B47,143 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 automotive, industrial, computing, and consumer applications.

The BZX79 series belongs to Nexperia's precision Zener voltage regulator portfolio, engineered for stable DC reference generation and low-power voltage clamping in space-constrained, cost-sensitive designs.

FAQ

What is the recommended test current for measuring V_Z of BZX79-B47,143?

The datasheet specifies 2 mA as the standard test current (I_Ztest) for verifying nominal 47.0 V Zener voltage. This current ensures stable breakdown operation while minimizing self-heating effects; measurements at other currents require correction using the 85 Ω typical differential resistance value.

Can BZX79-B47,143 be used in surface-mount designs?

No - BZX79-B47,143 uses an axial-leaded SOD27 (DO-35) glass package with 25.4 mm lead spacing, designed exclusively for through-hole PCB mounting. Surface-mount alternatives require different part numbers such as PZM4700 series in SOT23 or SOD123 packages.

How does the −1.4 mV/K temperature coefficient affect regulation accuracy?

At 47 V nominal, this coefficient causes approximately −0.03% per °C change in output voltage. Over a 100 °C range (25–125 °C), total drift is ~−1.4 V, making it suitable for applications where reference stability within ±1.5% is acceptable without active compensation.

What is the maximum continuous reverse voltage before breakdown?

The device begins controlled Zener breakdown at its specified 47.0 V nominal voltage. Continuous reverse voltage must not exceed this value without current limiting; operation above 47.9 V (max V_Z) risks thermal runaway unless series resistance restricts current to ≤2 mA under worst-case conditions.

BZX79-B47,143 Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: -

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

Packaging:: Tape & Box (TB)

Product Status:: Active

Voltage - Zener (Nom) (Vz):: 47 V

Tolerance:: ±2%

Power - Max:: 400 mW

Impedance (Max) (Zzt):: 170 Ohms

Current - Reverse Leakage @ Vr:: 50 nA @ 32.9 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-B47,143 FAQ

1.How can I place an order for BZX79-B47,143 through Aetrix?

Please submit a Request for Quotation (RFQ) for BZX79-B47,143 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-B47,143 reliable?

The price and inventory of BZX79-B47,143 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX79-B47,143 is usually 5 days.

3.What payment methods are accepted for BZX79-B47,143?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX79-B47,143 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZX79-B47,143?

BZX79-B47,143 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZX79-B47,143 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-B47,143?

For technical support, including BZX79-B47,143 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX79-B47,143 requirements.

6.How does Aetrix verify that BZX79-B47,143 is sourced from the original manufacturer or authorized distributors?

All BZX79-B47,143 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-B47,143 meets industry standards.

7.What is the process for return or replacement of BZX79-B47,143?

All BZX79-B47,143 units undergo pre-shipment inspection (PSI). If there is an issue with BZX79-B47,143, 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-B47,143 part is unused and in its original packaging.

Return procedure for BZX79-B47,143:

1.Submit a request within 90 days.

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

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