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Nexperia USA Inc. BZX79-B4V7,143
- Part No.:
- BZX79-B4V7,143
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
BZX79-B4V7,143.pdf
- Description:
- DIODE ZENER 4.7V 400MW ALF2
- Quantity:
- Payment:
- Shipping:
Inventory:4,260
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Product details
Overview
BZX79-B4V7,143 from Nexperia is a ±2% tolerance Zener voltage regulator diode in a hermetically sealed SOD27 (DO-35) glass package, rated for 4.7 V nominal Zener voltage at 5 mA test current, 425 Ω typical differential resistance, and −1.4 mV/K temperature coefficient. It delivers stable low-voltage reference or stabilization in power supply feedback paths, sensor biasing circuits, and overvoltage protection clamps.
For engineers reviewing the BZX79-B4V7,143 datasheet, BZX79-B4V7,143 pinout, BZX79-B4V7,143 application, or BZX79-B4V7,143 equivalent, this part supports precision voltage referencing where tight tolerance, low dynamic impedance, and predictable thermal drift are required - especially in space-constrained analog front-ends and industrial control signal conditioning.
Technical Context
This Zener diode operates in reverse breakdown mode with a specified Zener voltage of 4.61 V to 4.79 V at IZ = 5 mA, exhibiting a differential resistance of ≤500 Ω (typ. 425 Ω) and a negative temperature coefficient of −3.5 to −1.4 mV/K. Its low 3 μA reverse leakage at VR = 2 V ensures minimal quiescent current in standby regulation.
Designed for DC and low-frequency stabilization, it supports non-repetitive surge handling up to 40 W for 100 μs pulses and continuous dissipation of 500 mW at Tamb = 50 °C with standard PCB mounting. The axial-leaded SOD27 package enables through-hole reliability without thermal pad requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.61 V to 4.79 V at IZ = 5 mA - defines precise regulation point for feedback loops |
| Tolerance | ±2% - enables tighter output voltage control vs. ±5% C-series variants |
| Differential Resistance (rdif) | ≤500 Ω (typ. 425 Ω) - determines load regulation error under varying current |
| Temperature Coefficient (SZ) | −3.5 to −1.4 mV/K - quantifies VZ drift across operating temperature range |
| Reverse Leakage (IR) | 3 μA max. at VR = 2 V - limits standby power loss in high-impedance bias networks |
| Power Dissipation (Ptot) | 500 mW at Tamb = 50 °C - sets maximum continuous DC power handling on standard PCB |
| Package | SOD27 (DO-35) - hermetically sealed glass axial package with cathode band marking |
Pinout & Package
Hermetically sealed glass SOD27 (DO-35) package with axial leads; cathode identified by a colored band. Mounting requires no metallization pad; max. lead length 8 mm per thermal spec.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-side connection in Zener configuration | Connected to lower potential node when used as shunt regulator |
| Cathode | Zener breakdown terminal / reference output node | Marked with band; connected to regulated voltage rail or feedback point |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance | Enables tighter output regulation in feedback networks without post-calibration |
| Low 3 μA reverse leakage at 2 V | Reduces bias current error in high-impedance voltage divider references |
| 425 Ω typical differential resistance | Minimizes output voltage variation under ±1 mA load current shifts |
| −1.4 mV/K tempco (typ.) | Supports stable reference performance across −65 °C to +200 °C junction range |
| 40 W non-repetitive surge rating | Provides transient overvoltage clamping capability for ESD/inductive spike suppression |
Applications
| Industrial Power Supply Feedback | Automotive Sensor Biasing |
|---|---|
Use Scenario: Regulating output voltage in isolated flyback or buck-derived auxiliary supplies. IC Role / Device Role / Timing Role: Shunt voltage reference in optocoupler feedback loop. Use Value: ±2% tolerance ensures <±1% output variation across line/load/temperature without trimming. | Use Scenario: Providing stable bias voltage to pressure or temperature sensor bridges. IC Role / Device Role / Timing Role: Low-drift DC reference source for ratiometric analog signal conditioning. Use Value: −1.4 mV/K tempco minimizes offset drift in 0–125 °C ambient operation. |
| Overvoltage Clamp Protection | Portable Device Battery Monitoring |
Use Scenario: Clamping transient surges on 5 V logic rails during hot-plug or ESD events. IC Role / Device Role / Timing Role: Passive shunt clamp activated above 4.7 V threshold. Use Value: 40 W peak pulse rating absorbs 100 μs spikes without degradation. | Use Scenario: Monitoring Li-ion cell voltage via resistive divider into ADC input. IC Role / Device Role / Timing Role: Precision reference for ADC full-scale calibration. Use Value: 425 Ω dynamic impedance ensures <0.5 LSB error under 10 kΩ divider loading. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4732A | 4.7 V ±5%, 600 Ω rdif, DO-41 package | Higher tolerance and impedance; less suitable for precision feedback | Select only if cost sensitivity outweighs regulation accuracy needs |
| BZX84-C4V7 | 4.7 V ±5%, SOT-23 surface-mount, 600 Ω rdif | Smaller footprint but higher leakage (5 μA) and lower surge rating (1 W) | Choose for space-constrained PCBs where surge immunity is secondary |
Compared with 1N4732A and BZX84-C4V7, BZX79-B4V7,143 offers superior voltage accuracy and lower dynamic impedance in a robust through-hole package - making it optimal for industrial feedback and biasing where long-term stability and surge resilience matter.
Availability
BZX79-B4V7,143 is available at Aetrix Electronics and suitable for industrial power supply feedback, automotive sensor biasing, overvoltage clamp protection, and portable device battery monitoring requiring stable component supply across extended production lifecycles.
Supply support for BZX79-B4V7,143 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-volume, high-reliability components.
The BZX79 series belongs to Nexperia's legacy Zener diode portfolio, engineered specifically for low-power voltage regulation and reference applications demanding tight tolerance, repeatable breakdown characteristics, and hermetic reliability.
FAQ
What is the maximum continuous power dissipation for BZX79-B4V7,143?
The BZX79-B4V7,143 is rated for 500 mW total power dissipation at an ambient temperature of 50 °C with standard PCB mounting and 8 mm lead length. Derating is required above 50 °C at 3.3 mW/°C based on its 380 K/W junction-to-ambient thermal resistance.
How does the temperature coefficient affect regulation accuracy?
With a typical temperature coefficient of −1.4 mV/K, the Zener voltage decreases by ~1.4 mV per degree Celsius rise in junction temperature. Over a 100 °C range, this results in ~140 mV drift - critical to account in high-precision references but manageable with layout thermal symmetry or compensation networks.
Can BZX79-B4V7,143 be used in surface-mount designs?
No - BZX79-B4V7,143 uses the axial-leaded SOD27 (DO-35) through-hole package and is not compatible with SMT assembly. For surface-mount equivalents, consider the BZX84-C4V7 (SOT-23) or MMBZ4685 (SOT-23), though both offer only ±5% tolerance and higher dynamic impedance.
What is the reverse leakage current at 2 V?
The reverse leakage current is guaranteed ≤3 μA at VR = 2 V and Tj = 25 °C. This low leakage ensures minimal error in high-impedance voltage divider networks and preserves battery life in always-on monitoring circuits.
BZX79-B4V7,143 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):
- 4.7 V
- Tolerance:
- ±2%
- Power - Max:
- 400 mW
- Impedance (Max) (Zzt):
- 80 Ohms
- Current - Reverse Leakage @ Vr:
- 3 µA @ 2 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-B4V7,143 FAQ
1.How can I place an order for BZX79-B4V7,143 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX79-B4V7,143 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-B4V7,143 reliable?
The price and inventory of BZX79-B4V7,143 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX79-B4V7,143 is usually 5 days.
3.What payment methods are accepted for BZX79-B4V7,143?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX79-B4V7,143 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX79-B4V7,143?
BZX79-B4V7,143 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX79-B4V7,143 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-B4V7,143?
For technical support, including BZX79-B4V7,143 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX79-B4V7,143 requirements.
6.How does Aetrix verify that BZX79-B4V7,143 is sourced from the original manufacturer or authorized distributors?
All BZX79-B4V7,143 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-B4V7,143 meets industry standards.
7.What is the process for return or replacement of BZX79-B4V7,143?
All BZX79-B4V7,143 units undergo pre-shipment inspection (PSI). If there is an issue with BZX79-B4V7,143, 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-B4V7,143 part is unused and in its original packaging.
Return procedure for BZX79-B4V7,143:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX79-B4V7,143 Tags
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