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Nexperia USA Inc. BZX79-B4V3,113
- Part No.:
- BZX79-B4V3,113
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
BZX79-B4V3,113.pdf
- Description:
- DIODE ZENER 4.3V 400MW ALF2
- Quantity:
- Payment:
- Shipping:
Inventory:9,483
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Product details
Overview
BZX79-B4V3,113 from Nexperia is a ±2% tolerance Zener voltage regulator diode in a hermetically sealed SOD27 (DO-35) glass package, rated for 4.3 V nominal Zener voltage at 5 mA test current, 410 Ω typical differential resistance, and −2.5 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-B4V3,113 datasheet, BZX79-B4V3,113 pinout, BZX79-B4V3,113 application, or BZX79-B4V3,113 equivalent, this part serves as a precision 4.3 V reference with tight ±2% tolerance, low 3 μA reverse leakage at 1 V, and robust 40 W non-repetitive surge capability - critical for compact analog regulation and ESD-tolerant signal conditioning designs.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain a stable DC voltage across its terminals under varying load or input conditions. Its −2.5 mV/K temperature coefficient indicates moderate negative drift with junction temperature rise, requiring thermal-aware placement in precision references.
The device uses axial-leaded SOD27 packaging with cathode band marking, enabling through-hole mounting on PCBs without metallization pads. Its 400–500 mW total power dissipation at Tamb = 50 °C supports continuous regulation in space-constrained linear supplies and interface protection networks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.21 V to 4.39 V at IZ = 5 mA - ensures precise 4.3 V regulation within ±2% tolerance for feedback and reference use. |
| Differential Resistance (rdif) | 410 Ω typical at IZ = 5 mA - defines small-signal impedance in regulation region; impacts load regulation error. |
| Reverse Leakage (IR) | 3 μA max at VR = 1 V - low leakage preserves accuracy in high-impedance bias networks and battery-powered sensors. |
| Temperature Coefficient (SZ) | −2.5 mV/K typical at IZ = 5 mA - quantifies voltage drift per degree; enables thermal compensation design. |
| Non-repetitive Peak Power (PZSM) | 40 W at tp = 100 μs - supports transient overvoltage clamping without failure in surge-prone interfaces. |
| Total Power Dissipation (Ptot) | 500 mW at Tamb = 50 °C - sets maximum continuous DC power handling for thermal design margin. |
| Junction Temperature Range | −65 °C to +200 °C - allows operation in extended industrial and automotive under-hood environments. |
Pinout & Package
Hermetically sealed axial-leaded SOD27 (DO-35) glass package with cathode indicated by a colored 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-side connection in Zener configuration | Connected to lower potential node; carries forward current up to 250 mA during transient conduction. |
| Cathode | Zener breakdown terminal / regulated output node | Marked with band; referenced to system ground or feedback point; maintains stable 4.3 V when reverse-biased above knee voltage. |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance | Enables high-accuracy voltage references without external trimming in analog sensor front-ends and ADC reference buffers. |
| Hermetic SOD27 glass package | Provides long-term reliability and moisture resistance in humid or high-reliability industrial control modules. |
| 40 W non-repetitive peak power rating | Allows single-event transient suppression in low-energy signal lines without requiring additional TVS devices. |
| Low 3 μA reverse leakage at 1 V | Minimizes quiescent current draw in battery-backed real-time clocks and low-power microcontroller reset circuits. |
| −2.5 mV/K temperature coefficient | Supports predictable thermal drift modeling for compensated reference designs in temperature-stable instrumentation. |
Applications
| Power Supply Feedback Reference | Sensor Biasing Network |
|---|---|
Use Scenario: Regulating output voltage of a linear regulator or switching converter via optocoupler-coupled feedback loop. IC Role / Device Role / Timing Role: Zener diode provides precise 4.3 V reference to compare against output voltage and adjust duty cycle or pass transistor bias. Use Value: Tight ±2% tolerance ensures output accuracy within ±1% over line/load/temperature, meeting industrial power spec requirements. | Use Scenario: Providing stable bias voltage to bridge-based pressure or temperature transducers in data acquisition systems. IC Role / Device Role / Timing Role: Acts as low-drift, low-noise voltage reference for Wheatstone bridge excitation and amplifier input offset setting. Use Value: −2.5 mV/K tempco and 410 Ω rdif minimize measurement drift and improve SNR in sub-100 ppm accuracy applications. |
| Overvoltage Clamp for GPIO | Microcontroller Reset Circuit |
Use Scenario: Protecting 3.3 V or 5 V microcontroller I/O pins from ESD or inductive kickback in industrial HMI panels. IC Role / Device Role / Timing Role: Zener conducts in reverse breakdown to clamp transient voltages to ≤4.3 V, diverting surge energy to ground. Use Value: 40 W peak power rating absorbs 100 μs surges up to 10 A without degradation, eliminating need for discrete TVS in cost-sensitive designs. | Use Scenario: Generating a clean, temperature-stable reset signal for ARM Cortex-M MCUs during brown-out conditions. IC Role / Device Role / Timing Role: Forms part of RC-delayed reset circuit where Zener holds reset line high until VCC exceeds 4.3 V. Use Value: Low 3 μA leakage prevents premature discharge of timing capacitor, ensuring reliable reset assertion across −40 °C to +125 °C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ4685,115 | SOT-23 surface-mount package; same 4.3 V nominal, ±5% tolerance; 350 mW Ptot; higher 5 μA leakage at 1 V. | Designed for space-constrained PCB layouts; lacks hermetic seal; unsuitable for high-humidity or long-life deployments. | Select for automated assembly and compact consumer electronics where board space outweighs environmental robustness. |
| BZX84-C4V3,215 | SOT-23 package; ±5% tolerance; 300 mW Ptot; 5 μA leakage at 1 V; no guaranteed tempco spec. | General-purpose replacement with looser tolerance; lower surge rating (25 W); not recommended for precision or high-reliability use. | Choose only for non-critical voltage clamping in cost-driven consumer products with no thermal or lifetime requirements. |
Compared with MMBZ4685,115 and BZX84-C4V3,215, the BZX79-B4V3,113 offers superior long-term stability via hermetic glass packaging, tighter ±2% tolerance for accurate regulation, and higher 40 W surge capability - making it preferred for industrial power management and sensor signal chains where reliability and precision are mandatory.
Availability
BZX79-B4V3,113 is available at Aetrix Electronics and suitable for industrial power supply feedback loops, sensor biasing networks, GPIO overvoltage clamps, and microcontroller reset circuits requiring stable component supply and long-term availability.
Supply support for BZX79-B4V3,113 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 legacy voltage regulator diode product line, engineered for low-power stabilization and precision reference applications in cost-sensitive yet reliability-critical systems.
FAQ
What is the maximum continuous power dissipation for BZX79-B4V3,113?
The BZX79-B4V3,113 has a maximum total power dissipation of 500 mW at ambient temperature of 50 °C with leads mounted per standard PCB layout (lead length ≤8 mm, no metallization pad). At higher ambient temperatures, derating applies per the Rth j-a = 380 K/W thermal resistance specification.
How does the temperature coefficient affect regulation accuracy?
With a typical temperature coefficient of −2.5 mV/K, the Zener voltage decreases by approximately 2.5 mV per Kelvin rise in junction temperature. Over a 100 °C range (e.g., −40 °C to +60 °C), this results in ~250 mV drift - requiring thermal layout awareness or compensation in precision reference designs.
Can BZX79-B4V3,113 be used in surface-mount designs?
No - BZX79-B4V3,113 uses an axial-leaded SOD27 (DO-35) glass package designed exclusively for through-hole mounting. For surface-mount alternatives, consider Nexperia's MMBZ4685,115 (SOT-23) or BZX84-C4V3,215, though both offer only ±5% tolerance and lower surge ratings.
What is the reverse leakage current at 1 V and 25 °C?
Per the datasheet, the maximum reverse leakage current (IR) for BZX79-B4V3,113 is 3 μA at VR = 1 V and Tj = 25 °C. This low leakage supports high-impedance bias networks and extends battery life in always-on monitoring circuits.
BZX79-B4V3,113 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 4.3 V
- Tolerance:
- ±2%
- Power - Max:
- 400 mW
- Impedance (Max) (Zzt):
- 90 Ohms
- Current - Reverse Leakage @ Vr:
- 3 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-B4V3,113 FAQ
1.How can I place an order for BZX79-B4V3,113 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX79-B4V3,113 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-B4V3,113 reliable?
The price and inventory of BZX79-B4V3,113 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX79-B4V3,113 is usually 5 days.
3.What payment methods are accepted for BZX79-B4V3,113?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX79-B4V3,113 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX79-B4V3,113?
BZX79-B4V3,113 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX79-B4V3,113 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-B4V3,113?
For technical support, including BZX79-B4V3,113 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX79-B4V3,113 requirements.
6.How does Aetrix verify that BZX79-B4V3,113 is sourced from the original manufacturer or authorized distributors?
All BZX79-B4V3,113 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-B4V3,113 meets industry standards.
7.What is the process for return or replacement of BZX79-B4V3,113?
All BZX79-B4V3,113 units undergo pre-shipment inspection (PSI). If there is an issue with BZX79-B4V3,113, 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-B4V3,113 part is unused and in its original packaging.
Return procedure for BZX79-B4V3,113:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX79-B4V3,113 Tags
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