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Nexperia USA Inc. BZX79-B2V4,143
- Part No.:
- BZX79-B2V4,143
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
BZX79-B2V4,143.pdf
- Description:
- DIODE ZENER 2.4V 400MW ALF2
- Quantity:
- Payment:
- Shipping:
Inventory:61
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Product details
Overview
BZX79-B2V4,143 from Nexperia is a ±2% tolerance Zener voltage regulator diode in a hermetically sealed SOD27 (DO-35) glass package, rated for 2.4 V nominal Zener voltage at 5 mA test current, 500 mW total power dissipation at 50 °C ambient, and 40 W non-repetitive peak reverse power. It serves as a low-power voltage reference in linear regulators, sensor biasing circuits, and overvoltage protection clamps.
For engineers reviewing the BZX79-B2V4,143 datasheet, BZX79-B2V4,143 pinout, BZX79-B2V4,143 application, or BZX79-B2V4,143 equivalent, key selection criteria include Zener voltage tolerance (±2%), differential resistance (275–600 Ω), temperature coefficient (−3.5 to −1.6 mV/K), reverse leakage at 1 V (50 μA max), and thermal resistance (380 K/W junction-to-ambient).
Technical Context
This device operates as a two-terminal passive voltage reference, relying on controlled avalanche or Zener breakdown in silicon PN junctions. Its regulation behavior is defined by specified test current (IZ = 5 mA), differential resistance (rdif), and temperature coefficient (SZ), with performance validated across −65 °C to +200 °C storage and junction temperature ranges.
The BZX79-B series uses axial-leaded, hermetically sealed glass packaging (SOD27/DO-35) with cathode band marking. Electrical characteristics are specified at Tj = 25 °C unless otherwise noted, and absolute maximum ratings follow IEC 60134, including 250 mA continuous forward current and 40 W non-repetitive peak reverse power at tp = 100 μs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 2.35–2.45 V at IZ = 5 mA; defines stable reference point for low-voltage biasing |
| Tolerance | ±2%; enables precise voltage setting without post-production trimming |
| Differential Resistance (rdif) | 275–600 Ω at IZ = 5 mA; determines load regulation sensitivity and output impedance |
| Temp. Coefficient (SZ) | −3.5 to −1.6 mV/K at IZ = 5 mA; quantifies voltage drift with temperature in reference circuits |
| Reverse Leakage (IR) | ≤50 μA at VR = 1 V; limits quiescent current in standby or high-impedance bias networks |
| Power Dissipation (Ptot) | 500 mW at Tamb = 50 °C; sets maximum continuous DC power handling under standard PCB mounting |
| Junction-to-Ambient Rth | 380 K/W; defines thermal rise per watt under typical leaded PCB conditions |
Pinout & Package
Two-terminal axial-leaded device in SOD27 (DO-35) hermetically sealed glass package; cathode identified by a colored band on the body. Leads are tinned copper-clad steel, suitable for wave or hand soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to circuit ground or lower-potential node; reverse-biased operation requires cathode at higher potential |
| Cathode | Zener breakdown terminal / voltage reference output | Marked with band; supplies regulated voltage when reverse biased above VZ; used as reference node in shunt regulator topologies |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass sealing | Ensures long-term stability and moisture resistance in industrial environments |
| ±2% Zener voltage tolerance | Reduces need for external calibration in precision analog front-ends |
| Low non-repetitive peak power limit (40 W) | Supports transient overvoltage clamping in ESD-prone signal lines |
| Normalized E24 voltage range (2.4–75 V) | Enables drop-in replacement across broad design revisions without layout change |
| Lead-free compatible construction | Meets RoHS requirements for consumer and computing applications |
Applications
| Low-Voltage Sensor Biasing | Microcontroller Reset Circuit |
|---|---|
Use Scenario: Providing stable 2.4 V bias to analog sensor elements (e.g., thermistors, photodiodes) in battery-powered IoT nodes. IC Role / Device Role / Timing Role: Zener diode acts as shunt voltage reference, maintaining constant bias voltage despite supply droop or temperature variation. Use Value: Enables <1% measurement error over −40 to +85 °C due to tight ±2% tolerance and predictable −3.5 mV/K tempco. | Use Scenario: Generating a clean reset threshold for 3.3 V microcontrollers during brown-out conditions. IC Role / Device Role / Timing Role: Functions as voltage-sensing element in discrete reset generator circuits with RC timing. Use Value: Delivers repeatable 2.4 V trip point with ≤50 μA leakage, minimizing standby current in always-on reset supervision. |
| Linear Regulator Shunt Reference | ESD Protection Clamp |
Use Scenario: Stabilizing output of low-current linear regulators (e.g., LDOs driving clock buffers or PLLs). IC Role / Device Role / Timing Role: Provides precision feedback reference for error amplifier in shunt-regulated topology. Use Value: Differential resistance of 275–600 Ω ensures <0.5% load regulation error up to 10 mA output current. | Use Scenario: Clamping transient surges on 3.3 V I²C or UART lines exposed to human-body-model ESD events. IC Role / Device Role / Timing Role: Acts as fast-acting bidirectional clamp (forward VF = 0.9 V, reverse VZ = 2.4 V) to limit voltage excursions. Use Value: Withstands 40 W non-repetitive surge (tp = 100 μs), limiting line voltage to ≤3.3 V during 8 kV contact discharge. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5221BS-7-F | 2.4 V ±5%, SOT-23 package, 225 mW Ptot, rdif = 100 Ω typ. | SMT-only footprint; lower power rating; tighter rdif improves regulation but less surge robustness. | Select for space-constrained PCBs where reflow compatibility and smaller size outweigh through-hole reliability needs. |
| 1N4730A | 3.9 V nominal, ±5%, DO-41 package, 1 W Ptot, rdif = 9 Ω. | Higher voltage and power rating; not interchangeable without circuit redesign. | Choose only if system requires ≥3.9 V reference and can accommodate larger DO-41 footprint and higher thermal mass. |
Compared with MMBZ5221BS-7-F, BZX79-B2V4,143 offers superior surge immunity (40 W vs. 10 W) and hermetic reliability, while 1N4730A provides higher power handling but lacks the precise 2.4 V point and ±2% tolerance needed for low-voltage biasing.
Availability
BZX79-B2V4,143 is available at Aetrix Electronics and suitable for low-voltage sensor biasing, microcontroller reset generation, and linear regulator shunt reference applications requiring stable component supply, long-lifecycle support, and traceable sourcing.
Supply support for BZX79-B2V4,143 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, designed specifically for cost-sensitive, low-power voltage reference and stabilization in general-purpose analog and power management circuits.
FAQ
What is the maximum continuous reverse power this diode can handle?
The BZX79-B2V4,143 has a total power dissipation rating of 500 mW at Tamb = 50 °C with standard PCB mounting (lead length ≤8 mm). This is not a reverse-only rating - it applies to combined forward and reverse power under steady-state conditions. Exceeding this causes irreversible junction overheating.
Can this Zener be used in surface-mount designs?
No - BZX79-B2V4,143 uses an axial-leaded SOD27 (DO-35) glass package intended for through-hole mounting. For SMT equivalents, consider Nexperia's MMBZ52xx series in SOT-23 or PMA3 series in SOD-323, which offer comparable voltage grades but different thermal and mechanical characteristics.
How does temperature affect its Zener voltage accuracy?
At 2.4 V nominal, the BZX79-B2V4,143 exhibits a negative temperature coefficient between −3.5 and −1.6 mV/K. This means its Zener voltage decreases by ~2–3 mV per 1 °C rise in junction temperature, making it suitable for applications where moderate drift is acceptable or compensatable via circuit design.
Is the cathode marked on the device body?
Yes - the cathode is identified by a single distinct color band (typically black or dark gray) near one end of the glass body. This band must be oriented toward the higher-potential node in reverse-bias configurations to ensure proper Zener breakdown and voltage regulation.
BZX79-B2V4,143 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:
- ±2%
- 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-B2V4,143 FAQ
1.How can I place an order for BZX79-B2V4,143 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX79-B2V4,143 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-B2V4,143 reliable?
The price and inventory of BZX79-B2V4,143 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX79-B2V4,143 is usually 5 days.
3.What payment methods are accepted for BZX79-B2V4,143?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX79-B2V4,143 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX79-B2V4,143?
BZX79-B2V4,143 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX79-B2V4,143 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-B2V4,143?
For technical support, including BZX79-B2V4,143 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX79-B2V4,143 requirements.
6.How does Aetrix verify that BZX79-B2V4,143 is sourced from the original manufacturer or authorized distributors?
All BZX79-B2V4,143 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-B2V4,143 meets industry standards.
7.What is the process for return or replacement of BZX79-B2V4,143?
All BZX79-B2V4,143 units undergo pre-shipment inspection (PSI). If there is an issue with BZX79-B2V4,143, 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-B2V4,143 part is unused and in its original packaging.
Return procedure for BZX79-B2V4,143:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX79-B2V4,143 Tags
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MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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MMSZ4682T1G
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
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SMAJ4744A-TP
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BZT52C3V6LP-7
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SMAZ12-13-F
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