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Nexperia USA Inc. BZX79-B16,143
- Part No.:
- BZX79-B16,143
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
BZX79-B16,143.pdf
- Description:
- DIODE ZENER 16V 400MW ALF2
- Quantity:
- Payment:
- Shipping:
Inventory:8,977
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Product details
Overview
BZX79-B16,143 from Nexperia is a ±2% tolerance Zener voltage regulator diode with nominal 16 V breakdown voltage at 5 mA test current, 50 Ω typical differential resistance, and −65 °C to +200 °C junction temperature range. It operates as a low-power voltage reference in bias networks, feedback loops, and overvoltage protection circuits for industrial power supplies and sensor signal conditioning.
For engineers reviewing the BZX79-B16,143 datasheet, BZX79-B16,143 pinout, BZX79-B16,143 application, or BZX79-B16,143 equivalent, key selection criteria include Zener voltage tolerance (±2%), 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 device functions as a two-terminal silicon Zener diode operating in reverse breakdown mode. Its voltage regulation relies on controlled avalanche and Zener mechanisms, with temperature coefficient of +10.4 mV/K at 5 mA, indicating positive drift above ~6.2 V nominal Zener voltage.
The SOD27 (DO-35) hermetically sealed glass package enables stable long-term voltage reference performance under ambient temperatures from −65 °C to +150 °C, with thermal resistance from junction to ambient rated at 380 K/W under standard PCB mounting conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 15.7 V to 16.3 V at IZ = 5 mA - ensures tight regulation for precision reference applications |
| Differential Resistance (rdiff) | 50 Ω max at IZ = 5 mA - determines output impedance and load regulation sensitivity |
| Temperature Coefficient (SZ) | +10.4 mV/K typical at IZ = 5 mA - quantifies voltage drift per degree Celsius rise |
| Total Power Dissipation (Ptot) | 500 mW at Tamb = 50 °C - defines maximum continuous DC power handling capability |
| Non-repetitive Peak Reverse Power (PZSM) | 40 W at tp = 100 μs - supports transient overvoltage clamping without failure |
| Reverse Current (IR) | 50 nA max at VR = 11.2 V - confirms low leakage below breakdown threshold |
| Junction Temperature Range (Tj) | −65 °C to +200 °C - validates operation in extended industrial and automotive environments |
Pinout & Package
Hermetically sealed axial-leaded SOD27 (DO-35) glass package with cathode band marking; 2-terminal device requiring no external biasing or control signals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-side connection | Connected to circuit ground or lower potential node during Zener operation |
| Cathode | Reverse breakdown terminal / high-side connection | Connected to regulated voltage node; marked by colored band on glass body |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance | Enables precise voltage referencing without post-manufacturing trimming |
| 500 mW total power dissipation | Supports stable DC regulation in space-constrained linear power stages |
| 40 W non-repetitive peak reverse power | Provides robust transient suppression for ESD and inductive switching events |
| DO-35 glass package with hermetic seal | Ensures long-term parameter stability and moisture resistance in harsh environments |
| −65 °C to +200 °C storage temperature range | Validates suitability for reflow soldering, automotive under-hood, and industrial control use |
Applications
| Power Supply Reference | Sensor Bias Network |
|---|---|
|
Use Scenario: Stabilizing feedback voltage in 16 V linear regulator output stage. IC Role / Device Role / Timing Role: Two-terminal Zener reference providing fixed 16 V reference point for error amplifier comparison. Use Value: Maintains ±0.3 V output accuracy across load and line variations due to 50 Ω dynamic impedance. |
Use Scenario: Providing stable excitation voltage to resistive temperature detector (RTD) bridge. IC Role / Device Role / Timing Role: Low-noise, low-drift voltage source for precision analog front-end biasing. Use Value: Enables <10 ppm/°C system-level temperature measurement error via +10.4 mV/K coefficient compensation. |
| Overvoltage Clamp | Signal Level Shifter |
|
Use Scenario: Protecting microcontroller GPIO input against 24 V transients in industrial PLC I/O module. IC Role / Device Role / Timing Role: Fast-acting shunt clamp limiting input voltage to 16.3 V maximum. Use Value: Absorbs 40 W surge energy within 100 μs without degradation, preventing latch-up or gate oxide damage. |
Use Scenario: Translating 3.3 V logic signal to 16 V level for driving optocoupler LED in isolated feedback path. IC Role / Device Role / Timing Role: Passive level translator using forward-biased anode and Zener-clamped cathode. Use Value: Achieves clean 16 V high-state with <50 nA leakage, minimizing standby current in always-on monitoring circuits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5245B (ON Semiconductor) | Same 16 V nominal Zener, SOT-23 package, 225 mW Ptot, higher rdiff (20 Ω typ) | Surface-mount only; unsuitable for through-hole legacy designs or high-surge scenarios | Select when board space is constrained and surge immunity requirements are ≤10 W |
| 1N4744A (ON Semiconductor) | 14 V nominal Zener, DO-41 package, 1 W Ptot, ±5% tolerance, 16 Ω rdiff | Higher power rating but looser voltage tolerance and different regulation point | Select only if 14 V reference is acceptable and 1 W continuous dissipation is required |
Compared with MMBZ5245B and 1N4744A, BZX79-B16,143 offers tighter ±2% tolerance and superior surge capability (40 W vs. ≤10 W), making it preferred for precision reference and transient-critical through-hole applications where DO-35 footprint is mandated.
Availability
BZX79-B16,143 is available at Aetrix Electronics and suitable for industrial power supplies, sensor interface modules, and PLC I/O protection circuits requiring stable component supply and long-lifecycle support.
Supply support for BZX79-B16,143 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 focus on automotive, industrial, and computing markets.
BZX79-B16,143 belongs to the BZX79 series of low-power Zener diodes designed specifically for precision voltage reference and stabilization in cost-sensitive, high-reliability through-hole applications.
FAQ
What is the maximum continuous reverse power dissipation for BZX79-B16,143?
The maximum continuous reverse power dissipation is 500 mW at ambient temperature of 50 °C with standard PCB mounting (lead length ≤8 mm). Derating is required above 50 °C at 4.2 mW/°C based on thermal resistance of 380 K/W.
Does BZX79-B16,143 have a specified forward voltage?
Yes - forward voltage is 0.9 V maximum at 10 mA forward current and 25 °C junction temperature. This value is relevant for applications using the diode in forward conduction mode, such as level shifting or polarity protection.
Can BZX79-B16,143 be used in surface-mount designs?
No - BZX79-B16,143 uses the axial-leaded SOD27 (DO-35) glass package and is not compatible with SMT reflow processes. For surface-mount equivalents, consider MMBZ5245B (SOT-23) or BZX84-C16 (SOT-23), which differ in tolerance, power rating, and thermal performance.
What is the reverse leakage current specification at 11.2 V?
At VR = 11.2 V (0.7 × VZnom = 0.7 × 16 V), reverse leakage current is guaranteed ≤50 nA. This low leakage ensures minimal error contribution in high-impedance reference nodes and battery-powered systems.
BZX79-B16,143 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, Axial
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 16 V
- Tolerance:
- ±2%
- Power - Max:
- 400 mW
- Impedance (Max) (Zzt):
- 40 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 11.2 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-B16,143 FAQ
1.How can I place an order for BZX79-B16,143 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX79-B16,143 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-B16,143 reliable?
The price and inventory of BZX79-B16,143 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX79-B16,143 is usually 5 days.
3.What payment methods are accepted for BZX79-B16,143?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX79-B16,143 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX79-B16,143?
BZX79-B16,143 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX79-B16,143 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-B16,143?
For technical support, including BZX79-B16,143 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX79-B16,143 requirements.
6.How does Aetrix verify that BZX79-B16,143 is sourced from the original manufacturer or authorized distributors?
All BZX79-B16,143 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-B16,143 meets industry standards.
7.What is the process for return or replacement of BZX79-B16,143?
All BZX79-B16,143 units undergo pre-shipment inspection (PSI). If there is an issue with BZX79-B16,143, 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-B16,143 part is unused and in its original packaging.
Return procedure for BZX79-B16,143:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX79-B16,143 Tags
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