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Nexperia USA Inc. BZX79-B13,143
- Part No.:
- BZX79-B13,143
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
BZX79-B13,143.pdf
- Description:
- DIODE ZENER 13V 400MW ALF2
- Quantity:
- Payment:
- Shipping:
Inventory:4,871
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Product details
Overview
BZX79-B13,143 from Nexperia is a ±2% tolerance Zener voltage regulator diode with nominal 13 V breakdown voltage at 5 mA test current, 50 Ω typical differential resistance, and 7 mV/K temperature coefficient. It operates as a low-power voltage reference in biasing, regulation, and overvoltage protection circuits, rated for 500 mW total power dissipation at 50 °C ambient and housed in hermetically sealed SOD27 (DO-35) glass package.
For engineers reviewing the BZX79-B13,143 datasheet, BZX79-B13,143 pinout, BZX79-B13,143 application, or BZX79-B13,143 equivalent, this page delivers verified electrical parameters, thermal behavior, cathode-marked axial lead configuration, and direct substitution guidance for precision 13 V reference designs requiring stable low-current regulation.
Technical Context
This Zener diode functions in reverse-biased avalanche mode to maintain a stable 12.7–13.3 V reference across load variations. Its 50 Ω typical dynamic impedance ensures minimal output voltage shift under 1–10 mA operating currents, while its +7 mV/K temperature coefficient enables predictable drift compensation in temperature-sensitive references.
The device uses a hermetically sealed glass SOD27 package with axial leads and cathode band marking, supporting manual or wave soldering. Thermal resistance from junction to ambient is 380 K/W (unmounted), limiting continuous operation to ≤500 mW at Tamb = 50 °C per IEC 60134 absolute maximum ratings.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage (VZ) | 12.7–13.3 V at IZ = 5 mA - defines tight regulation window for precision reference use |
| Differential Resistance (rdif) | 50 Ω typ. at IZ = 5 mA - determines output voltage stability under load current changes |
| Temperature Coefficient (SZ) | +7.0 mV/K typ. at IZ = 5 mA - quantifies voltage drift per degree Celsius for thermal design margining |
| Total Power Dissipation (Ptot) | 500 mW at Tamb = 50 °C - sets maximum continuous DC power handling without heatsinking |
| Reverse Current (IR) | 100 nA max. at VR = 8 V - ensures low leakage in high-impedance reference nodes |
| Non-repetitive Peak Power (PZSM) | 40 W at tp = 100 μs - supports transient overvoltage clamping in surge protection |
Pinout & Package
Hermetically sealed axial-leaded SOD27 (DO-35) glass package with cathode identified by a colored band on the body. Leads are tinned copper-clad steel, suitable for manual or wave soldering. Package dimensions: D = 1.85 mm max., L = 25.4 mm min., b = 0.56 mm max.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-impedance path during forward bias | Connected to lower-potential node in Zener reference circuits; carries up to 250 mA forward current |
| Cathode | Regulated output terminal / avalanche breakdown node | Marked with band; connected to regulated voltage rail; sinks reverse current to maintain VZ |
Key Features
| Feature | Design Value |
|---|---|
| ±2% VZ tolerance | Enables single-supply 13 V reference accuracy without post-calibration in industrial sensor interfaces |
| 500 mW power rating | Supports direct replacement of legacy ½-W Zeners in space-constrained PCB layouts |
| Hermetic glass SOD27 package | Ensures long-term parameter stability and moisture resistance in automotive under-hood environments |
| +7 mV/K tempco | Allows predictable thermal drift modeling for compensated voltage references in wide-temperature-range applications |
Applications
| Power Supply Reference | Sensor Biasing |
|---|---|
Use Scenario: Providing stable 13 V reference for op-amp feedback networks in linear regulators. IC Role / Device Role / Timing Role: Zener diode acting as shunt voltage reference in series-pass regulator topology. Use Value: 12.7–13.3 V tolerance and 50 Ω dynamic impedance ensure <±15 mV output variation across 1–5 mA load current range. | Use Scenario: Biasing bridge-based pressure sensors requiring precise excitation voltage. IC Role / Device Role / Timing Role: Low-drift voltage reference source for Wheatstone bridge excitation. Use Value: +7 mV/K tempco enables predictable offset correction when paired with NTC thermistors in analog front-ends. |
| Overvoltage Clamp | Microcontroller Reset Circuit |
Use Scenario: Protecting 12 V automotive MCU inputs against load-dump transients. IC Role / Device Role / Timing Role: Shunt clamping element diverting surge energy above 13 V threshold. Use Value: 40 W non-repetitive peak power rating handles 100 μs surges without degradation, per ISO 7637-2 Pulse 1/2a. | Use Scenario: Generating clean reset signal for 3.3 V microcontrollers using resistor-divider + Zener clamp. IC Role / Device Role / Timing Role: Precision voltage threshold detector in RC-based power-on reset generator. Use Value: 100 nA max. reverse leakage at 8 V prevents capacitor discharge errors, ensuring reliable reset timing over temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5242B,115 | Same 13 V nominal VZ, but SOT-23 package; 100 mW Ptot; higher rdif (200 Ω typ.) | Surface-mount only; unsuitable for through-hole prototyping or high-surge scenarios | Select for space-constrained PCBs where 500 mW rating is unnecessary |
| 1N4742A | 12 V nominal VZ; ±5% tolerance; 1 W Ptot; DO-41 package; 9 Ω rdif | Lower voltage grade; looser tolerance; higher power capability; larger footprint | Select when 12 V reference suffices and higher surge robustness or lower impedance is required |
Compared with MMBZ5242B,115, BZX79-B13,143 offers 5× higher power rating and ¼ the dynamic impedance for improved regulation fidelity; versus 1N4742A, it provides tighter ±2% tolerance and optimized thermal response for precision analog circuits despite lower absolute power.
Availability
BZX79-B13,143 is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive ECU reference circuits, and embedded power supply stabilization requiring stable component supply and long-lifecycle support.
Supply support for BZX79-B13,143 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-reliability components engineered for performance and longevity.
The BZX79 series belongs to Nexperia's standard Zener diode product line, designed specifically for low-power voltage regulation and precision reference applications where stability, tight tolerance, and hermetic reliability are critical.
FAQ
What is the maximum continuous reverse current the BZX79-B13,143 can sustain at 25 °C?
The device has no specified maximum continuous reverse current limit; instead, it is constrained by power dissipation. At 25 °C ambient, the 500 mW rating allows up to ~38.5 mA reverse current (500 mW ÷ 13 V), but derating applies above 50 °C per the Rth j-a = 380 K/W thermal resistance specification.
Does the BZX79-B13,143 have a specified Zener impedance at 1 mA test current?
No - the datasheet specifies differential resistance (rdif) only at IZ = 5 mA (50 Ω typ.). At 1 mA, rdif increases significantly; Fig.5 shows typical values exceeding 150 Ω for 13 V Zeners in the BZX79-B series due to reduced avalanche carrier density.
Can the BZX79-B13,143 be used in parallel for higher power handling?
No - Zener diodes exhibit negative temperature coefficients below ~5 V and positive above, but even within the same series, minor VZ mismatches cause current hogging. Parallel operation is not recommended; use a single higher-rated device like 1N4742A (1 W) instead.
Is the cathode band polarity consistent across all SOD27-packaged Nexperia Zeners?
Yes - all SOD27 devices in the BZX79 series, including BZX79-B13,143, mark the cathode with a distinct colored band near one lead end. This matches JEDEC DO-35 standard orientation and ensures unambiguous PCB layout and assembly verification.
BZX79-B13,143 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):
- 13 V
- Tolerance:
- ±2%
- Power - Max:
- 400 mW
- Impedance (Max) (Zzt):
- 30 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 8 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-B13,143 FAQ
1.How can I place an order for BZX79-B13,143 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX79-B13,143 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-B13,143 reliable?
The price and inventory of BZX79-B13,143 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX79-B13,143 is usually 5 days.
3.What payment methods are accepted for BZX79-B13,143?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX79-B13,143 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX79-B13,143?
BZX79-B13,143 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX79-B13,143 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-B13,143?
For technical support, including BZX79-B13,143 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX79-B13,143 requirements.
6.How does Aetrix verify that BZX79-B13,143 is sourced from the original manufacturer or authorized distributors?
All BZX79-B13,143 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-B13,143 meets industry standards.
7.What is the process for return or replacement of BZX79-B13,143?
All BZX79-B13,143 units undergo pre-shipment inspection (PSI). If there is an issue with BZX79-B13,143, 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-B13,143 part is unused and in its original packaging.
Return procedure for BZX79-B13,143:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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