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Nexperia USA Inc. BZX79-B62,143
- Part No.:
- BZX79-B62,143
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
BZX79-B62,143.pdf
- Description:
- DIODE ZENER 62V 400MW ALF2
- Quantity:
- Payment:
- Shipping:
Inventory:4,861
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Product details
Overview
BZX79-B62,143 from Nexperia is a ±2% tolerance Zener voltage regulator diode with nominal working voltage 62 V, 120 Ω typical differential resistance at 2 mA, and −50 nA maximum reverse current at VR = 0.7 × VZnom (43.4 V). It operates as a low-power voltage reference in biasing, regulation, and overvoltage protection circuits, rated for 500 mW total power dissipation at Tamb = 50 °C.
For engineers reviewing the BZX79-B62,143 datasheet, BZX79-B62,143 pinout, BZX79-B62,143 application, or BZX79-B62,143 equivalent, this device serves as a precision voltage reference in analog front-ends, power supply feedback loops, and sensor excitation circuits where stable 62 V clamping and low temperature coefficient are required.
Technical Context
This Zener diode functions in reverse-biased breakdown mode, delivering stable voltage regulation via avalanche mechanism above ~6 V. Its 62 V nominal Zener voltage is specified at IZtest = 2 mA, with 80 mV/K typical temperature coefficient and 35 pF junction capacitance at 1 MHz and VR = 0 V.
The device uses a hermetically sealed SOD27 (DO-35) glass package with axial leads, optimized for low leakage and long-term stability. Thermal resistance from junction to ambient is 380 K/W under standard PCB mounting conditions, limiting continuous power handling without heatsinking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 60.8 V to 63.2 V at IZ = 2 mA - defines precise clamping threshold for overvoltage protection |
| Differential Resistance (rdif) | 120 Ω typical at IZ = 2 mA - determines output impedance and regulation sensitivity to current variation |
| Reverse Current (IR) | ≤50 nA at VR = 43.4 V (0.7 × VZnom) - ensures minimal standby leakage in high-impedance reference nodes |
| Total Power Dissipation (Ptot) | 500 mW at Tamb = 50 °C - sets maximum continuous DC power handling on standard PCB layout |
| Non-repetitive Peak Power (PZSM) | 40 W for tp = 100 μs - supports transient surge suppression in input protection stages |
| Junction-to-Ambient Rth | 380 K/W - defines thermal rise per watt; requires derating above 50 °C ambient |
Pinout & Package
Hermetically sealed axial-leaded SOD27 (DO-35) glass package with cathode indicated by a 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 | Connected to ground or lower potential node in shunt regulator configuration |
| Cathode | Zener breakdown terminal / high-side connection | Marked with band; connected to input rail or regulated node requiring 62 V reference |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance | Enables tight regulation without post-production trimming in precision reference designs |
| Low temperature coefficient | −50 nA IR at 43.4 V and 80 mV/K SZ ensure stable 62 V output across −65 °C to +150 °C operating range |
| Hermetic SOD27 packaging | Prevents moisture ingress and parameter drift over time, supporting >10-year reliability in industrial environments |
| 40 W non-repetitive peak power | Allows single-event transient suppression up to 40 W for 100 μs without degradation |
Applications
| Industrial Sensor Excitation | Power Supply Feedback Reference |
|---|---|
Use Scenario: Providing stable excitation voltage to resistive bridge sensors in PLC analog input modules. IC Role / Device Role / Timing Role: Shunt Zener reference establishing fixed 62 V bias point for Wheatstone bridge operation. Use Value: Enables <±0.1% full-scale error over temperature due to low IR and predictable rdif. | Use Scenario: Setting upper regulation threshold in isolated flyback converter feedback network. IC Role / Device Role / Timing Role: Precision voltage clamp defining optocoupler LED drive threshold for secondary-side regulation. Use Value: Maintains ±2% output voltage accuracy across line/load transients and 10-year field life. |
| Overvoltage Protection Clamp | ADC Reference Stabilization |
Use Scenario: Protecting microcontroller I/O pins from 60–65 V surges in automotive body control modules. IC Role / Device Role / Timing Role: Fast-acting shunt clamp diverting excess energy during load dump events. Use Value: Limits transient voltage to ≤63.2 V with 40 W peak power absorption capability. | Use Scenario: Stabilizing reference voltage for 16-bit SAR ADC in test equipment front-end. IC Role / Device Role / Timing Role: Low-noise, low-drift Zener source replacing buffered bandgap for improved INL performance. Use Value: Delivers <10 ppm/°C effective TC and <50 nA leakage to minimize reference error contribution. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5259B,215 | Surface-mount SOT-23 package; 62 V ±5%; 100 Ω rdif at 20 mA; higher IR (100 nA @ 43.4 V) | Designed for space-constrained PCB layouts; less suitable for high-reliability through-hole assemblies | Select when board area is critical and ±5% tolerance acceptable |
| 1N4742A | Through-hole DO-41; 62 V ±5%; 150 Ω rdif at 20 mA; 100 nA IR @ 43.4 V; Ptot = 1 W | Higher power rating but looser tolerance and higher leakage limit precision use cases | Select only if 1 W continuous dissipation is required and ±2% not mandatory |
Compared with MMBZ5259B,215 and 1N4742A, BZX79-B62,143 offers tighter ±2% tolerance, lower leakage, and hermetic glass construction-making it preferred for long-life industrial references where stability outweighs package size or power headroom.
Availability
BZX79-B62,143 is available at Aetrix Electronics and suitable for industrial sensor excitation, power supply feedback reference, and overvoltage protection clamp applications requiring stable component supply and long-term parametric consistency.
Supply support for BZX79-B62,143 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, formed in 2017 from the former NXP Standard Products business, with focus on automotive, industrial, computing, and consumer markets.
The BZX79 series belongs to Nexperia's legacy Zener diode product line, engineered specifically for low-power voltage regulation and reference applications demanding high stability, hermetic reliability, and E24-standardized voltage values.
FAQ
What is the maximum continuous reverse voltage that BZX79-B62,143 can regulate without exceeding its power limit?
At Tamb = 50 °C, BZX79-B62,143 sustains 500 mW dissipation. With nominal VZ = 62 V, the maximum continuous Zener current is 8.06 mA (500 mW ÷ 62 V). Exceeding this current risks thermal runaway due to its positive temperature coefficient above ~6 V, so design must include series resistance to limit IZ within this bound.
How does the 62 V Zener voltage tolerance affect circuit accuracy in a feedback loop?
The ±2% tolerance (60.8 V to 63.2 V) directly sets the absolute accuracy window of the regulated output. In a flyback converter using this diode in an optocoupler feedback divider, it contributes ±2% systematic error to the final output voltage-requiring compensation in resistor selection or calibration if sub-1% system accuracy is needed.
Can BZX79-B62,143 be used in place of a 62 V TVS diode for surge protection?
No-it is not rated for repetitive surge events. While it handles 40 W non-repetitive pulses (100 μs), its 500 mW continuous rating and lack of defined clamping voltage (Vc) or peak pulse current (Ipp) make it unsuitable as a primary TVS. Use dedicated TVS devices like P6KE62CA for surge immunity; BZX79-B62,143 is intended for steady-state regulation only.
Why does the datasheet specify reverse current at VR = 0.7 × VZnom instead of VR = VZ?
This condition (VR = 43.4 V) tests leakage well below breakdown, revealing early-stage junction defects and long-term stability risk. Measuring IR at VZ would yield uncontrolled avalanche current; using 70% of VZ ensures measurement occurs in the pre-breakdown region where leakage is thermally activated and predictive of parametric drift over time.
BZX79-B62,143 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):
- 62 V
- Tolerance:
- ±2%
- Power - Max:
- 400 mW
- Impedance (Max) (Zzt):
- 215 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 43.4 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-B62,143 FAQ
1.How can I place an order for BZX79-B62,143 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX79-B62,143 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-B62,143 reliable?
The price and inventory of BZX79-B62,143 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX79-B62,143 is usually 5 days.
3.What payment methods are accepted for BZX79-B62,143?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX79-B62,143 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX79-B62,143?
BZX79-B62,143 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX79-B62,143 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-B62,143?
For technical support, including BZX79-B62,143 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX79-B62,143 requirements.
6.How does Aetrix verify that BZX79-B62,143 is sourced from the original manufacturer or authorized distributors?
All BZX79-B62,143 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-B62,143 meets industry standards.
7.What is the process for return or replacement of BZX79-B62,143?
All BZX79-B62,143 units undergo pre-shipment inspection (PSI). If there is an issue with BZX79-B62,143, 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-B62,143 part is unused and in its original packaging.
Return procedure for BZX79-B62,143:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX79-B62,143 Tags
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