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Nexperia USA Inc. BZX79-B5V6,143
- Part No.:
- BZX79-B5V6,143
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
BZX79-B5V6,143.pdf
- Description:
- DIODE ZENER 5.6V 400MW ALF2
- Quantity:
- Payment:
- Shipping:
Inventory:4,958
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Product details
Overview
BZX79-B5V6,143 from Nexperia is a ±2% tolerance Zener voltage regulator diode in a hermetically sealed SOD27 (DO-35) glass package, rated for 5.49 V to 5.71 V nominal Zener voltage at 5 mA test current, 80 Ω typical differential resistance, and −2.0 mV/K to +1.2 mV/K temperature coefficient. It delivers stable low-voltage reference or stabilization in power supply feedback paths, analog sensor biasing, and overvoltage protection circuits.
For engineers reviewing the BZX79-B5V6,143 datasheet, BZX79-B5V6,143 pinout, BZX79-B5V6,143 application, or BZX79-B5V6,143 equivalent, this part serves as a precision 5.6 V reference with low dynamic impedance, tight tolerance, and proven thermal stability across industrial temperature ranges - critical for voltage monitoring, ADC reference buffering, and regulated standby rail generation.
Technical Context
The BZX79-B5V6,143 operates as a two-terminal reverse-biased Zener diode, entering controlled breakdown at its specified nominal voltage under defined test current (IZ = 5 mA). Its junction design achieves low differential resistance (80 Ω typ.) and a near-zero temperature coefficient crossing point around 5.6 V, enabling stable regulation without external compensation.
It adheres to IEC 60134 absolute maximum ratings, with 500 mW total power dissipation at Tamb = 50 °C (lead length ≤ 8 mm), 40 W non-repetitive peak reverse power capability (tp = 100 μs), and junction temperature limits from −65 °C to +200 °C - supporting reliable operation in unregulated DC/DC feedback loops and transient clamp applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 5.49 V to 5.71 V at IZ = 5 mA - defines precise regulation threshold for feedback or clamping |
| Differential Resistance (rdif) | 80 Ω typical at IZ = 5 mA - ensures minimal output voltage shift under load variation |
| Temperature Coefficient (SZ) | −2.0 mV/K to +1.2 mV/K at IZ = 5 mA - enables stable reference performance across −65 °C to +150 °C |
| Reverse Current (IR) | 1 μA max. at VR = 2 V - guarantees low leakage in high-impedance reference nodes |
| Total Power Dissipation (Ptot) | 500 mW at Tamb = 50 °C - supports continuous operation in compact PCB layouts without forced cooling |
| Package | SOD27 (DO-35) - axial-leaded hermetic glass package with cathode band marking, compatible with through-hole reflow and wave soldering |
| Junction-to-Ambient Rth | 380 K/W - informs thermal design margin for ambient temperatures up to 50 °C |
Pinout & Package
SOD27 (DO-35) is a hermetically sealed axial-leaded glass package with cathode identified by a colored band. The device has two terminals: anode and cathode - no internal circuitry or polarity-sensitive control logic.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener breakdown return path | Connected to lower-potential node in reverse-bias configuration; carries forward current up to 250 mA |
| Cathode | Zener breakdown terminal / voltage reference output | Marked with band; referenced to system ground or feedback node; holds regulated voltage during reverse conduction |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance | Enables accurate voltage setting without post-production trimming in precision references |
| Low differential resistance (80 Ω typ.) | Maintains regulation accuracy under varying load currents in feedback networks |
| Hermetic SOD27 glass package | Ensures long-term parameter stability and moisture resistance in harsh environments |
| Non-repetitive peak power rating (40 W) | Provides robust transient overvoltage clamping capability in surge-prone inputs |
| Wide operating junction temperature range | Supports deployment in automotive under-hood and industrial control enclosures without derating |
Applications
| Power Supply Feedback Reference | Sensor Biasing Network |
|---|---|
Use Scenario: Used in the optocoupler feedback loop of isolated AC/DC adapters to regulate +5 V or +3.3 V output rails. IC Role / Device Role / Timing Role: Zener diode provides stable 5.6 V reference to TL431 shunt regulator input, enabling precise error amplification. Use Value: Tight ±2% tolerance and low rdif ensure <±1% output voltage drift across line/load/temperature variations. | Use Scenario: Supplies bias voltage to analog temperature sensors (e.g., LM35) in HVAC control units. IC Role / Device Role / Timing Role: Acts as low-noise, low-drift voltage reference for sensor excitation, replacing higher-cost IC references. Use Value: −2.0 to +1.2 mV/K SZ minimizes sensor offset drift over −40 °C to +85 °C operating range. |
| Overvoltage Clamp Circuit | ADC Reference Buffer |
Use Scenario: Placed across microcontroller I/O pins to limit transient spikes from relay coils or ESD events. IC Role / Device Role / Timing Role: Two-terminal passive clamp that conducts above 5.6 V, diverting surge current to ground. Use Value: 40 W non-repetitive peak power rating absorbs 100 μs surges without degradation, protecting 3.3 V logic. | Use Scenario: Provides stable 5.6 V reference to SAR ADCs (e.g., ADS7822) in data acquisition modules. IC Role / Device Role / Timing Role: Low-impedance Zener source buffers reference input, reducing noise coupling and settling time. Use Value: 80 Ω rdif ensures <1 LSB error contribution under 100 µA reference load variations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5232B,215 | Same 5.6 V nominal, ±5% tolerance, SOT-23 package, 200 mW Ptot | Surface-mount only; lower power rating requires derating above 70 °C ambient | Select for space-constrained PCBs where thermal management allows reduced power handling |
| 1N4734A | 5.6 V nominal, ±5% tolerance, DO-41 package, 1 W Ptot, higher rdif (~10 Ω min.) | Higher power dissipation but looser tolerance and larger footprint | Select when >500 mW continuous dissipation is required and ±5% regulation accuracy is acceptable |
Compared with MMBZ5232B,215, BZX79-B5V6,143 offers tighter ±2% tolerance and higher 500 mW power rating in a through-hole package; compared with 1N4734A, it provides superior voltage accuracy and smaller DO-35 form factor, albeit with lower absolute power handling.
Availability
BZX79-B5V6,143 is available at Aetrix Electronics and suitable for power supply feedback reference, sensor biasing network, and overvoltage clamp circuit applications requiring stable component supply, long-lifecycle support, and traceable sourcing.
Supply support for BZX79-B5V6,143 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, computing, and consumer markets.
The BZX79 series belongs to Nexperia's legacy Zener diode portfolio, designed specifically for low-power voltage regulation and reference applications where precision, reliability, and hermetic packaging are essential.
FAQ
What is the maximum continuous reverse current the BZX79-B5V6,143 can sustain at 25 °C?
The BZX79-B5V6,143 does not specify a maximum continuous reverse current (IZ) - instead, its safe operating area is defined by power dissipation limits. At 25 °C ambient, with proper PCB thermal design (Rth j-a = 380 K/W), it supports up to ~5 mA continuous Zener current before reaching 500 mW dissipation. Higher currents require derating per thermal resistance curves in the datasheet.
Can the BZX79-B5V6,143 be used in surface-mount designs?
No - the BZX79-B5V6,143 uses the axial-leaded SOD27 (DO-35) through-hole package and is not compatible with standard SMT assembly processes. For surface-mount equivalents, consider Nexperia's MMBZ5232B (SOT-23) or PZM5.6NB (SOT-323), which share the same 5.6 V rating but differ in tolerance and power rating.
How does the temperature coefficient affect regulation accuracy over temperature?
The BZX79-B5V6,143 exhibits a temperature coefficient ranging from −2.0 mV/K to +1.2 mV/K at 5 mA. Over a −40 °C to +125 °C range, this contributes up to ±200 mV drift - approximately ±3.6% of nominal 5.6 V. For high-accuracy systems, this must be accounted for in calibration or compensated via circuit topology.
Is the cathode marked on the BZX79-B5V6,143 package?
Yes - the cathode is clearly marked by a distinct color band (typically black or dark stripe) on the glass body of the SOD27 (DO-35) package. This band aligns with the cathode terminal and must be oriented toward the higher-potential node in reverse-bias Zener operation.
BZX79-B5V6,143 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):
- 5.6 V
- Tolerance:
- ±2%
- Power - Max:
- 400 mW
- Impedance (Max) (Zzt):
- 40 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 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-B5V6,143 FAQ
1.How can I place an order for BZX79-B5V6,143 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX79-B5V6,143 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-B5V6,143 reliable?
The price and inventory of BZX79-B5V6,143 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX79-B5V6,143 is usually 5 days.
3.What payment methods are accepted for BZX79-B5V6,143?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX79-B5V6,143 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX79-B5V6,143?
BZX79-B5V6,143 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX79-B5V6,143 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-B5V6,143?
For technical support, including BZX79-B5V6,143 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX79-B5V6,143 requirements.
6.How does Aetrix verify that BZX79-B5V6,143 is sourced from the original manufacturer or authorized distributors?
All BZX79-B5V6,143 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-B5V6,143 meets industry standards.
7.What is the process for return or replacement of BZX79-B5V6,143?
All BZX79-B5V6,143 units undergo pre-shipment inspection (PSI). If there is an issue with BZX79-B5V6,143, 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-B5V6,143 part is unused and in its original packaging.
Return procedure for BZX79-B5V6,143:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX79-B5V6,143 Tags
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