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Nexperia USA Inc. BZX79-C2V7,143
- Part No.:
- BZX79-C2V7,143
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
BZX79-C2V7,143.pdf
- Description:
- DIODE ZENER 2.7V 400MW ALF2
- Quantity:
- Payment:
- Shipping:
Inventory:3,787
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Product details
Overview
BZX79-C2V7,143 from Nexperia is a 2.7 V ±5% tolerance Zener voltage regulator diode in a hermetically sealed SOD27 (DO-35) glass package, rated for 500 mW total power dissipation at 50 °C ambient, with 20 μA reverse current at 1 V and 75 Ω typical differential resistance at 5 mA test current - used as a low-voltage reference in power supply feedback loops and sensor bias networks.
For engineers reviewing the BZX79-C2V7,143 datasheet, BZX79-C2V7,143 pinout, BZX79-C2V7,143 application, or BZX79-C2V7,143 equivalent, this page delivers verified electrical parameters, thermal behavior, junction-to-ambient thermal resistance, temperature coefficient profile, and validated alternative parts for precision analog reference design.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable voltage under varying load and temperature conditions. Its −2.0 mV/K temperature coefficient at 5 mA enables predictable drift compensation in low-power references, while its 450 pF capacitance at 0 V and 1 MHz supports minimal signal coupling in DC-biased circuits.
The device uses axial-leaded SOD27 packaging with cathode band marking, optimized for through-hole mounting on PCBs without metallization pads. Thermal resistance is 380 K/W junction-to-ambient (lead length ≤ 8 mm), limiting continuous operation to 400 mW at 50 °C ambient per derating curve.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage (VZ) | 2.7 V nominal, 2.5–2.9 V range at IZ = 5 mA - defines stable regulation point for low-voltage biasing |
| Reverse Current (IR) | 20 μA max at VR = 1 V - ensures low leakage in high-impedance reference nodes |
| Differential Resistance (rdif) | 75 Ω typ., 600 Ω max at IZ = 5 mA - determines output impedance and load regulation sensitivity |
| Temperature Coefficient (SZ) | −2.0 mV/K typ. at IZ = 5 mA - quantifies voltage drift per degree Celsius for thermal stability analysis |
| Total Power Dissipation (Ptot) | 500 mW max at Tamb = 50 °C - sets maximum continuous power handling before thermal shutdown risk |
| Non-repetitive Peak Power (PZSM) | 40 W max for 100 μs square wave - supports transient overvoltage clamping in surge protection |
| Diode Capacitance (Cd) | 450 pF max at f = 1 MHz, VR = 0 V - impacts high-frequency noise coupling in precision analog paths |
Pinout & Package
Hermetically sealed axial-leaded SOD27 (DO-35) glass package with cathode indicated by a colored band; leads are tinned copper alloy, suitable for wave or hand soldering per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-side connection in reverse-biased Zener configuration | Connected to ground or lower potential node when used as shunt regulator |
| Cathode | Reverse breakdown terminal / voltage reference output node | Marked with band; connects to regulated voltage rail or feedback divider tap |
Key Features
| Feature | Design Value |
|---|---|
| ±5% voltage tolerance | Enables cost-effective selection for non-critical reference applications without trimming circuitry |
| 500 mW power rating | Supports stable operation in compact through-hole designs without heatsinking |
| −2.0 mV/K tempco | Allows predictable voltage shift across −65 °C to +200 °C operating range for thermal modeling |
| 40 W non-repetitive peak power | Provides transient overvoltage suppression capability in low-energy surge events |
| SOD27 (DO-35) package | Ensures hermetic sealing and long-term reliability in humid or corrosive environments |
Applications
| Power Supply Feedback Reference | Sensor Bias Network |
|---|---|
Use Scenario: Used in TL431-based adjustable linear regulators to set output voltage via resistive divider. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 2.7 V node for error amplifier comparison. Use Value: Enables accurate output regulation within ±1% over temperature due to stable VZ and low rdif. | Use Scenario: Supplies bias current to silicon photodiodes in optical smoke detectors. IC Role / Device Role / Timing Role: Low-drift voltage source establishing fixed reverse bias across photodiode junction. Use Value: Maintains consistent photocurrent response across −25 °C to +70 °C with <0.5% VZ variation. |
| Microcontroller Reset Circuit | Low-Power Analog Front-End |
Use Scenario: Generates clean reset threshold for 3.3 V microcontrollers using RC delay and Zener clamp. IC Role / Device Role / Timing Role: Precision voltage clamp defining logic-high reset release level. Use Value: Prevents false resets during brown-out by holding threshold at 2.7 V ±0.15 V over full industrial temperature range. | Use Scenario: Sets reference voltage for op-amp based instrumentation amplifier gain stage. IC Role / Device Role / Timing Role: Stable DC reference node for offset calibration and common-mode setting. Use Value: Reduces gain error drift to <0.02%/°C by minimizing tempco-induced reference shift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4728A | 3.3 V nominal, ±5% tolerance, 1.0 Ω higher rdif, 100 nA IR at 1 V | Higher VZ shifts reference point; unsuitable where 2.7 V is required for logic-level compatibility | Select only if system allows 3.3 V reference and tighter rdif is not critical |
| BZX55-C2V7 | Same VZ and tolerance, but 1.2 W Ptot, TO-92 package, 100 Ω rdif typ. | Larger package increases board area; higher power rating unnecessary for low-current references | Prefer BZX79-C2V7,143 for space-constrained designs requiring DO-35 footprint and lower rdif |
Compared with 1N4728A and BZX55-C2V7, BZX79-C2V7,143 offers optimal balance of low differential resistance, compact SOD27 form factor, and −2.0 mV/K temperature coefficient - making it preferred for precision 2.7 V references in space- and thermal-sensitive analog circuits.
Availability
BZX79-C2V7,143 is available at Aetrix Electronics and suitable for power supply feedback references, sensor bias networks, microcontroller reset circuits, and low-power analog front-ends requiring stable component supply and long-lifecycle support.
Supply support for BZX79-C2V7,143 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 expertise in automotive, industrial, and consumer-grade components.
The BZX79 series belongs to Nexperia's Zener diode product line, designed specifically for low-power voltage regulation and precision reference applications in cost-sensitive, high-reliability systems.
FAQ
What is the maximum continuous reverse current this diode can handle?
The BZX79-C2V7,143 has no specified maximum continuous reverse current rating because it operates in Zener breakdown mode - instead, its safe operating limit is defined by power dissipation. At 2.7 V, the absolute maximum continuous Zener current is approximately 148 mA (500 mW ÷ 2.7 V), assuming full derating at 50 °C ambient and proper PCB thermal design.
Can this diode be used in surface-mount designs?
No - the BZX79-C2V7,143 uses an axial-leaded SOD27 (DO-35) glass package intended for through-hole mounting only. It lacks solder pads or terminations compatible with reflow or wave soldering for SMT assembly. For surface-mount equivalents, consider Nexperia's MMBZ5221B or similar SOT-23 Zener diodes.
How does the −2.0 mV/K temperature coefficient affect circuit accuracy?
A −2.0 mV/K coefficient means the Zener voltage decreases by 2.0 mV per degree Celsius rise in junction temperature. Over a 100 °C range (−25 °C to +75 °C), this results in ~200 mV total drift - a 7.4% change relative to 2.7 V. For high-accuracy applications, this must be compensated via circuit design or paired with positive-tempco elements.
Is the cathode marked on the physical device?
Yes - the cathode is identified by a distinct color band (typically black or dark gray) located near one end of the glass body. This band corresponds to the cathode terminal in all official Nexperia documentation and must be oriented toward the higher-potential node when used in reverse-bias regulation mode.
BZX79-C2V7,143 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):
- 2.7 V
- Tolerance:
- ±5%
- Power - Max:
- 400 mW
- Impedance (Max) (Zzt):
- 100 Ohms
- Current - Reverse Leakage @ Vr:
- 20 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-C2V7,143 FAQ
1.How can I place an order for BZX79-C2V7,143 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX79-C2V7,143 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-C2V7,143 reliable?
The price and inventory of BZX79-C2V7,143 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX79-C2V7,143 is usually 5 days.
3.What payment methods are accepted for BZX79-C2V7,143?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX79-C2V7,143 transactions.
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4.How is shipping managed for BZX79-C2V7,143?
BZX79-C2V7,143 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX79-C2V7,143 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-C2V7,143?
For technical support, including BZX79-C2V7,143 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX79-C2V7,143 requirements.
6.How does Aetrix verify that BZX79-C2V7,143 is sourced from the original manufacturer or authorized distributors?
All BZX79-C2V7,143 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-C2V7,143 meets industry standards.
7.What is the process for return or replacement of BZX79-C2V7,143?
All BZX79-C2V7,143 units undergo pre-shipment inspection (PSI). If there is an issue with BZX79-C2V7,143, 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-C2V7,143 part is unused and in its original packaging.
Return procedure for BZX79-C2V7,143:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX79-C2V7,143 Tags
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