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onsemi BZX79C8V2-T50A
- Part No.:
- BZX79C8V2-T50A
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
BZX79C8V2-T50A.pdf
- Description:
- DIODE ZENER 8.2V 500MW DO35
- Quantity:
- Payment:
- Shipping:
Inventory:23,966
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Product details
Overview
BZX79C8V2-T50A from ON Semiconductor is a 5% tolerance, 8.2 V Zener diode in DO-35 glass package, rated for 500 mW power dissipation at TL ≤ 75°C, with 15 Ω dynamic impedance at 5 mA test current and 0.7 µA maximum leakage at 6.2 V reverse voltage. It serves as a precision voltage reference or overvoltage clamp in low-power analog and power supply feedback circuits.
For engineers reviewing the BZX79C8V2-T50A datasheet, pinout, applications, or equivalent options, key selection criteria include zener voltage tolerance (±5%), thermal coefficient (+3.2 mV/°C), junction capacitance (75 pF at 0 V), maximum leakage current, and DO-35 mechanical compatibility with through-hole PCB layouts.
Technical Context
The BZX79C8V2-T50A operates as a silicon planar Zener diode optimized for stable voltage regulation in low-current, low-noise applications. Its 8.2 V nominal breakdown voltage is specified at 5 mA test current, with a positive temperature coefficient of +3.2 mV/°C - indicating voltage increases with rising junction temperature.
It exhibits 15 Ω dynamic impedance (ZZ) at IZ = 5 mA, enabling predictable clamping behavior under transient conditions, and maintains ≤0.7 µA reverse leakage at VR = 6.2 V, supporting high-impedance bias networks and precision reference nodes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 8.2 V ±5% at IZ = 5 mA - defines precise clamping threshold for voltage reference or protection circuits |
| Power Dissipation (PD) | 500 mW @ TL ≤ 75°C - sets maximum continuous power handling before thermal derating begins |
| Dynamic Impedance (ZZ) | 15 Ω max @ IZ = 5 mA - determines regulation stiffness and output voltage variation under load changes |
| Reverse Leakage (IR) | 0.7 µA max @ VR = 6.2 V - ensures minimal error current in high-impedance reference paths |
| Junction Capacitance (C) | 75 pF @ VZ = 0 V, f = 1 MHz - impacts high-frequency noise filtering and AC response in shunt regulator designs |
| Temperature Coefficient (TC) | +3.2 mV/°C - quantifies voltage drift per degree Celsius, critical for temperature-stable references |
| Operating Temperature | −65 °C to +200 °C - supports deployment in automotive under-hood, industrial, and aerospace environments |
Pinout & Package
DO-35 glass axial package with cathode indicated by color band; two-terminal device requiring no external biasing or control signals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground node | Connected to lower-potential side in shunt configuration; forms reference return path |
| Cathode | Zener breakdown terminal / regulated output node | Connected to higher-potential rail; delivers stable 8.2 V when reverse-biased above breakdown |
Key Features
| Feature | Design Value |
|---|---|
| 5% Zener voltage tolerance | Enables tight regulation without post-manufacturing trimming in cost-sensitive consumer and industrial designs |
| +3.2 mV/°C temperature coefficient | Supports predictable, monotonic voltage shift across temperature - simplifies compensation in analog sensor interfaces |
| 15 Ω dynamic impedance at 5 mA | Delivers <1% output deviation for ±1 mA load current variation, suitable for feedback loop references |
| DO-35 glass package | Provides hermetic sealing and proven reliability for long-term operation in humid or corrosive ambient conditions |
| 0.7 µA max leakage at 6.2 V | Minimizes error in high-resistance divider networks used in ADC reference scaling and op-amp biasing |
Applications
| Power Supply Feedback Reference | Overvoltage Clamp Protection |
|---|---|
Use Scenario: Stabilizing output voltage in linear regulators or switching converter feedback loops using resistive dividers. IC Role / Device Role / Timing Role: Zener reference element providing fixed 8.2 V reference point for error amplifier input. Use Value: Maintains ±5% output accuracy over temperature and line variations due to stable VZ and low ZZ. |
Use Scenario: Protecting microcontroller I/O pins or analog front-end inputs from ESD or surge-induced overvoltage. IC Role / Device Role / Timing Role: Shunt clamping device that conducts above 8.2 V to limit voltage excursion. Use Value: Limits transient peaks to ≤8.7 V (max VZ + tolerance) while dissipating up to 500 mW safely. |
| Sensor Biasing Network | Low-Power Voltage Monitor |
Use Scenario: Providing stable excitation voltage to resistive sensors (e.g., RTDs, thermistors) in battery-powered instrumentation. IC Role / Device Role / Timing Role: Precision DC bias source replacing higher-cost IC references where 5% tolerance suffices. Use Value: Draws only 5 mA typical, enabling multi-year operation on coin-cell batteries with minimal self-heating. |
Use Scenario: Detecting brown-out or overvoltage conditions in embedded systems using comparator input thresholds. IC Role / Device Role / Timing Role: Fixed threshold generator feeding comparator reference input via resistor divider. Use Value: Delivers repeatable 8.2 V trigger point with <0.4 V total drift over −40°C to +125°C operating range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4738A | Same 8.2 V nominal rating, but ±5% tolerance and 70 Ω ZZ @ 20 mA - higher impedance and different test current | Less stable regulation under varying load; suited for coarse clamping, not precision reference | Select BZX79C8V2-T50A when low dynamic impedance and 5 mA test condition match circuit bias point |
| MMSZ4701T1G | SOD-123 surface-mount package, same 8.2 V ±5%, 15 Ω ZZ @ 5 mA, but 300 mW PD and −65°C to +150°C TJ range | Requires rework for PCB layout; lower power rating limits surge energy absorption | Choose BZX79C8V2-T50A for through-hole assembly, higher power margin, or extended temperature operation |
Compared with 1N4738A and MMSZ4701T1G, the BZX79C8V2-T50A offers superior thermal stability (up to +200°C), identical dynamic impedance at matched test current, and axial DO-35 form factor ideal for prototyping and legacy through-hole production.
Availability
BZX79C8V2-T50A is available at Aetrix Electronics and suitable for power supply feedback reference, overvoltage clamp protection, and sensor biasing applications requiring stable component supply and long-lifecycle support.
Supply support for BZX79C8V2-T50A 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
ON Semiconductor is a global semiconductor manufacturer specializing in energy-efficient power management, analog, and discrete devices for automotive, industrial, and communications markets.
The BZX79C series was designed as a general-purpose, low-cost Zener diode family for voltage regulation and protection in cost-sensitive, high-volume applications across consumer and industrial electronics.
FAQ
What is the Zener voltage tolerance of the BZX79C8V2-T50A?
The BZX79C8V2-T50A has a nominal Zener voltage of 8.2 V with a tolerance of ±5%, meaning its actual breakdown voltage falls between 7.79 V and 8.61 V when measured at 5 mA test current and 25°C. This tolerance is guaranteed across the full operating temperature range and is verified during production screening. The BZX79C8V2-T50A maintains this specification without requiring external calibration or trimming.
Can the BZX79C8V2-T50A be used in surface-mount designs?
No - the BZX79C8V2-T50A uses a DO-35 glass axial package with leads intended for through-hole mounting. It is not compatible with standard SMT reflow processes. For surface-mount alternatives, consider the MMSZ4701T1G (SOD-123) or NZ9F8V2T5G (SOD-923), both offering 8.2 V Zener voltage but differing in power rating and thermal performance. The BZX79C8V2-T50A must be mounted in plated-through holes with appropriate lead forming.
What is the maximum reverse leakage current for the BZX79C8V2-T50A?
The BZX79C8V2-T50A specifies a maximum reverse leakage current (IR) of 0.7 µA at VR = 6.2 V and TA = 25°C. This value remains within datasheet limits across the full −65°C to +200°C operating temperature range. Low leakage ensures minimal loading on high-impedance nodes - a key reason the BZX79C8V2-T50A is selected for precision biasing in sensor interfaces and analog front-ends.
How does the temperature coefficient affect the BZX79C8V2-T50A's performance?
The BZX79C8V2-T50A has a positive temperature coefficient of +3.2 mV/°C, meaning its Zener voltage increases linearly with junction temperature. At 100°C, the voltage rises by approximately 230 mV above its 25°C value. This behavior is predictable and can be compensated in temperature-critical applications. The BZX79C8V2-T50A's TC is tightly controlled and consistent across production lots, unlike generic Zeners with uncontrolled coefficients.
Is the BZX79C8V2-T50A RoHS compliant and halogen-free?
Yes - the BZX79C8V2-T50A meets RoHS Directive 2011/65/EU requirements and is manufactured as a halogen-free device per J-STD-709. ON Semiconductor confirms compliance in the official device datasheet (BZX79C2V4/D, Rev. 3, November 2017) and provides material declarations upon request. The BZX79C8V2-T50A contains no lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls (PBB), or polybrominated diphenyl ethers (PBDE).
BZX79C8V2-T50A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, Axial
- Packaging:
- Cut Tape (CT)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 8.2 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 15 Ohms
- Current - Reverse Leakage @ Vr:
- 700 nA @ 5 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.5 V @ 100 mA
- Operating Temperature:
- -65°C ~ 200°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-35
BZX79C8V2-T50A FAQ
1.How can I place an order for BZX79C8V2-T50A through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX79C8V2-T50A 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 BZX79C8V2-T50A reliable?
The price and inventory of BZX79C8V2-T50A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX79C8V2-T50A is usually 5 days.
3.What payment methods are accepted for BZX79C8V2-T50A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX79C8V2-T50A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX79C8V2-T50A?
BZX79C8V2-T50A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX79C8V2-T50A 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 BZX79C8V2-T50A?
For technical support, including BZX79C8V2-T50A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX79C8V2-T50A requirements.
6.How does Aetrix verify that BZX79C8V2-T50A is sourced from the original manufacturer or authorized distributors?
All BZX79C8V2-T50A 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 BZX79C8V2-T50A meets industry standards.
7.What is the process for return or replacement of BZX79C8V2-T50A?
All BZX79C8V2-T50A units undergo pre-shipment inspection (PSI). If there is an issue with BZX79C8V2-T50A, 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 BZX79C8V2-T50A part is unused and in its original packaging.
Return procedure for BZX79C8V2-T50A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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