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onsemi BZX85C8V2_T50R
- Part No.:
- BZX85C8V2_T50R
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
BZX85C8V2_T50R.pdf
- Description:
- DIODE ZENER 8.2V 1W DO41
- Quantity:
- Payment:
- Shipping:
Inventory:6,076
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Product details
Overview
BZX85C8V2_T50R from ON Semiconductor is a 8.2 V, ±5% tolerance, 1.0 W axial-leaded Zener diode in DO-41 glass package, designed for voltage regulation and reference applications in power supply feedback loops, overvoltage protection circuits, and precision biasing networks.
For engineers reviewing the BZX85C8V2_T50R datasheet, pinout, applications, or equivalent options, key selection criteria include zener voltage accuracy (7.7–8.7 V), dynamic impedance (25 Ω @ 5 mA), leakage current (≤0.5 μA @ 6.5 V), and thermal derating (6.67 mW/°C above 50°C).
Technical Context
The BZX85C8V2_T50R operates as a silicon planar Zener diode with controlled reverse breakdown at nominal 8.2 V, specified under thermal equilibrium conditions at lead temperature TL = 30°C ±1°C. Its DO-41 glass package provides hermetic sealing and stable long-term voltage reference performance.
It delivers regulated voltage output across a test current range of 5 mA (IZ) with low dynamic impedance (25 Ω), enabling stable clamping in low-power analog and digital supply rails. The device supports operation from –65°C to +200°C and exhibits ≤1.2 V forward voltage at 200 mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 7.7 V min to 8.7 V max at IZ = 5 mA - defines usable regulation window for 8.2 V nominal reference |
| Tolerance | ±5% - ensures predictable voltage setpoint without post-manufacture trimming |
| Power Dissipation | 1.0 W @ TA = 25°C - supports continuous regulation in compact PCB layouts with minimal heatsinking |
| Zener Impedance (ZZ) | 25 Ω @ IZ = 5 mA - limits output voltage variation under load transients |
| Leakage Current (IR) | ≤0.5 μA @ VR = 6.5 V - minimizes standby power loss in battery-backed circuits |
| Forward Voltage (VF) | ≤1.2 V @ IF = 200 mA - enables use as polarity-protected rectifier in dual-function designs |
| Operating Temp Range | –65°C to +200°C - suitable for under-hood automotive, industrial control, and aerospace environments |
Pinout & Package
DO-41 glass axial package with cathode indicated by color band; two-terminal device with no internal connections beyond anode and cathode leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference node | Connected to lower-potential side in reverse-bias regulation; used as ground reference in shunt regulator topologies |
| Cathode | Zener breakdown terminal / voltage clamp input | Connected to higher-potential rail; absorbs excess energy during overvoltage events to maintain downstream voltage stability |
Key Features
| Feature | Design Value |
|---|---|
| Stable Zener voltage with tight 5% tolerance | Enables accurate voltage setting without external calibration in cost-sensitive consumer and industrial power supplies |
| Low dynamic impedance (25 Ω) | Maintains <±20 mV output deviation across 1–10 mA load current changes in feedback references |
| Hermetically sealed DO-41 glass package | Ensures long-term parameter stability and moisture resistance in harsh environments |
| Wide operating temperature range (–65°C to +200°C) | Supports deployment in engine control units, motor drives, and outdoor infrastructure without derating penalties |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Integrated into optocoupler-coupled feedback loop of isolated DC-DC converter to regulate 12 V output rail. IC Role / Device Role / Timing Role: Zener reference element providing precise 8.2 V threshold to TL431 error amplifier input. Use Value: Maintains ±1.5% output regulation across line/load variations due to stable VZ and low ZZ. | Use Scenario: Placed across microcontroller I/O rail to suppress ESD-induced transients exceeding 9 V. IC Role / Device Role / Timing Role: Shunt clamping device diverting surge current away from sensitive CMOS inputs. Use Value: Limits peak voltage to ≤8.7 V with <100 ns response, preventing latch-up per IEC 61000-4-2 Level 4. |
| Reference Voltage Source | Linear Regulator Bias Network |
Use Scenario: Supplies stable 8.2 V reference to ADC voltage divider in industrial sensor signal conditioning circuit. IC Role / Device Role / Timing Role: Precision voltage reference establishing known scaling ratio for analog-to-digital conversion. Use Value: Delivers <50 ppm/°C drift contribution and <0.5 μA leakage, preserving 12-bit measurement accuracy. | Use Scenario: Sets base bias point for pass transistor in discrete 5 V linear regulator driving FPGA core logic. IC Role / Device Role / Timing Role: Zener-based voltage dropper defining emitter-base differential for series pass element. Use Value: Enables thermal-stable bias generation with <±2% variation over –40°C to +85°C ambient. |
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, 1.0 W, DO-41, ZZ = 5 Ω @ 21 mA - lower impedance at higher test current | Optimized for higher-current regulation; less stable at sub-5 mA bias points | Select when operating near 20 mA and requiring tighter dynamic regulation |
| BZX55C8V2 | Same 8.2 V, ±5%, DO-35 package, 500 mW rating, ZZ = 35 Ω @ 5 mA - lower power and higher impedance | Suitable for low-power signal-level clamping only; not rated for >0.5 W dissipation | Choose for space-constrained PCBs where thermal budget limits power handling |
Compared with BZX85C8V2_T50R, the 1N4738A offers lower impedance at higher currents but requires re-biasing for optimal performance, while the BZX55C8V2 trades power capability for smaller footprint-neither is pin-compatible due to differing DO-41 vs. DO-35 mechanical outlines.
Availability
BZX85C8V2_T50R is available at Aetrix Electronics and suitable for switch-mode power supply feedback, overvoltage protection clamp, and reference voltage source applications requiring stable component supply, consistent parametric performance, and long-term manufacturability.
Supply support for BZX85C8V2_T50R 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, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The BZX85C8V2_T50R belongs to the BZX85C series of general-purpose Zener diodes engineered for reliable voltage regulation and transient suppression in cost-sensitive, high-volume power management systems.
FAQ
What is the nominal Zener voltage of the BZX85C8V2_T50R?
The BZX85C8V2_T50R has a nominal Zener voltage of 8.2 V, with a guaranteed range of 7.7 V to 8.7 V at test current IZ = 5 mA and lead temperature TL = 30°C ±1°C. This voltage is measured under thermal equilibrium conditions and reflects the device's primary function as a precision shunt voltage reference in power and protection circuits.
What package type does the BZX85C8V2_T50R use?
The BZX85C8V2_T50R uses the DO-41 axial-leaded, hermetically sealed glass package per JEDEC DO-204AL standard. It features a cathode identification band and is mechanically compatible with through-hole assembly processes. The package supports 1.0 W power dissipation at 25°C ambient and includes thermal derating of 6.67 mW/°C above 50°C.
How does the BZX85C8V2_T50R compare to the BZX55C8V2 in terms of power handling?
The BZX85C8V2_T50R is rated for 1.0 W power dissipation at 25°C, whereas the BZX55C8V2 is limited to 500 mW in its smaller DO-35 package. This 2× power margin allows the BZX85C8V2_T50R to sustain higher continuous clamping energy in overvoltage protection applications and deliver more stable regulation under elevated thermal loads without derating penalties.
What is the maximum leakage current specification for the BZX85C8V2_T50R?
The BZX85C8V2_T50R specifies a maximum leakage current of 0.5 μA at reverse voltage VR = 6.5 V and ambient temperature TA = 25°C. This ultra-low leakage supports energy-efficient operation in battery-powered systems and preserves accuracy in high-impedance reference networks where even nanoamp-level currents affect voltage division ratios.
Can the BZX85C8V2_T50R be used in automotive under-hood applications?
Yes, the BZX85C8V2_T50R is qualified for operation from –65°C to +200°C and housed in a hermetically sealed DO-41 glass package, making it suitable for under-hood automotive applications such as engine control unit voltage supervision, alternator field regulation, and transmission control module overvoltage clamping where extended temperature stability and long-term reliability are required.
BZX85C8V2_T50R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 8.2 V
- Tolerance:
- ±6%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 5 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 5 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.2 V @ 200 mA
- Operating Temperature:
- -65°C ~ 200°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-41
BZX85C8V2_T50R FAQ
1.How can I place an order for BZX85C8V2_T50R through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX85C8V2_T50R 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 BZX85C8V2_T50R reliable?
The price and inventory of BZX85C8V2_T50R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX85C8V2_T50R is usually 5 days.
3.What payment methods are accepted for BZX85C8V2_T50R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX85C8V2_T50R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX85C8V2_T50R?
BZX85C8V2_T50R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX85C8V2_T50R 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 BZX85C8V2_T50R?
For technical support, including BZX85C8V2_T50R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX85C8V2_T50R requirements.
6.How does Aetrix verify that BZX85C8V2_T50R is sourced from the original manufacturer or authorized distributors?
All BZX85C8V2_T50R 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 BZX85C8V2_T50R meets industry standards.
7.What is the process for return or replacement of BZX85C8V2_T50R?
All BZX85C8V2_T50R units undergo pre-shipment inspection (PSI). If there is an issue with BZX85C8V2_T50R, 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 BZX85C8V2_T50R part is unused and in its original packaging.
Return procedure for BZX85C8V2_T50R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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