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Renesas RD8.2F
- Part No.:
- RD8.2F
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
RD8.2F.pdf
- Description:
- DIODE ZENER
- Quantity:
- Payment:
- Shipping:
Inventory:92,800
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Product details
Overview
RD8.2F from Renesas Electronics is a 1 W planar silicon Zener diode in DO-41 glass-sealed DHD package, rated for 8.12–8.54 V zener voltage at 40 mA test current, with 5.0 Ω dynamic impedance and +4.5 mV/°C temperature coefficient. It serves as a precision voltage reference and overvoltage clamp in power supply regulation and signal conditioning circuits.
For engineers reviewing the RD8.2F datasheet, RD8.2F pinout, RD8.2F application, or RD8.2F equivalent, key selection criteria include its ±0.21 V zener tolerance at 40 mA, 40 μA reverse leakage at 6.5 V, 175°C maximum junction temperature, and suitability for constant-voltage regulation in industrial-grade consumer and office equipment.
Technical Context
The RD8.2F operates as a two-terminal voltage-reference device with sharp reverse-breakdown characteristics, optimized for stable DC regulation under steady-state and transient conditions. Its planar DHD structure provides low thermal resistance and reliable heat dissipation in through-hole PCB layouts.
It exhibits a positive temperature coefficient (+4.5 mV/°C) indicating increasing zener voltage with rising ambient temperature - a critical factor when designing temperature-stable references across −65°C to +175°C storage range. The device is not intended for high-frequency clamping due to inherent junction capacitance not specified in the datasheet.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 8.12–8.54 V at IZ = 40 mA - defines nominal regulation point with ±0.21 V tolerance for precision biasing |
| Dynamic Impedance (ZZ) | 5.0 Ω max at IZ = 40 mA - ensures minimal output voltage variation under load current changes |
| Reverse Leakage Current (IR) | 20 μA max at VR = 6.5 V - guarantees low standby power loss in high-impedance sensing nodes |
| Power Dissipation (P) | 1.0 W at TA = 25°C - supports continuous operation without heatsinking in standard FR-4 layouts |
| Temperature Coefficient (γZ) | +4.5 mV/°C typical - enables predictable drift compensation in temperature-critical references |
| Junction Temperature (Tj) | 175°C max - allows reliable operation in enclosed enclosures with limited airflow |
| Surge Reverse Power (PRSM) | 400 W for t = 10 μs - provides transient overvoltage immunity against ESD and inductive spikes |
Pinout & Package
RD8.2F uses a DO-41 glass-sealed axial package with cathode indicated by a black band. The device has two terminals: anode and cathode - no internal circuitry or additional pins.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential node in reverse-biased regulation configuration |
| Cathode | Zener breakdown terminal | Marked with black band; connected to higher-potential node to enable controlled reverse conduction |
Key Features
| Feature | Design Value |
|---|---|
| E24-series zener voltage grading | Enables standardized BOM management across 2–82 V range with consistent test methodology |
| Planar DHD (Double Heatsink Diode) structure | Improves thermal coupling to PCB copper, reducing effective RthJA vs. conventional axial diodes |
| 1 W power rating with 175°C Tj | Supports robust operation in space-constrained industrial environments without derating below 100°C ambient |
| B-grade voltage classification (B1/B2/B3 options) | Allows selective binning for tighter VZ tolerance (±0.11 V for B1) in high-accuracy applications |
| DO-41 JEDEC compliance | Ensures mechanical compatibility with automated insertion equipment and legacy socket footprints |
Applications
| Power Supply Voltage Reference | Waveform Clipping Circuit |
|---|---|
Use Scenario: Stabilizing feedback voltage in linear regulator ICs or op-amp-based shunt regulators. IC Role / Device Role / Timing Role: Provides fixed reference potential against which output voltage is compared and adjusted. Use Value: Maintains ±1% output regulation accuracy despite input ripple and load variation, leveraging 5.0 Ω ZZ and low IR. |
Use Scenario: Limiting analog signal peaks in audio preamplifier stages or sensor front-ends. IC Role / Device Role / Timing Role: Acts as bidirectional voltage clamp to prevent amplifier saturation or ADC overrange. Use Value: Delivers fast, repeatable clipping at 8.2 V with sub-10 ns response to transients, enabled by low-junction-capacitance planar construction. |
| Surge Protection Node | Constant-Current Bias Source |
Use Scenario: Absorbing inductive kickback in relay driver circuits or motor control H-bridges. IC Role / Device Role / Timing Role: Shunts transient energy away from sensitive logic or gate drivers during switch-off events. Use Value: Withstands 400 W surge pulses (10 μs), protecting downstream components without degradation after repeated events. |
Use Scenario: Generating stable bias current for LED drivers or transistor amplifiers using resistor-Zener network. IC Role / Device Role / Timing Role: Sets precise current via VZ/R relationship in series with current-setting resistor. Use Value: Enables ±2% current stability over temperature (−40°C to +85°C) due to predictable +4.5 mV/°C γZ. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor MMBZ5231BS | Surface-mount SOD-123 package; 5.1 V nominal; 10 Ω ZZ; −2.5 mV/°C γZ | Lower power (0.35 W); unsuitable for 1 W continuous dissipation or high-surge scenarios | Select only for space-constrained PCBs where DO-41 footprint is unavailable and thermal budget permits derating |
| Vishay BZX55-C8V2 | DO-35 glass package; same 8.2 V nominal; 7 Ω ZZ; +4.0 mV/°C γZ; 0.5 W rating | Halved power capability limits sustained current handling and surge margin vs. RD8.2F's 1 W/400 W ratings | Acceptable for low-duty-cycle reference use but not for continuous 40 mA regulation or repetitive surge absorption |
Compared with MMBZ5231BS and BZX55-C8V2, RD8.2F delivers superior thermal robustness, higher surge immunity, and tighter VZ consistency across temperature - making it preferred for industrial power supplies and protection circuits where reliability under stress is mandatory.
Availability
RD8.2F is available at Aetrix Electronics and suitable for power supply regulation, waveform clipping, surge absorption, and constant-current biasing requiring stable component supply and long-term obsolescence management.
Supply support for RD8.2F 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
Renesas Electronics Corporation is a Japanese semiconductor manufacturer formed in 2010 through the merger of NEC Electronics and Renesas Technology, specializing in microcontrollers, analog, and discrete power devices.
RD8.2F belongs to Renesas' legacy planar Zener diode family designed for general-purpose voltage regulation and protection in standard-grade industrial and consumer electronics.
FAQ
What is the zener voltage tolerance of RD8.2F at its rated test current?
The RD8.2F has a zener voltage range of 8.12 V to 8.54 V when tested at IZ = 40 mA, yielding a ±0.21 V absolute tolerance. This corresponds to approximately ±2.6% deviation from the nominal 8.2 V value and is verified per the B-grade specification in Renesas datasheet D13936EJ5V0DS. RD8.2F maintains this tolerance across its qualified operating temperature range without recalibration.
Can RD8.2F be used in surface-mount designs?
No - RD8.2F is packaged exclusively in the axial DO-41 through-hole format with lead spacing optimized for wave soldering and manual assembly. It lacks SMD-compatible variants such as SOD-123 or SOD-323. For surface-mount equivalents, engineers must select alternative parts like BZX84-C8V2 or MMSZ5231BT1G, which differ in power rating, impedance, and thermal performance from RD8.2F.
What is the maximum reverse leakage current for RD8.2F, and at what voltage is it specified?
RD8.2F specifies a maximum reverse leakage current (IR) of 20 μA at VR = 6.5 V, measured at TA = 25°C. This parameter ensures minimal parasitic loading on high-impedance nodes - critical in precision reference and battery-powered applications. Leakage remains below 100 μA up to 8.0 V, per typical characterization curves in the RD2.0F–RD82F datasheet.
How does the temperature coefficient of RD8.2F affect its performance in wide-temperature applications?
RD8.2F has a typical zener voltage temperature coefficient (γZ) of +4.5 mV/°C, meaning its regulated voltage increases linearly with temperature. Over a −40°C to +125°C range, this results in ~740 mV total drift. Designers must compensate using complementary components (e.g., NTC thermistors) or select alternate parts like RD6.2F (γZ = +2.0 mV/°C) if tighter thermal stability is required. RD8.2F itself does not include integrated compensation.
Is RD8.2F compliant with RoHS and halogen-free standards?
Yes - RD8.2F conforms to EU RoHS Directive 2011/65/EU and is halogen-free per J-STD-709 definitions, as confirmed in Renesas' environmental compliance documentation. The glass-sealed DO-41 package contains no lead in solderable terminations beyond RoHS-exempt levels, and all materials meet IPC-1752 reporting requirements. Full declarations are available upon request from Aetrix Electronics.
RD8.2F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- -
- Tolerance:
- -
- Power - Max:
- -
- Impedance (Max) (Zzt):
- -
- Current - Reverse Leakage @ Vr:
- -
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
RD8.2F FAQ
1.How can I place an order for RD8.2F through Aetrix?
Please submit a Request for Quotation (RFQ) for RD8.2F 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 RD8.2F reliable?
The price and inventory of RD8.2F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RD8.2F is usually 5 days.
3.What payment methods are accepted for RD8.2F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RD8.2F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RD8.2F?
RD8.2F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RD8.2F 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 RD8.2F?
For technical support, including RD8.2F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RD8.2F requirements.
6.How does Aetrix verify that RD8.2F is sourced from the original manufacturer or authorized distributors?
All RD8.2F 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 RD8.2F meets industry standards.
7.What is the process for return or replacement of RD8.2F?
All RD8.2F units undergo pre-shipment inspection (PSI). If there is an issue with RD8.2F, 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 RD8.2F part is unused and in its original packaging.
Return procedure for RD8.2F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
RD8.2F Tags
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Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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BZT52C15-7-F
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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MMSZ4682T1G
onsemi
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
Micro Commercial Co
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BZT52C3V6LP-7
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SMAZ12-13-F
Diodes Incorporated
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