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Renesas RD8.2JS-AZ
- Part No.:
- RD8.2JS-AZ
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
RD8.2JS-AZ.pdf
- Description:
- DIODE ZENER
- Quantity:
- Payment:
- Shipping:
Inventory:7,500
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Product details
Overview
RD8.2JS-AZ from Renesas Electronics is a 400 mW, DO-34 glass-sealed Zener diode with nominal zener voltage 8.2 V (±5% tolerance per AB1/AB2/AB3 suffix), sharp breakdown characteristic, low noise performance (en = 30 µV at Vz = 8.2 V, f = 10–500 kHz), and dynamic impedance Zz = 15 Ω at Iz = 5 mA - used for precision voltage reference and waveform clipping in analog signal conditioning circuits.
For engineers reviewing the RD8.2JS-AZ datasheet, RD8.2JS-AZ pinout, RD8.2JS-AZ application, or RD8.2JS-AZ equivalent, this component serves as a stable, low-noise, low-power shunt regulator in industrial sensor interfaces, power supply feedback loops, and overvoltage protection stages where tight voltage regulation and minimal noise injection are required.
Technical Context
The RD8.2JS-AZ operates as a silicon planar Zener diode in reverse-biased breakdown mode, optimized for sharp knee characteristics and low dynamic impedance to maintain stable regulation under varying load currents. Its DHD (Double Heatsink Diode) construction enables 400 mW steady-state dissipation in the compact DO-34 package.
It exhibits a negative temperature coefficient of −γz = −0.02 %/°C near 8.2 V, resulting in a drift of approximately −1.65 mV/°C, and maintains low noise spectral density (30 µV RMS, 10–500 kHz) critical for high-fidelity reference applications. Surge capability supports non-repetitive 2.4 W pulses (t = 10 µs).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage Vz | 7.76–8.64 V at Iz = 5 mA (AB1–AB3 variants); defines precise clamping/reference level in shunt regulation |
| Power Dissipation P | 400 mW at TA = 25 °C; sets maximum continuous DC power handling without derating |
| Dynamic Impedance Zz | 15 Ω at Iz = 5 mA; ensures <15 mV output variation per 1 mA load current change |
| Reverse Current IR | ≤0.5 µA at VR = 5.0 V; guarantees minimal leakage below breakdown, preserving accuracy in high-impedance nodes |
| Noise Level en | 30 µV RMS (10–500 kHz); enables use in low-noise analog references without added filtering |
| Surge Power PRSM | 2.4 W (t = 10 µs); allows transient overvoltage absorption in protection circuits |
| Junction Temp Tj | 175 °C max; supports operation in elevated ambient environments with appropriate PCB thermal relief |
Pinout & Package
RD8.2JS-AZ uses the DO-34 (JEDEC) axial glass package: 2.4 mm max body length, 25° cathode band marking (blue color), with two leads - anode and cathode - identified by cathode band. No internal terminals beyond the two external leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Breakdown voltage reference node | Connected to regulated voltage rail; reverse bias establishes fixed Vz drop |
| Anode | Reference return / ground reference | Typically tied to system ground or lower-potential node; completes shunt current path |
Key Features
| Feature | Design Value |
|---|---|
| DO-34 glass sealed package | Hermetic sealing ensures long-term parameter stability and moisture resistance in industrial environments |
| Sharp breakdown knee | Enables clean transition into regulation with minimal voltage hysteresis across operating current range |
| Low noise (30 µV) | Reduces unwanted signal modulation in precision analog front-ends and sensor excitation circuits |
| Vz compliant with E24 standard | Supports standardized BOM selection and interchangeability within common zener voltage series |
| DHD construction | Enhances thermal coupling to PCB copper, improving power handling vs. conventional DO-34 diodes |
Applications
| Industrial Sensor Signal Conditioning | Switching Power Supply Feedback |
|---|---|
|
Use Scenario: Stabilizing excitation voltage for bridge-based pressure/temperature sensors in factory automation systems. IC Role / Device Role / Timing Role: Shunt voltage reference providing fixed 8.2 V bias to sensor Wheatstone bridge. Use Value: Low dynamic impedance (15 Ω) minimizes output deviation under sensor loading; low noise prevents corruption of µV-level bridge outputs. |
Use Scenario: Setting regulated feedback threshold in isolated flyback converter secondary-side error amplifiers. IC Role / Device Role / Timing Role: Precision zener clamp defining optocoupler LED drive voltage for primary-side PWM control. Use Value: Tight Vz tolerance (±5%) and sharp knee ensure consistent regulation across line/load transients, improving output voltage accuracy ±1.5%. |
| Overvoltage Protection Clamp | Analog Waveform Clipping |
|
Use Scenario: Protecting ADC input pins from ESD-induced transients in data acquisition modules. IC Role / Device Role / Timing Role: Fast-acting shunt limiter clamping input to ≤8.64 V during surge events. Use Value: 2.4 W surge rating (10 µs) absorbs IEC 61000-4-2 contact discharge energy without degradation; DO-34 form factor fits dense PCB layouts. |
Use Scenario: Limiting audio signal peaks in preamplifier stage to prevent op-amp saturation. IC Role / Device Role / Timing Role: Symmetric dual-zener clipper (with complementary diode) shaping signal envelope at ±8.2 V. Use Value: Sharp breakdown ensures crisp clipping onset; low noise avoids audible artifacts in signal path. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX55C8V2 (ON Semiconductor) | Same DO-35 package, 8.2 V ±5%, P = 500 mW, Zz = 15 Ω, but higher IR (≤1.0 µA @ VR = 5 V) | Slightly higher leakage may affect ultra-high-impedance bias networks | Preferred where higher power margin is needed; verify layout compatibility with DO-35 footprint |
| 1N4736A (onsemi) | DO-41 package, 8.2 V ±5%, P = 1 W, Zz = 7 Ω, IR ≤ 10 µA @ VR = 6 V - larger size, lower Zz | Not suitable for space-constrained DO-34 layouts; better for high-current regulation | Choose when lower dynamic impedance (<7 Ω) and higher power handling are prioritized over board area |
Compared with RD8.2JS-AZ, BZX55C8V2 offers +100 mW power headroom but trades off leakage performance, while 1N4736A delivers superior regulation stiffness at the cost of footprint and thermal profile - making RD8.2JS-AZ optimal for compact, low-noise, industrial-grade shunt references.
Availability
RD8.2JS-AZ is available at Aetrix Electronics and suitable for industrial sensor interfaces, switching power supply feedback loops, and overvoltage protection circuits requiring stable component supply, long-lifecycle support, and RoHS-compliant sourcing.
Supply support for RD8.2JS-AZ 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 global semiconductor leader delivering microcontrollers, analog, power, and timing solutions for automotive, industrial, and enterprise applications.
The RDxJS series was designed specifically for general-purpose, low-noise, precision voltage regulation in Standard-grade industrial equipment - emphasizing reliability, tight tolerances, and robustness in uncontrolled ambient conditions.
FAQ
What is the exact zener voltage range for RD8.2JS-AZ at 5 mA test current?
The RD8.2JS-AZ has a guaranteed zener voltage range of 7.76 V to 8.64 V when measured at Iz = 5 mA, corresponding to the AB1 (7.76–8.10 V), AB2 (8.02–8.36 V), and AB3 (8.28–8.64 V) suffix variants. This range reflects the E24-standardized 8.2 V nominal value with ±5% tolerance, verified per Renesas datasheet D13937EJ5V0DS00.
Is RD8.2JS-AZ RoHS compliant and lead-free?
Yes, RD8.2JS-AZ is RoHS compliant and lead-free, consistent with Renesas Electronics' environmental policy and EU Directive 2011/65/EU. The DO-34 glass package contains no restricted substances above threshold limits, and full compliance documentation is available through Renesas' official product page and material declarations.
Can RD8.2JS-AZ be used in place of a 1N4736A in a feedback circuit?
RD8.2JS-AZ is not a direct replacement for 1N4736A due to differences in package (DO-34 vs. DO-41), power rating (400 mW vs. 1 W), and dynamic impedance (15 Ω vs. 7 Ω). While both regulate at ~8.2 V, RD8.2JS-AZ suits space-constrained, low-power designs; substituting it into a 1N4736A layout requires PCB revision and thermal validation.
What is the maximum allowable reverse surge power for RD8.2JS-AZ?
The RD8.2JS-AZ supports a non-repetitive surge reverse power of 2.4 W at pulse width t = 10 µs, as specified in Figure 9 of the Renesas datasheet D13937EJ5V0DS00. This rating enables transient overvoltage suppression without permanent degradation, provided pulse repetition remains infrequent and average power stays within 400 mW limits.
Does RD8.2JS-AZ have a specified junction-to-ambient thermal resistance?
RD8.2JS-AZ does not specify a fixed Rth(j-a) value; instead, its thermal performance is defined via Fig. 5 (P-TA rating) and Fig. 7 (Rth-S curves), showing that at S = 5 mm² copper area, Rth ≈ 500 °C/W. Actual thermal resistance depends on PCB copper area and thickness - design must follow Renesas' recommended 5 mm² minimum copper pad for 400 mW operation at TA = 25 °C.
RD8.2JS-AZ 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:
- -
RD8.2JS-AZ FAQ
1.How can I place an order for RD8.2JS-AZ through Aetrix?
Please submit a Request for Quotation (RFQ) for RD8.2JS-AZ 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 RD8.2JS-AZ reliable?
The price and inventory of RD8.2JS-AZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RD8.2JS-AZ is usually 5 days.
3.What payment methods are accepted for RD8.2JS-AZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RD8.2JS-AZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RD8.2JS-AZ?
RD8.2JS-AZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RD8.2JS-AZ 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 RD8.2JS-AZ?
For technical support, including RD8.2JS-AZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RD8.2JS-AZ requirements.
6.How does Aetrix verify that RD8.2JS-AZ is sourced from the original manufacturer or authorized distributors?
All RD8.2JS-AZ 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 RD8.2JS-AZ meets industry standards.
7.What is the process for return or replacement of RD8.2JS-AZ?
All RD8.2JS-AZ units undergo pre-shipment inspection (PSI). If there is an issue with RD8.2JS-AZ, 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 RD8.2JS-AZ part is unused and in its original packaging.
Return procedure for RD8.2JS-AZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
RD8.2JS-AZ Tags
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MM5Z5V1ST1G
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