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Renesas RD4.7JS(1)-T1-AZ
- Part No.:
- RD4.7JS(1)-T1-AZ
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
RD4.7JS(1)-T1-AZ.pdf
- Description:
- DIODE ZENER
- Quantity:
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Inventory:22,000
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Product details
Overview
RD4.7JS(1)-T1-AZ from Renesas Electronics is a 4.7 V, 400 mW DO-34 glass-sealed Zener diode with sharp breakdown characteristics, low noise performance (en ≤ 50 µV at 10–500 kHz), and ±5% zener voltage tolerance at 5 mA, used for precision voltage reference and waveform clipping in power supply regulation circuits.
For engineers reviewing the RD4.7JS(1)-T1-AZ datasheet, RD4.7JS(1)-T1-AZ pinout, RD4.7JS(1)-T1-AZ application, or RD4.7JS(1)-T1-AZ equivalent, this page delivers verified electrical specs, thermal behavior, package dimensions, and real-world selection guidance for stable voltage stabilization in industrial and consumer electronics.
Technical Context
This device operates as a two-terminal voltage-reference element with a nominal zener voltage of 4.7 V measured at 5 mA test current, exhibiting dynamic impedance Zz ≤ 20 Ω and knee impedance Zzk ≤ 800 Ω - enabling tight regulation under varying load conditions. Its DO-34 glass package provides hermetic sealing and thermal resistance Rth(j-a) ≈ 375 °C/W on minimal PCB copper area.
The RD4.7JS(1)-T1-AZ features a negative temperature coefficient (−γz ≈ −0.02 %/°C) near 4.7 V, low reverse leakage (IR ≤ 100 µA at VR = 0.5 V), and surge capability of 2.4 W for 10 µs pulses - supporting transient-tolerant biasing in analog front-ends and protection circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage Vz | 4.42–4.90 V at Iz = 5 mA - defines stable regulation point for feedback networks and reference rails. |
| Power Dissipation P | 400 mW at TA = 25 °C - sets maximum continuous DC power handling without derating. |
| Dynamic Impedance Zz | ≤ 20 Ω at Iz = 5 mA - ensures minimal output voltage variation under load current changes. |
| Reverse Leakage IR | ≤ 100 µA at VR = 0.5 V - guarantees low quiescent current in high-impedance bias applications. |
| Noise Level en | ≤ 50 µV (RMS) over 10–500 kHz - supports low-noise analog references in sensor signal chains. |
| Surge Power PRSM | 2.4 W for t = 10 µs - enables transient suppression in clamp circuits without failure. |
| Junction Temp Tj | 175 °C max - allows operation in elevated ambient environments with appropriate thermal design. |
Pinout & Package
RD4.7JS(1)-T1-AZ uses a DO-34 axial glass package (JEDEC standard), 2.4 mm max body length, with cathode indicated by a blue band. It is a two-terminal device: anode and cathode only.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Reference ground node | Connected to circuit ground or lower-potential rail when used in reverse-biased regulation mode. |
| Cathode | Zener breakdown terminal / Output reference node | Provides stabilized 4.7 V output relative to anode; marked with blue band for polarity identification. |
Key Features
| Feature | Design Value |
|---|---|
| Low noise performance | en ≤ 50 µV RMS (10–500 kHz) - reduces interference in precision analog references and sensor excitation. |
| Sharp breakdown knee | Zzk ≤ 800 Ω at low Iz - improves regulation stability at light loads and enhances waveform clipping fidelity. |
| DO-34 glass seal | Hermetic, moisture-resistant enclosure - ensures long-term reliability in humid or variable-environment deployments. |
| E24-standard Vz grading | Vz tolerance ±5% (AB1/AB2/AB3 variants) - enables predictable binning for cost-sensitive voltage reference designs. |
| High surge robustness | PRSM = 2.4 W (10 µs pulse) - supports use in transient-prone input stages without external TVS supplementation. |
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: Two-terminal passive voltage reference providing precise 4.7 V setpoint. Use Value: Enables ±1% output regulation accuracy with minimal external components and no active biasing. |
Use Scenario: Limiting AC signal amplitude in audio preamplifier inputs or sensor signal conditioning paths. IC Role / Device Role / Timing Role: Bidirectional clamping element defining symmetrical peak voltage thresholds. Use Value: Delivers sharp, repeatable clipping edges due to low Zzk and fast response (<1 ns recovery). |
| Current Source Biasing | Overvoltage Protection Node |
|
Use Scenario: Generating stable bias current for transistor amplifiers or LED drivers via series resistor + Zener. IC Role / Device Role / Timing Role: Constant-voltage drop element establishing fixed voltage across current-setting resistor. Use Value: Achieves <±2% current stability over −40°C to +85°C ambient with simple single-component solution. |
Use Scenario: Protecting microcontroller I/O pins or ADC inputs from accidental overvoltage events. IC Role / Device Role / Timing Role: Passive crowbar element clamping voltage to 4.7 V before damage threshold. Use Value: Absorbs 2.4 W transients without degradation, eliminating need for additional TVS diodes in low-energy systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX55C4V7 (ON Semiconductor) | Same 4.7 V nominal, 500 mW rating, DO-35 package - 0.3 mm longer body, slightly higher Zz (≤ 60 Ω). | Higher power margin but larger footprint; less suitable for space-constrained DO-34 layouts. | Select when higher surge energy handling or legacy BZX55 compatibility is required. |
| 1N4732A (Vishay) | 4.7 V, 1 W rating, DO-41 package - significantly larger size, higher thermal mass, Zz ≤ 14 Ω. | Not interchangeable in DO-34 footprints; better for high-power dissipation but incompatible with miniaturized PCBs. | Choose only if board layout allows DO-41 and >400 mW continuous dissipation is needed. |
Compared with BZX55C4V7 and 1N4732A, RD4.7JS(1)-T1-AZ offers optimal balance of low-noise performance, DO-34 compactness, and sharp knee behavior - making it preferred for space-limited, low-distortion reference and clipping roles where 400 mW suffices.
Availability
RD4.7JS(1)-T1-AZ is available at Aetrix Electronics and suitable for power supply regulation, waveform clipping, current source biasing, and overvoltage protection requiring stable component supply and consistent parametric performance across production batches.
Supply support for RD4.7JS(1)-T1-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 Japanese semiconductor manufacturer specializing in microcontrollers, analog and power devices, and system-on-chip solutions for industrial, automotive, and consumer markets.
The RD4.7JS series belongs to Renesas' legacy Zener diode product line designed specifically for precision voltage reference and signal conditioning in cost-sensitive, high-reliability consumer and industrial electronics.
FAQ
What is the exact zener voltage range for RD4.7JS(1)-T1-AZ at 5 mA?
The RD4.7JS(1)-T1-AZ has a guaranteed zener voltage range of 4.42 V to 4.90 V when tested at Iz = 5 mA and TA = 25 °C, per the AB-grade specification in Renesas datasheet D13937EJ5V0DS00. This ±5% tolerance aligns with E24 standard grading and applies directly to the RD4.7JS(1)-T1-AZ variant.
Is RD4.7JS(1)-T1-AZ RoHS compliant?
Yes, RD4.7JS(1)-T1-AZ meets EU RoHS Directive requirements as confirmed by Renesas Electronics' environmental compliance documentation. The DO-34 glass package contains no lead in solder joints or internal construction, and all materials comply with restricted substance limits effective at time of manufacture.
What is the maximum allowable junction temperature for RD4.7JS(1)-T1-AZ?
The absolute maximum junction temperature for RD4.7JS(1)-T1-AZ is 175 °C, as specified in the Absolute Maximum Ratings table of the official Renesas datasheet. Operation above this temperature risks irreversible degradation of the PN junction and must be avoided through proper thermal design and ambient derating.
Does RD4.7JS(1)-T1-AZ have a specified noise spectral density?
RD4.7JS(1)-T1-AZ specifies total integrated noise en ≤ 50 µV RMS over 10–500 kHz (Fig. 8, datasheet D13937EJ5V0DS00). While spectral density isn't tabulated, this measured broadband value confirms suitability for low-noise reference applications where <100 µV noise is acceptable.
Can RD4.7JS(1)-T1-AZ replace a 1N4732A in the same PCB footprint?
No - RD4.7JS(1)-T1-AZ uses a DO-34 package (2.4 mm body length), while 1N4732A uses DO-41 (4.0 mm body length). The pin spacing, diameter, and mechanical fit are incompatible. Direct replacement would require PCB redesign; RD4.7JS(1)-T1-AZ is not a footprint-compatible alternative to 1N4732A.
RD4.7JS(1)-T1-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:
- -
RD4.7JS(1)-T1-AZ FAQ
1.How can I place an order for RD4.7JS(1)-T1-AZ through Aetrix?
Please submit a Request for Quotation (RFQ) for RD4.7JS(1)-T1-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 RD4.7JS(1)-T1-AZ reliable?
The price and inventory of RD4.7JS(1)-T1-AZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RD4.7JS(1)-T1-AZ is usually 5 days.
3.What payment methods are accepted for RD4.7JS(1)-T1-AZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RD4.7JS(1)-T1-AZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RD4.7JS(1)-T1-AZ?
RD4.7JS(1)-T1-AZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RD4.7JS(1)-T1-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 RD4.7JS(1)-T1-AZ?
For technical support, including RD4.7JS(1)-T1-AZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RD4.7JS(1)-T1-AZ requirements.
6.How does Aetrix verify that RD4.7JS(1)-T1-AZ is sourced from the original manufacturer or authorized distributors?
All RD4.7JS(1)-T1-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 RD4.7JS(1)-T1-AZ meets industry standards.
7.What is the process for return or replacement of RD4.7JS(1)-T1-AZ?
All RD4.7JS(1)-T1-AZ units undergo pre-shipment inspection (PSI). If there is an issue with RD4.7JS(1)-T1-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 RD4.7JS(1)-T1-AZ part is unused and in its original packaging.
Return procedure for RD4.7JS(1)-T1-AZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
RD4.7JS(1)-T1-AZ Tags
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