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Renesas RD4.7JS-T1
- Part No.:
- RD4.7JS-T1
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
RD4.7JS-T1.pdf
- Description:
- DIODE ZENER 4.7V
- Quantity:
- Payment:
- Shipping:
Inventory:28,000
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Product details
Overview
RD4.7JS-T1 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 dynamic impedance Zz = 10 Ω at Iz = 5 mA - used for precision voltage reference and waveform clipping in analog signal conditioning circuits.
For engineers reviewing the RD4.7JS-T1 datasheet, RD4.7JS-T1 pinout, RD4.7JS-T1 application, or RD4.7JS-T1 equivalent, key selection criteria include its E24-standardized Zener voltage tolerance (±5% for AB1 suffix), low knee impedance (Zzk = 800 Ω), junction temperature rating of 175 °C, and suitability for constant-voltage regulation in space-constrained consumer and industrial power supplies.
Technical Context
This device operates as a two-terminal voltage-reference element relying on controlled reverse-biased avalanche breakdown. Its DHD (Double Heatsink Diode) construction within the DO-34 package enables 400 mW steady-state dissipation and 2.4 W surge capability (t = 10 µs), with thermal resistance Rth-JA ≈ 375 °C/W on minimal copper area.
Electrical behavior is defined by tight Vz distribution across AB1/AB2/AB3 suffix variants (e.g., RD4.7JS-AB1: 4.42–4.61 V), low IR ≤ 100 µA at VR = 0.5 V, and stable temperature coefficient γz ≈ +0.02 %/°C near 4.7 V - confirming its use in low-drift biasing networks rather than high-precision metrology.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage Vz | 4.42–4.61 V (AB1 suffix, Iz = 5 mA); defines nominal regulation point with ±4.5% tolerance for stable DC reference generation |
| Power Dissipation P | 400 mW at TA = 25 °C; sets maximum continuous DC load in linear regulator or shunt feedback paths |
| Dynamic Impedance Zz | 10 Ω at Iz = 5 mA; ensures minimal output voltage variation under changing load current in shunt regulation |
| Reverse Current IR | ≤ 100 µA at VR = 0.5 V; guarantees low leakage in standby or high-impedance sensing nodes |
| Noise Level en | 50 µV (10–500 kHz); supports low-noise analog front-ends where reference ripple must be minimized |
| Junction Temperature Tj | 175 °C max; allows operation in thermally demanding environments such as enclosed power adapters |
| Surge Power PRSM | 2.4 W for 10 µs pulse; provides transient overvoltage clamping capability without failure |
Pinout & Package
RD4.7JS-T1 uses the DO-34 (JEDEC) axial glass package: 2.4 mm max body length, 25° cathode band marking in blue, and 0.4 mm diameter leads. Cathode is identified by a single blue band near one lead end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Reference ground node | Connected to circuit common when used in reverse-biased Zener mode; carries full load current in shunt configuration |
| Cathode | Zener breakdown terminal / Output reference node | Provides stabilized voltage relative to anode; polarity must be observed to avoid forward conduction or damage |
Key Features
| Feature | Design Value |
|---|---|
| DO-34 glass seal | Hermetic encapsulation ensuring long-term parameter stability and moisture resistance in humid environments |
| Sharp breakdown characteristic | Low knee impedance (Zzk = 800 Ω) enables clean transition into regulation, reducing ambiguity in threshold detection circuits |
| Low noise performance | 50 µV RMS noise (10–500 kHz) makes it suitable for audio biasing and sensor excitation where ripple coupling must be avoided |
| E24-standard Vz grading | AB1/AB2/AB3 suffixes provide three tightly binned voltage options per nominal value, enabling design margin optimization |
| DHD thermal construction | Double heatsink layout improves heat transfer from junction to leads, supporting higher pulse power handling than standard DO-34 diodes |
Applications
| Power Supply Reference | Waveform Clipping |
|---|---|
|
Use Scenario: Providing stable 4.7 V reference for op-amp biasing and ADC reference buffers in battery-powered instrumentation. IC Role / Device Role / Timing Role: Shunt voltage reference establishing precise DC offset and common-mode level. Use Value: Maintains <±1% output deviation across –40 to +85 °C ambient due to low γz and stable Zz, eliminating need for trimming resistors. |
Use Scenario: Limiting AC signal peaks to ±4.7 V in audio line drivers and sensor signal conditioners. IC Role / Device Role / Timing Role: Bidirectional clamping element protecting downstream inputs from overvoltage transients. Use Value: Sharp breakdown onset and 2.4 W surge rating suppress >10 µs spikes without degradation, preserving signal integrity. |
| Constant Current Source | Overvoltage Protection |
|
Use Scenario: Setting fixed emitter current in BJT-based current mirrors for analog computing blocks. IC Role / Device Role / Timing Role: Voltage-setting element in series with base resistor to define IE = (VZ − VBE)/RB. Use Value: Low Zz (10 Ω) minimizes current error sensitivity to supply variations, improving mirror accuracy to ±2%. |
Use Scenario: Safeguarding microcontroller I/O pins against accidental 12 V connection in industrial control panels. IC Role / Device Role / Timing Role: Standby clamping diode conducting only during fault conditions above 4.7 V. Use Value: 175 °C Tj rating and 100 µA IR ensure reliable fail-safe operation without thermal runaway or leakage-induced false triggers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4732A | Vz = 4.7 V ±5%, P = 1 W, DO-41 package (5.2 mm length), Zz = 14 Ω | Higher power and larger footprint; better for high-current shunt regulation but unsuitable for ultra-compact layouts | Select when >400 mW continuous dissipation is required and board space permits larger axial package |
| BZX55C4V7 | Vz = 4.7 V ±5%, P = 500 mW, DO-35 package (4.5 mm length), Zz = 70 Ω | Higher Zz degrades regulation accuracy; DO-35 glass offers similar reliability but less surge robustness (PRSM = 1.5 W) | Choose only if DO-35 is already standardized in production and 70 Ω Zz meets system error budget |
Compared with RD4.7JS-T1, 1N4732A offers higher power headroom at the cost of size and thermal resistance, while BZX55C4V7 trades off regulation precision and surge immunity for minor cost savings - making RD4.7JS-T1 optimal for compact, low-noise, medium-power analog references.
Availability
RD4.7JS-T1 is available at Aetrix Electronics and suitable for constant voltage regulation, waveform clipping, and overvoltage protection applications requiring stable component supply in consumer electronics, industrial control modules, and test equipment.
Supply support for RD4.7JS-T1 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 specializing in microcontrollers, analog, and power devices, with roots in NEC and Hitachi semiconductor divisions.
The RD4.7JS-T1 belongs to the RDx.xJS Zener diode family designed for general-purpose voltage reference and protection in Standard-grade applications including office equipment, audio systems, and industrial automation.
FAQ
What is the Zener voltage tolerance of RD4.7JS-T1?
The RD4.7JS-T1 with AB1 suffix has a Zener voltage range of 4.42 V to 4.61 V at Iz = 5 mA, corresponding to ±4.5% tolerance around the nominal 4.7 V rating. This tight binning supports accurate voltage setting without external calibration in production designs.
Can RD4.7JS-T1 be used in surface-mount designs?
No - RD4.7JS-T1 is manufactured exclusively in the through-hole DO-34 axial glass package and lacks SMD-compatible variants. For surface-mount equivalents, consider Renesas' NSZ series or third-party SOD-123 Zeners with comparable Vz and Zz specs.
What is the maximum surge power RD4.7JS-T1 can withstand?
RD4.7JS-T1 supports a non-repetitive surge reverse power of 2.4 W for pulse width t = 10 µs, as specified in Figure 9 of the datasheet. This enables robust transient suppression in power supply input stages without derating requirements for short-duration spikes.
Does RD4.7JS-T1 meet RoHS requirements?
Yes - RD4.7JS-T1 complies with EU RoHS Directive requirements for restricted substances. Renesas confirms environmental compliance for this part in accordance with applicable regulations, and material declarations are available upon request via their official support portal.
How does the noise performance of RD4.7JS-T1 compare to other 4.7 V Zeners?
RD4.7JS-T1 delivers 50 µV RMS noise (10–500 kHz), significantly lower than typical 4.7 V Zeners like 1N4732A (≈100 µV). This low-noise trait stems from its DHD construction and optimized junction design, making RD4.7JS-T1 preferred in audio and precision analog signal chains.
RD4.7JS-T1 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-T1 FAQ
1.How can I place an order for RD4.7JS-T1 through Aetrix?
Please submit a Request for Quotation (RFQ) for RD4.7JS-T1 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-T1 reliable?
The price and inventory of RD4.7JS-T1 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-T1 is usually 5 days.
3.What payment methods are accepted for RD4.7JS-T1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RD4.7JS-T1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RD4.7JS-T1?
RD4.7JS-T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RD4.7JS-T1 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-T1?
For technical support, including RD4.7JS-T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RD4.7JS-T1 requirements.
6.How does Aetrix verify that RD4.7JS-T1 is sourced from the original manufacturer or authorized distributors?
All RD4.7JS-T1 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-T1 meets industry standards.
7.What is the process for return or replacement of RD4.7JS-T1?
All RD4.7JS-T1 units undergo pre-shipment inspection (PSI). If there is an issue with RD4.7JS-T1, 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-T1 part is unused and in its original packaging.
Return procedure for RD4.7JS-T1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
RD4.7JS-T1 Tags
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MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
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MM5Z5V1ST1G
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SMAJ4744A-TP
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SMAZ12-13-F
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