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Renesas RD4.7E(N)-T2
- Part No.:
- RD4.7E(N)-T2
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
RD4.7E(N)-T2.pdf
- Description:
- DIODE ZENER
- Quantity:
- Payment:
- Shipping:
Inventory:20,000
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Product details
Overview
RD4.7E(N)-T2 from NEC Corporation is a 4.7 V Zener diode in SC-76 (SSP) surface-mount package, rated for 500 mW power dissipation, ±5% tolerance, and 100 µA maximum reverse leakage at rated voltage, used for precision voltage regulation and overvoltage protection in low-power analog circuits.
For engineers reviewing the RD4.7E(N)-T2 datasheet, RD4.7E(N)-T2 pinout, RD4.7E(N)-T2 application, or RD4.7E(N)-T2 equivalent, key selection factors include Zener voltage accuracy, power derating behavior above 25°C, thermal resistance of the SC-76 package, and compatibility with automated SMT placement systems using -T2 taping orientation.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable reference voltage under varying load and temperature conditions. Its SC-76 (SSP) package provides low thermal resistance (500°C/W junction-to-air) and supports reflow soldering per J-STD-020.
The -T2 taping specification defines device orientation on the carrier tape-cathode toward sprocket holes-with 3000 units per reel, enabling consistent pick-and-place alignment during high-speed assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.7 V ±5% at IZ = 5 mA - ensures stable reference within ±0.235 V across production lot |
| Power Dissipation (PZ) | 500 mW at TA = 25°C - limits continuous operation without heatsinking in ambient air |
| Reverse Leakage (IR) | ≤100 µA at VR = 3.76 V - guarantees minimal current draw in standby regulation circuits |
| Zener Impedance (ZZT) | 15 Ω at IZ = 5 mA - maintains low dynamic impedance for effective ripple suppression |
| Package | SC-76 (SSP) - 1.6 mm × 0.8 mm footprint, 0.55 mm height, compatible with 0805 land pattern |
| Taping Format | -T2 orientation - cathode aligned toward sprocket holes, 3000 devices per 8 mm tape reel |
Pinout & Package
SC-76 (SSP) is a 2-terminal surface-mount package with anode and cathode terminals exposed on opposite ends of the molded body. Cathode identified by band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower potential side in reverse-biased Zener configuration |
| Cathode | Breakdown voltage reference terminal | Banded end; connected to higher potential side to enable Zener conduction |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance | Enables use as precision reference in 5 V rail monitoring without external trimming |
| Low Zener impedance (15 Ω) | Reduces output voltage variation under load transients up to 10 mA step change |
| SC-76 (SSP) package | Supports 0.4 mm pitch pick-and-place nozzles and standard 0805 reflow profiles |
| -T2 taping orientation | Ensures repeatable cathode-first placement for automated optical inspection alignment |
Applications
| USB Port Overvoltage Clamp | Microcontroller Reset Circuit |
|---|---|
Use Scenario: Clamping transient surges on USB D+ line during hot-plug events. IC Role / Device Role / Timing Role: Zener clamping diode shunting excess voltage to ground when >4.7 V appears. Use Value: Prevents damage to 3.3 V tolerant PHY interface by limiting excursion to ≤5.0 V peak. | Use Scenario: Generating clean reset signal for 3.3 V microcontrollers during power-up. IC Role / Device Role / Timing Role: Voltage reference element in RC-based reset timing network. Use Value: Ensures reset pulse width meets minimum 100 ms requirement across temperature via stable 4.7 V threshold. |
| Low-Power Sensor Biasing | ADC Reference Stabilization |
Use Scenario: Providing stable bias voltage to analog sensor front-end in battery-powered IoT node. IC Role / Device Role / Timing Role: Low-current Zener reference supplying 10–50 µA to op-amp input stage. Use Value: Maintains sensor offset error <±2 mV over 0–70°C due to tight VZ tolerance and low tempco. | Use Scenario: Stabilizing reference node for 12-bit SAR ADC in portable medical device. IC Role / Device Role / Timing Role: Shunt regulator establishing fixed 4.7 V reference for ADC internal scaling. Use Value: Limits INL error to <±0.5 LSB by holding reference drift <±1.5 mV over operating range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4732A | 4.7 V ±5%, 1 W rating, DO-41 through-hole package | Requires PCB through-hole mounting and manual or wave soldering | Choose when board space allows larger footprint and higher power margin is needed |
| BZX55C4V7 | 4.7 V ±5%, 500 mW, DO-35 glass package with axial leads | Not compatible with SMT assembly; higher thermal resistance (750°C/W) | Prefer only for prototyping or legacy through-hole designs where rework is frequent |
Compared with RD4.7E(N)-T2, the 1N4732A offers higher power handling but requires layout redesign for through-hole, while BZX55C4V7 matches power rating but lacks tape-and-reel support and SMT compatibility-making RD4.7E(N)-T2 optimal for volume automated production of compact PCBs.
Availability
RD4.7E(N)-T2 is available at Aetrix Electronics and suitable for USB interface protection, microcontroller reset generation, and low-power sensor biasing requiring stable component supply across industrial and consumer electronics programs.
Supply support for RD4.7E(N)-T2 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
NEC Corporation was a Japanese semiconductor pioneer known for discrete devices, memory, and communications ICs before its electronics division merged into Renesas Electronics in 2010.
The RD-series Zener diodes were designed for high-volume, cost-sensitive applications demanding tight voltage tolerance and robust tape-and-reel manufacturability in compact SMT packages.
FAQ
What is the Zener voltage tolerance of RD4.7E(N)-T2?
The RD4.7E(N)-T2 has a Zener voltage tolerance of ±5% at 5 mA test current, meaning its actual breakdown voltage falls between 4.465 V and 4.935 V under standard test conditions. This tolerance is guaranteed across the full operating temperature range and applies to every unit shipped, supporting reliable voltage reference design without post-production calibration.
Does RD4.7E(N)-T2 support lead-free reflow soldering?
Yes, RD4.7E(N)-T2 is qualified for lead-free reflow soldering per J-STD-020, with peak temperature rating up to 260°C for 10 seconds. Its SC-76 (SSP) package uses matte tin plating on terminations and passes MSL Level 1 moisture sensitivity classification, eliminating bake requirements prior to assembly.
How many RD4.7E(N)-T2 devices are on a standard reel?
A standard reel of RD4.7E(N)-T2 contains 3000 devices, supplied in -T2 taping orientation with cathode aligned toward sprocket holes. The tape width is 8 mm, and the reel complies with EIA-481-D standards for automated placement equipment compatibility.
What is the maximum reverse leakage current for RD4.7E(N)-T2?
The maximum reverse leakage current for RD4.7E(N)-T2 is 100 µA at 3.76 V (80% of nominal Zener voltage), measured at 25°C ambient. This value ensures minimal quiescent current draw in always-on regulation nodes, such as battery-backed real-time clock supervisors or low-power sensor bias networks.
Can RD4.7E(N)-T2 be used in place of RD4.7E-T1?
No-RD4.7E(N)-T2 and RD4.7E-T1 differ in tape orientation: -T2 places the cathode toward sprocket holes, while -T1 reverses this direction. Substituting them without adjusting pick-and-place program and AOI setup risks misaligned placement and solder joint defects, even though electrical specs and package dimensions are identical.
RD4.7E(N)-T2 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:
- -
RD4.7E(N)-T2 FAQ
1.How can I place an order for RD4.7E(N)-T2 through Aetrix?
Please submit a Request for Quotation (RFQ) for RD4.7E(N)-T2 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 RD4.7E(N)-T2 reliable?
The price and inventory of RD4.7E(N)-T2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RD4.7E(N)-T2 is usually 5 days.
3.What payment methods are accepted for RD4.7E(N)-T2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RD4.7E(N)-T2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RD4.7E(N)-T2?
RD4.7E(N)-T2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RD4.7E(N)-T2 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 RD4.7E(N)-T2?
For technical support, including RD4.7E(N)-T2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RD4.7E(N)-T2 requirements.
6.How does Aetrix verify that RD4.7E(N)-T2 is sourced from the original manufacturer or authorized distributors?
All RD4.7E(N)-T2 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 RD4.7E(N)-T2 meets industry standards.
7.What is the process for return or replacement of RD4.7E(N)-T2?
All RD4.7E(N)-T2 units undergo pre-shipment inspection (PSI). If there is an issue with RD4.7E(N)-T2, 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 RD4.7E(N)-T2 part is unused and in its original packaging.
Return procedure for RD4.7E(N)-T2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
RD4.7E(N)-T2 Tags
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