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Renesas RD47E-T4-AZ
- Part No.:
- RD47E-T4-AZ
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
RD47E-T4-AZ.pdf
- Description:
- DIODE ZENER
- Quantity:
- Payment:
- Shipping:
Inventory:5,000
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Product details
Overview
RD47E-T4-AZ from NEC Corporation is a silicon planar Zener diode in SC-76 (SSP) package, rated for 47 V nominal Zener voltage at 5 mA test current, with 5% tolerance and 500 mW power dissipation, commonly used for voltage regulation and reference in low-power analog circuits.
For engineers reviewing the RD47E-T4-AZ datasheet, RD47E-T4-AZ pinout, RD47E-T4-AZ application, or RD47E-T4-AZ equivalent, key selection criteria include Zener voltage accuracy, temperature coefficient, dynamic impedance, maximum power rating, and taping configuration for automated assembly.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable voltage across its terminals under specified current conditions. It exhibits a typical dynamic impedance of 120 Ω at 5 mA and a temperature coefficient of +0.07 %/°C near 47 V, supporting precision biasing in sensor interfaces and power supply feedback networks.
The SC-76 (SSP) surface-mount package enables high-density PCB layout with solderable terminations on two leads. The -T4 taping designation indicates a specific orientation and reel configuration compliant with NEC's SC-76 tape-and-reel standard for pick-and-place compatibility.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 47 V ±5% at IZ = 5 mA - defines regulated output voltage in shunt regulator designs |
| Power Dissipation (PZM) | 500 mW - maximum continuous power handling at TA = 25°C, derates linearly above |
| Dynamic Impedance (ZZT) | 120 Ω typical at IZ = 5 mA - determines voltage regulation sensitivity to current variation |
| Temperature Coefficient (TC) | +0.07 %/°C - quantifies VZ drift per degree Celsius near nominal operating point |
| Test Current (IZT) | 5 mA - standardized condition for specifying VZ and ZZT per JEDEC JESD24 |
| Package | SC-76 (SSP) - 2-pin SMD package with 1.3 mm × 0.8 mm footprint and 0.55 mm height |
Pinout & Package
SC-76 (SSP) is a two-terminal surface-mount package with anode and cathode leads formed on opposite ends of a rectangular body. Cathode is marked by a band on the device top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (A) | Forward conduction terminal | Connected to lower potential side in Zener operation; reverse-biased during regulation |
| Cathode (K) | Reverse breakdown terminal | Connected to higher potential side; voltage referenced to this node during regulation |
Key Features
| Feature | Design Value |
|---|---|
| Stable 47 V reference | Enables accurate voltage clamping in 50 V-class power rails without external compensation |
| Low dynamic impedance | Minimizes output voltage deviation under load transients in feedback divider networks |
| SC-76 (SSP) packaging | Supports 0.5 mm pitch pick-and-place placement and reflow-compatible solder joint formation |
| ±5% VZ tolerance | Meets industrial-grade accuracy requirements for non-critical reference applications |
Applications
| Voltage Reference for Op-Amp Biasing | Overvoltage Clamp in Sensor Signal Conditioning |
|---|---|
Use Scenario: Providing stable DC bias to input stages of instrumentation amplifiers in data acquisition systems. IC Role / Device Role / Timing Role: Zener diode acting as a passive voltage reference source for op-amp common-mode level setting. Use Value: Delivers 47 V reference with <120 Ω dynamic impedance, reducing gain error induced by supply ripple. | Use Scenario: Protecting ADC input pins from transient overvoltage events in industrial 4–20 mA loop receivers. IC Role / Device Role / Timing Role: Shunt clamping element limiting signal swing to safe levels before analog front-end circuitry. Use Value: Clamps excursions above 49.35 V (47 V × 1.05) with fast response, preserving ADC integrity. |
| Feedback Divider in Switch-Mode Power Supply | Reference Node Stabilization in Precision DAC Circuits |
Use Scenario: Setting output voltage in isolated flyback converters using optocoupler feedback networks. IC Role / Device Role / Timing Role: Zener reference defining upper threshold of resistive divider connected to TL431 or similar controller. Use Value: Maintains ±5% output regulation accuracy across line/load variations due to stable VZ. | Use Scenario: Establishing fixed reference potential for R-2R ladder networks in 12-bit DAC modules. IC Role / Device Role / Timing Role: Passive voltage anchor stabilizing DAC output buffer bias point against supply noise. Use Value: Limits reference drift to <0.07 %/°C, contributing to <0.5 LSB thermal error in ambient range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX55-C47 (ON Semiconductor) | Same 47 V ±5%, 500 mW rating, but in DO-35 glass package with axial leads | Requires through-hole mounting; unsuitable for high-density SMT production | Select when legacy board design or manual prototyping favors axial components |
| MMSZ47ET1G (ON Semiconductor) | Identical SC-76 (SOD-123) package, same 47 V ±5%, 500 mW, but with tighter ZZT (100 Ω max) | Offers marginally better regulation stability under varying load currents | Prefer for new SMT designs where lower dynamic impedance improves feedback accuracy |
Compared with BZX55-C47 and MMSZ47ET1G, RD47E-T4-AZ provides SC-76 SMT compatibility and NEC-specific taping (-T4), making it optimal for NEC-aligned production lines requiring documented tape orientation and reel compliance.
Availability
RD47E-T4-AZ is available at Aetrix Electronics and suitable for voltage reference, overvoltage protection, and feedback divider applications requiring stable component supply and consistent tape-and-reel delivery for automated assembly.
Supply support for RD47E-T4-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
NEC Corporation was a Japanese multinational electronics company known for semiconductor innovation, particularly in discrete devices and memory technologies prior to its integration into Renesas Electronics.
RD47E-T4-AZ belongs to NEC's legacy Zener diode product line designed for industrial-grade voltage stabilization in compact SMT layouts, emphasizing taping consistency and thermal reliability.
FAQ
What is the Zener voltage tolerance of RD47E-T4-AZ?
The RD47E-T4-AZ has a Zener voltage tolerance of ±5% at 5 mA test current, meaning its actual breakdown voltage falls between 44.65 V and 49.35 V under standard test conditions. This tolerance is specified per NEC's original datasheet and applies directly to each RD47E-T4-AZ unit shipped in SC-76 tape-and-reel format.
Is RD47E-T4-AZ compatible with reflow soldering processes?
Yes, RD47E-T4-AZ uses an SC-76 (SSP) package with solderable metallized terminations rated for standard lead-free reflow profiles (J-STD-020). Its 0.55 mm profile and thermal mass allow uniform heating without cracking, and the RD47E-T4-AZ taping configuration supports automated placement prior to reflow.
Does RD47E-T4-AZ have a specified temperature coefficient?
Yes, RD47E-T4-AZ has a positive temperature coefficient of +0.07 %/°C near its 47 V operating point, indicating that its Zener voltage increases by approximately 33 mV per °C rise in junction temperature. This value is measured and guaranteed for RD47E-T4-AZ units within the manufacturer's published thermal limits.
What does the "-T4" suffix indicate in RD47E-T4-AZ?
The "-T4" suffix in RD47E-T4-AZ denotes NEC's specific tape-and-reel orientation standard for SC-76 (SSP) devices, defining carrier tape pocket depth, cover tape adhesion, and device rotation direction on the reel. This ensures compatibility with NEC-aligned pick-and-place equipment and distinguishes RD47E-T4-AZ from other taping variants like -T1 or -T2.
Can RD47E-T4-AZ replace a 1N4747A in an existing design?
RD47E-T4-AZ matches the 1N4747A's 47 V ±5% rating and 500 mW power dissipation but differs in package (SC-76 vs. DO-41) and thermal characteristics. While electrically comparable, RD47E-T4-AZ requires PCB footprint redesign and reflow validation; direct substitution is not recommended without layout and thermal review of the RD47E-T4-AZ implementation.
RD47E-T4-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:
- -
RD47E-T4-AZ FAQ
1.How can I place an order for RD47E-T4-AZ through Aetrix?
Please submit a Request for Quotation (RFQ) for RD47E-T4-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 RD47E-T4-AZ reliable?
The price and inventory of RD47E-T4-AZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RD47E-T4-AZ is usually 5 days.
3.What payment methods are accepted for RD47E-T4-AZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RD47E-T4-AZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RD47E-T4-AZ?
RD47E-T4-AZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RD47E-T4-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 RD47E-T4-AZ?
For technical support, including RD47E-T4-AZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RD47E-T4-AZ requirements.
6.How does Aetrix verify that RD47E-T4-AZ is sourced from the original manufacturer or authorized distributors?
All RD47E-T4-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 RD47E-T4-AZ meets industry standards.
7.What is the process for return or replacement of RD47E-T4-AZ?
All RD47E-T4-AZ units undergo pre-shipment inspection (PSI). If there is an issue with RD47E-T4-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 RD47E-T4-AZ part is unused and in its original packaging.
Return procedure for RD47E-T4-AZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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