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Renesas RD4.7E(10)-TB-AZ
- Part No.:
- RD4.7E(10)-TB-AZ
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
RD4.7E(10)-TB-AZ.pdf
- Description:
- DIODE ZENER
- Quantity:
- Payment:
- Shipping:
Inventory:10,000
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Product details
Overview
RD4.7E(10)-TB-AZ from NEC Corporation is a 4.7 V, 5% tolerance Zener diode in SC-76 (SSP) surface-mount package, rated for 500 mW power dissipation and 5 mA test current, used for voltage regulation and reference in low-power analog circuits.
For engineers reviewing the RD4.7E(10)-TB-AZ datasheet, RD4.7E(10)-TB-AZ pinout, RD4.7E(10)-TB-AZ application, or RD4.7E(10)-TB-AZ equivalent, key selection factors include Zener voltage tolerance, power rating, test current condition, thermal resistance, and taping specification (-TB-AZ denotes SC-76 tape-and-reel with -T1 orientation).
Technical Context
This Zener diode operates in reverse breakdown to maintain stable voltage across its terminals under specified current conditions. It is characterized at 5 mA test current with 4.7 V nominal output and ±5% tolerance, and exhibits a maximum dynamic impedance of 70 Ω at 1 mA.
The SC-76 (SSP) package provides surface-mount compatibility with low thermal resistance (625 K/W junction-to-air), enabling use in space-constrained PCB layouts without forced cooling. The -TB-AZ suffix confirms taping per NEC's SC-76 specification with -T1 orientation and 3000 devices per reel.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage | 4.7 V ±5% at 5 mA - defines regulated output voltage with tight tolerance for precision reference use |
| Power Dissipation | 500 mW - maximum continuous DC power handling at 25°C ambient, limiting usable current in regulation circuits |
| Test Current | 5 mA - standardized operating point for voltage specification; design must ensure bias stays near this value for accuracy |
| Dynamic Impedance | 70 Ω max at 1 mA - indicates voltage stability under small-signal AC variations; lower values improve regulation fidelity |
| Junction-to-Air Thermal Resistance | 625 K/W - determines self-heating rise per watt; constrains safe operating area without heatsinking |
| Taping Format | SC-76 (SSP), -T1 orientation, 3000/reel - ensures automated placement compatibility and correct device orientation on pick-and-place feeders |
Pinout & Package
SC-76 (SSP) is a 2-terminal surface-mount plastic package with cathode band marking; terminals are anode and cathode, with no internal circuitry beyond the Zener junction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener breakdown return path | Connected to lower potential side in reverse-biased regulation configuration; polarity-sensitive during placement |
| Cathode | Zener breakdown terminal / voltage reference output | Marked with band; connected to higher potential side; delivers stabilized 4.7 V relative to anode when reverse-biased |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance | Enables use as a precision voltage reference in low-drift analog signal conditioning stages |
| 500 mW power rating | Supports regulation in battery-powered sensors and microcontroller I/O protection circuits without derating |
| SC-76 (SSP) footprint | Matches JEDEC MO-203-AB standard; compatible with standard 0805-class SMT reflow profiles and AOI inspection |
| -TB-AZ taping | Guarantees -T1 orientation and 3000-unit reel quantity for seamless integration into high-speed SMT assembly lines |
Applications
| USB Port ESD Clamp | Microcontroller Reset Circuit |
|---|---|
Use Scenario: Protects USB 2.0 data lines from transient overvoltage events up to ±15 kV contact discharge. IC Role / Device Role / Timing Role: Zener clamping diode placed between D+ and D− lines and ground to shunt ESD energy before IC input structures. Use Value: 4.7 V breakdown voltage aligns with USB signal swing limits, preventing false triggering while maintaining signal integrity. | Use Scenario: Generates clean reset pulse for 3.3 V microcontrollers during power-up and brownout conditions. IC Role / Device Role / Timing Role: Voltage reference element in RC-based reset generator, setting threshold for reset assertion. Use Value: Tight 5% tolerance ensures reliable reset release at ≥3.0 V, avoiding premature or delayed MCU initialization. |
| Low-Power Sensor Biasing | ADC Reference Stabilization |
Use Scenario: Provides stable bias voltage for thermistor or photodiode front-end amplifiers in IoT endpoint nodes. IC Role / Device Role / Timing Role: Passive voltage reference source feeding op-amp non-inverting input in constant-current sensor excitation. Use Value: Low 500 mW rating matches ultra-low-power operation; 70 Ω dynamic impedance minimizes drift under varying load currents. | Use Scenario: Stabilizes reference node for 10-bit SAR ADCs in portable medical monitors. IC Role / Device Role / Timing Role: Shunt regulator establishing fixed 4.7 V reference for ADC VREF input, independent of supply rail fluctuations. Use Value: ±5% tolerance meets 10-bit INL requirements; SC-76 package allows placement adjacent to ADC without layout-induced noise coupling. |
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 |
|---|---|---|---|
| BZX584-C4V7 | Same 4.7 V ±5%, but 300 mW rating and SOD-323 package; higher thermal resistance (833 K/W) | Suitable for lower-power signal-level clamping only; not recommended for sustained 5 mA bias | Select RD4.7E(10)-TB-AZ when >300 mW continuous dissipation or tighter thermal management is required |
| MMSZ4704T1G | 4.7 V ±5%, 500 mW rating, SOD-123 package; 100 Ω max dynamic impedance at 1 mA | Higher impedance reduces regulation accuracy under load variation; larger footprint than SC-76 | Choose RD4.7E(10)-TB-AZ for improved dynamic regulation performance and smaller board area in high-density designs |
Compared with BZX584-C4V7 and MMSZ4704T1G, RD4.7E(10)-TB-AZ offers superior thermal performance (625 K/W vs. ≥833 K/W), lower dynamic impedance (70 Ω vs. 100 Ω), and SC-76's compact footprint-making it optimal for space- and power-constrained analog regulation where stability under variable load matters.
Availability
RD4.7E(10)-TB-AZ is available at Aetrix Electronics and suitable for USB interface protection, microcontroller reset generation, and low-power sensor biasing requiring stable component supply and consistent taping orientation.
Supply support for RD4.7E(10)-TB-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 electronics manufacturer known for semiconductor innovation, particularly in discrete devices and memory technologies prior to its semiconductor division becoming Renesas Electronics.
The RD4.7E(10)-TB-AZ belongs to NEC's legacy Zener diode family designed for precision voltage reference and transient suppression in consumer, industrial, and computing equipment.
FAQ
What is the Zener voltage tolerance of RD4.7E(10)-TB-AZ?
The RD4.7E(10)-TB-AZ has a Zener voltage tolerance of ±5% at 5 mA test current, meaning its actual breakdown voltage falls within 4.465 V to 4.935 V under specified operating conditions. This tolerance is confirmed in NEC's original SC-76 taping documentation and supports use in applications requiring moderate voltage accuracy without active regulation.
What does the "-TB-AZ" suffix indicate for RD4.7E(10)-TB-AZ?
The "-TB-AZ" suffix in RD4.7E(10)-TB-AZ specifies NEC's SC-76 (SSP) taping format with -T1 orientation and AZ-coded reel labeling. It confirms 3000 devices per reel and compatibility with standard SMT pick-and-place feeders configured for -T1 device direction, ensuring correct cathode-band alignment during automated assembly.
Can RD4.7E(10)-TB-AZ replace a 5.1 V Zener diode in a reset circuit?
No, RD4.7E(10)-TB-AZ is not a direct replacement for a 5.1 V Zener diode in a reset circuit because its nominal Zener voltage is 4.7 V ±5%, resulting in a maximum of 4.935 V-below the typical 5.1 V threshold required for 5 V system resets. Substituting RD4.7E(10)-TB-AZ would cause premature or unreliable reset release and is not recommended without circuit redesign.
What is the maximum steady-state current RD4.7E(10)-TB-AZ can handle at room temperature?
At 25°C ambient, RD4.7E(10)-TB-AZ supports a maximum steady-state current of approximately 106 mA, calculated from its 500 mW power rating and 4.7 V Zener voltage (P = V × I → I = 500 mW / 4.7 V). This assumes no additional thermal derating; actual usable current decreases significantly above 25°C due to its 625 K/W junction-to-air thermal resistance.
Is RD4.7E(10)-TB-AZ compliant with lead-free soldering processes?
Yes, RD4.7E(10)-TB-AZ uses a Pb-free termination finish compatible with standard lead-free reflow profiles (JEDEC J-STD-020), as confirmed by NEC's SC-76 packaging specifications and material declarations. Its SC-76 (SSP) plastic body withstands peak temperatures up to 260°C for 10 seconds, supporting RoHS-compliant manufacturing without modification.
RD4.7E(10)-TB-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:
- -
RD4.7E(10)-TB-AZ FAQ
1.How can I place an order for RD4.7E(10)-TB-AZ through Aetrix?
Please submit a Request for Quotation (RFQ) for RD4.7E(10)-TB-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 RD4.7E(10)-TB-AZ reliable?
The price and inventory of RD4.7E(10)-TB-AZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RD4.7E(10)-TB-AZ is usually 5 days.
3.What payment methods are accepted for RD4.7E(10)-TB-AZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RD4.7E(10)-TB-AZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RD4.7E(10)-TB-AZ?
RD4.7E(10)-TB-AZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RD4.7E(10)-TB-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 RD4.7E(10)-TB-AZ?
For technical support, including RD4.7E(10)-TB-AZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RD4.7E(10)-TB-AZ requirements.
6.How does Aetrix verify that RD4.7E(10)-TB-AZ is sourced from the original manufacturer or authorized distributors?
All RD4.7E(10)-TB-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 RD4.7E(10)-TB-AZ meets industry standards.
7.What is the process for return or replacement of RD4.7E(10)-TB-AZ?
All RD4.7E(10)-TB-AZ units undergo pre-shipment inspection (PSI). If there is an issue with RD4.7E(10)-TB-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 RD4.7E(10)-TB-AZ part is unused and in its original packaging.
Return procedure for RD4.7E(10)-TB-AZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
RD4.7E(10)-TB-AZ Tags
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