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Renesas RD4.3E-T4-AZ
- Part No.:
- RD4.3E-T4-AZ
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
RD4.3E-T4-AZ.pdf
- Description:
- DIODE ZENER
- Quantity:
- Payment:
- Shipping:
Inventory:13,700
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Product details
Overview
RD4.3E-T4-AZ from NEC Corporation is a silicon planar Zener diode in SC-76 (SSP) package, rated for 4.3 V nominal Zener voltage at 5 mA test current, with 5% tolerance and 500 mW power dissipation, used for voltage regulation and reference in low-power analog circuits.
For engineers reviewing the RD4.3E-T4-AZ datasheet, RD4.3E-T4-AZ pinout, RD4.3E-T4-AZ application, or RD4.3E-T4-AZ equivalent, key selection factors include Zener voltage accuracy, temperature coefficient, dynamic impedance, reverse leakage current, and taping configuration (-T4) for automated assembly.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable voltage across its terminals under varying load and supply conditions. It features a silicon planar construction with controlled doping profile to achieve tight voltage tolerance and predictable temperature coefficient.
The SC-76 (SSP) surface-mount package supports high-density PCB layouts and reflow soldering. The -T4 taping designation indicates a specific carrier tape orientation and reel configuration compliant with NEC's SC-76 taping specification for automated pick-and-place placement.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.3 V ±5% at IZ = 5 mA - defines nominal regulation point with bounded error for precision biasing |
| Power Dissipation (PZ) | 500 mW - maximum steady-state power handling at TA = 25°C, derates linearly above ambient |
| Zener Impedance (ZZT) | ≤ 70 Ω at IZ = 1 mA - limits output voltage variation under small-signal load changes |
| Reverse Leakage (IR) | ≤ 1 µA at VR = 1 V - ensures minimal parasitic current in standby or high-impedance nodes |
| Temperature Coefficient | Typ. +2.5 mV/°C - quantifies VZ drift over operating temperature range for stability-critical references |
| Taping Format | -T4 - specifies carrier tape orientation, pocket pitch, and reel standard per NEC SC-76 specification |
Pinout & Package
SC-76 (SSP) is a 2-terminal surface-mount plastic package with cathode band marking. Dimensions: 1.6 × 0.8 × 0.6 mm (L × W × H), standard JEDEC-compliant footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-voltage reference node | Connected to circuit ground or lower-potential rail when used in shunt regulation |
| Cathode | Reverse-biased Zener terminal / regulated output node | Provides stable 4.3 V reference relative to anode; marked by band on package body |
Key Features
| Feature | Design Value |
|---|---|
| Low dynamic impedance | Ensures <10 mV output variation for ±1 mA load current shifts in reference designs |
| Stable temperature coefficient | +2.5 mV/°C typical enables predictable VZ drift compensation in wide-temperature industrial sensors |
| SC-76 (SSP) package | Supports 0.5 mm pitch automated placement and IR reflow without tombstoning or misalignment |
| -T4 taping compliance | Guarantees consistent pocket orientation and feed reliability in high-speed SMT lines using NEC-standard reels |
Applications
| Portable Sensor Biasing | USB Peripheral Voltage Clamp |
|---|---|
Use Scenario: Providing stable 4.3 V bias to op-amp input stages in battery-powered environmental sensors. IC Role / Device Role / Timing Role: Shunt Zener reference maintaining signal chain offset accuracy across 0–70°C. Use Value: Low 1 µA leakage preserves battery life; ±5% VZ tolerance meets sensor ADC reference requirements. | Use Scenario: Clamping USB data line voltage to prevent ESD-induced overvoltage during hot-plug events. IC Role / Device Role / Timing Role: Transient voltage suppressor limiting D+ line to ≤4.3 V during fast-rising surges. Use Value: 500 mW rating handles short-duration ESD pulses; SC-76 size fits compact USB Type-C connector layout. |
| Industrial PLC Input Protection | Low-Power MCU Reset Circuit |
Use Scenario: Protecting 24 V DC digital input channels against field-wiring transients in factory automation controllers. IC Role / Device Role / Timing Role: Zener clamp absorbing induced spikes before they reach optocoupler input stage. Use Value: 70 Ω ZZT ensures clamping voltage stays within safe margin of downstream IC absolute max ratings. | Use Scenario: Generating clean reset threshold for 3.3 V microcontrollers powered from unregulated 5 V rails. IC Role / Device Role / Timing Role: Precision voltage detector setting Brown-Out Reset (BOR) trigger at 4.3 V. Use Value: Tight 5% tolerance eliminates need for external trimming resistors in BOR divider networks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX55C4V3 | Same 4.3 V nominal VZ, but ±5% tolerance achieved at 5 mA; 500 mW rating; DO-35 package | Through-hole mounting requires PCB redesign; higher thermal resistance than SC-76 | Choose for legacy through-hole production or where board space allows larger footprint |
| MMSZ4V3T1G | 4.3 V ±5% at 5 mA; 500 mW; SOD-123 package; ZZT = 90 Ω max | Slightly higher dynamic impedance affects regulation fidelity in precision references | Prefer for high-volume SMT where SOD-123 is already standardized in BOM |
Compared with RD4.3E-T4-AZ, BZX55C4V3 requires through-hole layout changes and offers inferior thermal performance, while MMSZ4V3T1G trades tighter tape compatibility for marginally higher impedance-making RD4.3E-T4-AZ optimal for new SC-76-based designs requiring proven NEC taping alignment.
Availability
RD4.3E-T4-AZ is available at Aetrix Electronics and suitable for portable sensor biasing, USB peripheral voltage clamping, and industrial PLC input protection requiring stable component supply and consistent tape-fed SMT placement.
Supply support for RD4.3E-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.
The RD4.3E-T4-AZ belongs to NEC's SC-76 Zener diode series engineered for high-reliability voltage reference and transient suppression in space-constrained industrial and consumer electronics.
FAQ
What is the Zener voltage tolerance of RD4.3E-T4-AZ?
The RD4.3E-T4-AZ has a Zener voltage tolerance of ±5% at IZ = 5 mA, meaning its actual breakdown voltage falls between 4.085 V and 4.515 V under specified test conditions. This tolerance is guaranteed per NEC's published specifications and applies directly to the RD4.3E-T4-AZ device in SC-76 packaging with -T4 taping.
Does RD4.3E-T4-AZ support lead-free reflow soldering?
Yes, RD4.3E-T4-AZ is compatible with standard lead-free reflow profiles (JEDEC J-STD-020), as confirmed by NEC's SC-76 package qualification data. Its plastic molding compound and termination finish withstand peak temperatures up to 260°C for 10 seconds, making RD4.3E-T4-AZ suitable for modern RoHS-compliant manufacturing lines.
What does the "-T4" suffix mean in RD4.3E-T4-AZ?
The "-T4" suffix in RD4.3E-T4-AZ designates NEC's fourth taping configuration for SC-76 devices, specifying carrier tape pocket orientation, sprocket hole spacing, and reel diameter (13-inch). This ensures reliable feeding in high-speed pick-and-place machines calibrated for NEC's -T4 standard, distinguishing RD4.3E-T4-AZ from -T1 or -T2 variants.
Can RD4.3E-T4-AZ replace a 4.3 V Zener in a precision voltage reference circuit?
RD4.3E-T4-AZ can serve in precision reference roles where ±5% initial tolerance and +2.5 mV/°C temperature coefficient meet system requirements. Its 70 Ω dynamic impedance and 1 µA leakage support moderate-accuracy applications, but for sub-1% total error, additional calibration or trimming may be needed beyond RD4.3E-T4-AZ alone.
Is RD4.3E-T4-AZ available in tape-and-reel format only?
Yes, RD4.3E-T4-AZ is supplied exclusively in tape-and-reel format per NEC's SC-76 taping specification, with 3000 units per reel. No bulk, tray, or tube packaging options were defined for this part number; the -T4 designation inherently implies tape-and-reel delivery optimized for automated assembly of RD4.3E-T4-AZ.
RD4.3E-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:
- -
RD4.3E-T4-AZ FAQ
1.How can I place an order for RD4.3E-T4-AZ through Aetrix?
Please submit a Request for Quotation (RFQ) for RD4.3E-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 RD4.3E-T4-AZ reliable?
The price and inventory of RD4.3E-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 RD4.3E-T4-AZ is usually 5 days.
3.What payment methods are accepted for RD4.3E-T4-AZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RD4.3E-T4-AZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RD4.3E-T4-AZ?
RD4.3E-T4-AZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RD4.3E-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 RD4.3E-T4-AZ?
For technical support, including RD4.3E-T4-AZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RD4.3E-T4-AZ requirements.
6.How does Aetrix verify that RD4.3E-T4-AZ is sourced from the original manufacturer or authorized distributors?
All RD4.3E-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 RD4.3E-T4-AZ meets industry standards.
7.What is the process for return or replacement of RD4.3E-T4-AZ?
All RD4.3E-T4-AZ units undergo pre-shipment inspection (PSI). If there is an issue with RD4.3E-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 RD4.3E-T4-AZ part is unused and in its original packaging.
Return procedure for RD4.3E-T4-AZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
RD4.3E-T4-AZ Tags
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MM5Z5V1ST1G
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