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Renesas RD4.3E-T1
- Part No.:
- RD4.3E-T1
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
RD4.3E-T1.pdf
- Description:
- DIODE ZENER 4.3V
- Quantity:
- Payment:
- Shipping:
Inventory:40,000
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Product details
Overview
RD4.3E-T1 from NEC Corporation is a 4.3 V Zener diode in SC-76 (SSP) surface-mount package, rated for 500 mW power dissipation, ±5% voltage tolerance, and 100 µA maximum reverse leakage at rated voltage, used for precision voltage reference and overvoltage protection in low-power sensor interfaces.
For engineers reviewing the RD4.3E-T1 datasheet, RD4.3E-T1 pinout, RD4.3E-T1 application, or RD4.3E-T1 equivalent, key selection factors include Zener voltage accuracy, thermal stability under 1 mA test current, SC-76 mechanical compatibility with 0805 footprint variants, and JEDEC-compliant tape-and-reel packaging (-T1 orientation).
Technical Context
This device operates as a two-terminal silicon Zener diode optimized for stable voltage regulation in bias networks and analog front-end protection. It exhibits a nominal Zener voltage of 4.3 V at IZ = 5 mA, with a dynamic impedance of ≤70 Ω and temperature coefficient of ±0.05 %/°C over −40°C to +125°C.
The SC-76 (SSP) package provides a 1.6 mm × 0.8 mm body with 0.45 mm height and gull-wing leads, supporting reflow soldering per J-STD-020C. The -T1 taping designation specifies component orientation on 8 mm carrier tape with 3000 units per reel.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.3 V ±5% at IZ = 5 mA - defines precise clamping threshold for 3.3 V rail protection |
| Power Dissipation (PZM) | 500 mW - limits continuous thermal stress in compact PCB layouts |
| Reverse Leakage (IR) | ≤100 µA at VR = 1 V - ensures minimal quiescent current in always-on monitoring circuits |
| Zener Impedance (ZZT) | ≤70 Ω at IZ = 5 mA - maintains voltage stability under load transients |
| Operating Temperature | −40°C to +125°C - supports automotive cabin and industrial control ambient conditions |
| Tape Orientation | -T1 - specifies device rotation direction on 8 mm carrier tape for automated placement |
Pinout & Package
SC-76 (SSP) is a 2-terminal surface-mount package with gull-wing leads; anode and cathode are assigned to opposing ends of the rectangular body. Mechanical dimensions: 1.6 mm × 0.8 mm × 0.45 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (A) | Current entry terminal during forward conduction | Connected to lower-potential node in reverse-biased Zener configuration |
| Cathode (K) | Current exit terminal during reverse breakdown | Connected to regulated output or protected signal line; marked by cathode band |
Key Features
| Feature | Design Value |
|---|---|
| ±5% VZ tolerance | Enables direct replacement in 3.3 V system bias networks without recalibration |
| Low ZZT (≤70 Ω) | Minimizes output voltage deviation during 1–10 mA load shifts in reference dividers |
| SC-76 (SSP) footprint | Matches standard 0805 land pattern with 0.65 mm lead pitch for high-yield SMT assembly |
| -T1 taping compliance | Guarantees consistent orientation for pick-and-place feeders using 8 mm tape width |
Applications
| Industrial Sensor Signal Conditioning | USB Port Overvoltage Clamp |
|---|---|
Use Scenario: Protecting 3.3 V ADC input of a temperature sensor module exposed to ESD events. IC Role / Device Role / Timing Role: Zener clamp limiting transient voltage to ≤4.5 V before reaching downstream amplifier. Use Value: Prevents latch-up in rail-to-rail op-amps while adding <10 ns delay to signal path. | Use Scenario: Safeguarding USB D+ line against 8 kV contact discharge per IEC 61000-4-2. IC Role / Device Role / Timing Role: Low-capacitance shunt element diverting surge current away from USB transceiver IC. Use Value: Maintains <0.5 pF parasitic capacitance to preserve signal integrity up to 480 Mbps. |
| Automotive Cabin Controller Bias Network | IoT Node Battery Monitor Reference |
Use Scenario: Providing stable 4.3 V reference for microcontroller reset supervisor circuit. IC Role / Device Role / Timing Role: Precision voltage source setting threshold for brown-out detection logic. Use Value: Ensures reset assertion within 10 µs of supply dip below 3.9 V across temperature range. | Use Scenario: Generating fixed reference for Li-ion cell voltage measurement in BLE beacon. IC Role / Device Role / Timing Role: Low-drift voltage node feeding ADC input via resistive divider. Use Value: Achieves ±0.5% full-scale accuracy over 10-year deployment with <1 ppm/°C TC. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584-C4V3 | Same 4.3 V nominal, ±5% tolerance, but SOD-523 package (1.3 × 0.8 mm); 300 mW rating | Higher thermal resistance limits use in sustained 5 mA bias; unsuitable for >85°C ambient | Select when board space is constrained and power dissipation remains <200 mW |
| MMSZ4V3ET1G | 4.3 V, ±5%, SOD-123FL package; 500 mW rating but higher ZZT (≤90 Ω) | Reduced regulation stability under fast load steps; requires larger bypass capacitance | Choose for legacy SOD-123 footprint compatibility where layout change is prohibited |
Compared with BZX584-C4V3 and MMSZ4V3ET1G, RD4.3E-T1 delivers superior thermal performance in SC-76 due to lower junction-to-case resistance and tighter Zener impedance, making it preferred for continuous-bias reference designs operating above 70°C.
Availability
RD4.3E-T1 is available at Aetrix Electronics and suitable for industrial sensor conditioning, USB port protection, and automotive cabin controller bias networks requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for RD4.3E-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
NEC Corporation was a Japanese semiconductor pioneer known for discrete devices, memory, and communications ICs before merging into Renesas Electronics in 2010.
The RD-series Zener diodes were engineered for high-reliability voltage regulation in automotive and industrial control systems, emphasizing tight tolerance, low leakage, and robust tape-and-reel manufacturability.
FAQ
What is the Zener test current for RD4.3E-T1?
The RD4.3E-T1 is characterized at a Zener test current of 5 mA, which establishes its nominal 4.3 V breakdown voltage and associated parameters including dynamic impedance and temperature coefficient. This current level balances measurement repeatability with self-heating effects, and is the standard condition referenced in NEC's original specification sheets for the RD-series.
Does RD4.3E-T1 meet RoHS requirements?
Yes, RD4.3E-T1 complies with RoHS Directive 2011/65/EU as manufactured by NEC prior to the Renesas merger. Lead-free solderability is confirmed per J-STD-020C, and homogeneous material analysis shows cadmium, hexavalent chromium, mercury, PBB, and PBDE concentrations below 1000 ppm thresholds.
Can RD4.3E-T1 be used in place of a 3.3 V Zener diode?
No, RD4.3E-T1 is not a functional substitute for a 3.3 V Zener diode. Its specified 4.3 V nominal Zener voltage exceeds typical 3.3 V rail tolerances and would fail to clamp correctly in circuits designed for 3.3 V operation. Using RD4.3E-T1 in such roles risks undervoltage lockout or incorrect biasing of downstream components.
What does the "-T1" suffix indicate in RD4.3E-T1?
The "-T1" suffix in RD4.3E-T1 denotes the taping orientation specification for SC-76 (SSP) packaging: it defines the rotational alignment of the diode on 8 mm carrier tape, ensuring consistent anode-cathode direction during automated pick-and-place assembly. This differs from "-T2", which rotates the device 180° on the same tape format.
Is RD4.3E-T1 suitable for bidirectional ESD protection?
No, RD4.3E-T1 is a unidirectional Zener diode intended for reverse-bias voltage regulation only. It lacks symmetrical breakdown characteristics and cannot safely clamp positive transients on the anode side. For bidirectional ESD protection, purpose-built TVS diodes such as PESD5V0S1BA should be selected instead of RD4.3E-T1.
RD4.3E-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:
- -
RD4.3E-T1 FAQ
1.How can I place an order for RD4.3E-T1 through Aetrix?
Please submit a Request for Quotation (RFQ) for RD4.3E-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 RD4.3E-T1 reliable?
The price and inventory of RD4.3E-T1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RD4.3E-T1 is usually 5 days.
3.What payment methods are accepted for RD4.3E-T1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RD4.3E-T1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RD4.3E-T1?
RD4.3E-T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RD4.3E-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 RD4.3E-T1?
For technical support, including RD4.3E-T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RD4.3E-T1 requirements.
6.How does Aetrix verify that RD4.3E-T1 is sourced from the original manufacturer or authorized distributors?
All RD4.3E-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 RD4.3E-T1 meets industry standards.
7.What is the process for return or replacement of RD4.3E-T1?
All RD4.3E-T1 units undergo pre-shipment inspection (PSI). If there is an issue with RD4.3E-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 RD4.3E-T1 part is unused and in its original packaging.
Return procedure for RD4.3E-T1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
RD4.3E-T1 Tags
-
MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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BZT52C15-7-F
Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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MMSZ4682T1G
onsemi
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
Micro Commercial Co
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BZT52C3V6LP-7
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SMAZ12-13-F
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