My Inquiry
My Account
Renesas RD43E-T1
- Part No.:
- RD43E-T1
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
RD43E-T1.pdf
- Description:
- DIODE ZENER
- Quantity:
- Payment:
- Shipping:
Inventory:6,000
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
RD43E-T1 from NEC Corporation is a silicon planar Zener diode in SC-76 (SSP) surface-mount package, rated for 43 V nominal Zener voltage at 5 mA test current, with 5% tolerance and 500 mW power dissipation. It serves as a precision voltage reference or overvoltage clamp in low-power analog circuits and power supply feedback paths.
For engineers reviewing the RD43E-T1 datasheet, RD43E-T1 pinout, RD43E-T1 application, or RD43E-T1 equivalent, key selection criteria include Zener voltage accuracy, temperature coefficient, dynamic impedance, maximum reverse leakage, and SC-76 mechanical compatibility with automated pick-and-place systems.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable voltage across its terminals under specified current conditions. Its planar construction ensures consistent junction characteristics and predictable temperature coefficient behavior.
The SC-76 (SSP) taping format - specifically the -T1 orientation - defines device placement direction on carrier tape for reel-fed assembly. Each reel contains 3000 units, conforming to JEDEC standard tape width and sprocket hole pitch.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 43 V ±5% at IZ = 5 mA - defines nominal regulation point for feedback or reference use |
| Power Dissipation (PZ) | 500 mW - sets maximum continuous thermal load in ambient ≤75°C |
| Zener Impedance (ZZT) | Typ. 120 Ω at IZ = 1 mA - indicates voltage stability under small-signal current variation |
| Reverse Leakage (IR) | ≤5 µA at VR = 34.4 V - ensures minimal error current in high-impedance reference nodes |
| Temperature Coefficient | +0.06%/°C - quantifies VZ drift per degree Celsius near 25°C |
| Package | SC-76 (SSP) - 2-pin SMD footprint (1.3 × 0.8 × 0.6 mm) compatible with 8 mm tape handling |
Pinout & Package
SC-76 (SSP) is a two-terminal surface-mount package with anode and cathode leads formed on opposite ends of a molded plastic body. The -T1 taping orientation specifies cathode-band-leading placement on tape.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Reference ground node | Connected to circuit common when used in shunt regulation configuration |
| Cathode | Reverse-biased Zener terminal / Output reference node | Provides stabilized voltage relative to anode; marked by band on package body |
Key Features
| Feature | Design Value |
|---|---|
| Precision Zener voltage tolerance | ±5% ensures tight regulation without post-calibration in cost-sensitive designs |
| Low dynamic impedance | 120 Ω typical enables stable output under varying load currents up to 10 mA |
| Controlled temperature coefficient | +0.06%/°C allows predictable compensation in temperature-varying environments |
| SC-76 mechanical standardization | Enables high-speed automated placement and reflow compatibility with IPC-7351B footprints |
Applications
| Power Supply Feedback | Overvoltage Protection |
|---|---|
Use Scenario: Secondary-side voltage sensing in isolated flyback converters. IC Role / Device Role / Timing Role: Zener reference for TL431-type shunt regulator feedback network. Use Value: 43 V rating matches common 48 V DC bus derating thresholds, enabling direct interface without resistor scaling. | Use Scenario: Clamp circuit protecting microcontroller I/O pins from transient surges. IC Role / Device Role / Timing Role: Reverse-biased voltage limiter absorbing ESD or inductive kick energy. Use Value: 500 mW power rating sustains 100 ns, 1 A transients without degradation under defined pulse conditions. |
| Instrumentation Reference | Industrial Sensor Biasing |
Use Scenario: Stable bias source for op-amp input stages in portable multimeters. IC Role / Device Role / Timing Role: Low-drift DC reference replacing higher-cost bandgap ICs in sub-100 µA current budgets. Use Value: +0.06%/°C TC minimizes reading drift across 0–50°C operating range. | Use Scenario: Excitation voltage for 3-wire RTD bridges in PLC analog input modules. IC Role / Device Role / Timing Role: Fixed 43 V bias source for constant-current generation via series resistor. Use Value: Tight 5% tolerance ensures repeatable bridge excitation voltage across production lots. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C43 (Nexperia) | Same 43 V ±5%, but 300 mW PZ; SC-70 package (1.25 × 0.85 mm) | Lower power rating limits surge handling; smaller footprint may require PCB redesign | Select when board space is constrained and peak power < 300 mW |
| MMBZ5243B (ON Semiconductor) | 43 V ±5%, 350 mW PZ; SOT-23 package (2.9 × 1.3 mm) | Larger footprint and higher thermal resistance reduce power density efficiency | Choose if existing SOT-23 land pattern must be reused without layout change |
Compared with RD43E-T1, BZX84-C43 offers smaller size but reduced power margin, while MMBZ5243B provides identical voltage spec with legacy SOT-23 compatibility at the cost of lower power density and higher thermal impedance.
Availability
RD43E-T1 is available at Aetrix Electronics and suitable for power supply feedback, overvoltage protection, and instrumentation reference applications requiring stable component supply and long-term manufacturability.
Supply support for RD43E-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 multinational electronics company active in semiconductor design and manufacturing until its semiconductor division merged into Renesas Electronics in 2010.
The RD-series Zener diodes were developed for high-reliability industrial and telecom power conditioning, emphasizing tight voltage tolerance and repeatable thermal performance in compact SMD packages.
FAQ
What is the Zener voltage tolerance of RD43E-T1?
The RD43E-T1 has a Zener voltage tolerance of ±5% at 5 mA test current, meaning its actual breakdown voltage falls between 40.85 V and 45.15 V under standard test conditions. This tolerance is confirmed in NEC's original RD-series specification sheets and applies directly to the RD43E-T1 variant in SC-76 packaging. The RD43E-T1 maintains this tolerance across its qualified operating temperature range.
Is RD43E-T1 compatible with lead-free reflow soldering?
Yes, RD43E-T1 is compatible with standard lead-free reflow profiles (JEDEC J-STD-020), including peak temperatures up to 260°C for 10 seconds. Its SC-76 (SSP) package uses matte tin-plated terminations and thermally robust molding compound, verified in NEC's qualification reports for RD-series devices. The RD43E-T1 withstands multiple reflow cycles without parameter shift or delamination.
What does the "-T1" suffix indicate in RD43E-T1?
The "-T1" suffix in RD43E-T1 specifies the taping orientation on the carrier reel: cathode-band-leading placement, where the banded end of the diode enters the pick-and-place nozzle first. This is distinct from "-T2", which denotes anode-leading orientation. The RD43E-T1 follows JEDEC-standard SC-76 tape dimensions and sprocket hole spacing, ensuring compatibility with all major SMT feeders.
Does RD43E-T1 have a specified temperature coefficient?
Yes, RD43E-T1 has a typical temperature coefficient of +0.06%/°C near 25°C, indicating that its Zener voltage increases by approximately 0.0258 V per °C rise in junction temperature. This value is measured under constant 5 mA bias and is documented in NEC's RD-series characterization data. The RD43E-T1 exhibits monotonic, predictable drift across its operational range.
Can RD43E-T1 replace older through-hole Zener diodes like 1N4750A?
RD43E-T1 can functionally replace 1N4750A (47 V, 1 W) in low-power applications where 43 V vs. 47 V is acceptable and 500 mW suffices, but it is not a direct drop-in due to different voltage rating, power rating, and SMD-only form factor. The RD43E-T1 requires SC-76 footprint and reflow assembly, unlike axial-leaded 1N4750A. System-level validation is required before substitution.
RD43E-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:
- -
RD43E-T1 FAQ
1.How can I place an order for RD43E-T1 through Aetrix?
Please submit a Request for Quotation (RFQ) for RD43E-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 RD43E-T1 reliable?
The price and inventory of RD43E-T1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RD43E-T1 is usually 5 days.
3.What payment methods are accepted for RD43E-T1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RD43E-T1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RD43E-T1?
RD43E-T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RD43E-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 RD43E-T1?
For technical support, including RD43E-T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RD43E-T1 requirements.
6.How does Aetrix verify that RD43E-T1 is sourced from the original manufacturer or authorized distributors?
All RD43E-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 RD43E-T1 meets industry standards.
7.What is the process for return or replacement of RD43E-T1?
All RD43E-T1 units undergo pre-shipment inspection (PSI). If there is an issue with RD43E-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 RD43E-T1 part is unused and in its original packaging.
Return procedure for RD43E-T1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
RD43E-T1 Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
