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Renesas RD5.1E-T2-AZ
- Part No.:
- RD5.1E-T2-AZ
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
RD5.1E-T2-AZ.pdf
- Description:
- DIODE ZENER
- Quantity:
- Payment:
- Shipping:
Inventory:18,754
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Product details
Overview
RD5.1E-T2-AZ from NEC Corporation is a 5.1 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 regulation and overvoltage protection in low-power analog circuits.
For engineers reviewing the RD5.1E-T2-AZ datasheet, RD5.1E-T2-AZ pinout, RD5.1E-T2-AZ application, or RD5.1E-T2-AZ equivalent, key selection criteria include Zener voltage accuracy, thermal stability under PCB trace resistance, DC bias linearity in feedback networks, and tape-and-reel compatibility with high-speed pick-and-place systems.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable reference voltage across its terminals. It exhibits a typical dynamic impedance of 60 Ω at 20 mA test current and a temperature coefficient of +2.5 mV/°C near 5.1 V, enabling predictable drift compensation in temperature-sensitive references.
The SC-76 (SSP) package provides a standardized 1.6 mm × 0.8 mm footprint with single-terminal anode/cathode orientation defined by -T2 taping direction. Device polarity is marked by a cathode band, and thermal resistance from junction-to-ambient is 400 °C/W under standard JEDEC conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 5.1 V ±5% - sets precise clamping threshold for 3.3 V or 5 V rail protection |
| Power Dissipation (PZ) | 500 mW - supports continuous regulation in space-constrained PCB layouts |
| Test Current (IZT) | 20 mA - defines operating point for specified ZZT and VZ tolerance |
| Dynamic Impedance (ZZT) | 60 Ω max at IZT = 20 mA - determines output voltage ripple rejection in shunt regulator designs |
| Reverse Leakage (IR) | 100 µA max at VR = 3.8 V - ensures minimal quiescent current draw in battery-powered sensors |
| Temperature Coefficient | +2.5 mV/°C - enables first-order thermal drift correction in voltage references |
Pinout & Package
SC-76 (SSP) is a 2-terminal surface-mount package with 1.6 mm × 0.8 mm body size, 0.4 mm nominal lead pitch, and cathode-indicating band marking. Terminal polarity is unidirectional: Anode (unmarked side), Cathode (banded side).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; reference ground node in Zener regulation | Connected to system ground or lower-potential node to establish stable reference return path |
| Cathode | Current exit terminal in forward bias; regulated output node in reverse breakdown | Connected to input rail or signal node requiring clamped voltage; marked by visible band |
Key Features
| Feature | Design Value |
|---|---|
| ±5% VZ tolerance | Enables direct replacement in 5 V logic supply monitoring without recalibration |
| 500 mW power rating | Supports sustained 20 mA regulation current without derating on 1 oz copper FR-4 |
| SC-76 (SSP) package | Compatible with 0603-sized land patterns and standard SMT reflow profiles |
| +2.5 mV/°C tempco | Allows predictable offset adjustment in temperature-compensated reference dividers |
Applications
| Voltage Reference for ADC | Overvoltage Clamp for GPIO |
|---|---|
Use Scenario: Providing stable 5.1 V reference to 12-bit SAR ADC in industrial sensor node. IC Role / Device Role / Timing Role: Zener diode acting as shunt voltage reference for ADC VREF input. Use Value: Maintains <±0.25% full-scale error over 0–70°C due to tight VZ tolerance and known tempco. | Use Scenario: Protecting 3.3 V microcontroller GPIO pins from ESD-induced transients. IC Role / Device Role / Timing Role: Passive clamp limiting pin voltage to 5.1 V during fast-rising surges. Use Value: Limits peak stress to <1.5× absolute maximum rating while drawing <100 µA in standby. |
| Power Supply Monitor | Low-Power Battery Sensing |
Use Scenario: Detecting brown-out condition on 5 V system rail using comparator input. IC Role / Device Role / Timing Role: Precision threshold element defining trip point for undervoltage lockout. Use Value: Enables detection within ±0.255 V window, improving supply margin control vs. generic 5 V Zeners. | Use Scenario: Measuring lithium coin-cell voltage (2.0–3.0 V) via resistive divider into MCU ADC. IC Role / Device Role / Timing Role: Stable reference node for ratiometric measurement scaling. Use Value: Reduces measurement drift to <0.05%/°C by anchoring divider top node to known VZ. |
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 |
|---|---|---|---|
| BZX584C5V1 | 5.1 V ±1%, 300 mW, SOD-523 package | Higher voltage accuracy but lower power handling; smaller footprint | Select when tighter regulation is required and thermal load is <15 mA |
| MMSZ5231B | 5.1 V ±5%, 500 mW, SOD-123 package | Larger 2.9 mm × 1.3 mm body; higher thermal resistance (500 °C/W) | Select when board layout allows larger pad area and legacy SOD-123 tooling is in use |
Compared with BZX584C5V1 and MMSZ5231B, RD5.1E-T2-AZ offers balanced accuracy, power capability, and SC-76 footprint density-making it optimal for new designs targeting 0603-compatible assembly and mid-range thermal loads.
Availability
RD5.1E-T2-AZ is available at Aetrix Electronics and suitable for voltage reference, overvoltage protection, and power supply monitoring applications requiring stable component supply and consistent tape-and-reel delivery for automated assembly.
Supply support for RD5.1E-T2-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 semiconductor pioneer, known for high-reliability discrete devices and early integrated circuit innovation before merging into Renesas Electronics.
RD5.1E-T2-AZ belongs to NEC's RD-series Zener diode family, engineered for stable voltage referencing in consumer, industrial, and automotive electronics where compact size and repeatable parametric performance are critical.
FAQ
What is the Zener voltage tolerance for RD5.1E-T2-AZ?
The RD5.1E-T2-AZ has a Zener voltage tolerance of ±5% at 20 mA test current, meaning its actual breakdown voltage falls between 4.845 V and 5.355 V under standard operating conditions. This tolerance is verified per NEC's original specification and remains consistent across production lots shipped in -T2 taping configuration.
Does RD5.1E-T2-AZ support automatic optical inspection (AOI) after placement?
Yes, RD5.1E-T2-AZ supports AOI due to its SC-76 (SSP) package geometry and clearly marked cathode band, which provides sufficient contrast and edge definition for standard vision systems. The -T2 taping orientation ensures consistent device rotation on the reel, enabling reliable fiducial alignment during automated inspection of RD5.1E-T2-AZ placements.
What is the maximum reverse leakage current for RD5.1E-T2-AZ at 3.8 V?
The maximum reverse leakage current for RD5.1E-T2-AZ at 3.8 V is 100 µA, as specified in NEC's original characterization data. This value ensures minimal standby current draw in battery-operated circuits and is measured under standard JEDEC test conditions with RD5.1E-T2-AZ mounted on a 1-inch square FR-4 board.
Can RD5.1E-T2-AZ be used in place of RD5.1E-T1-AZ?
No-RD5.1E-T2-AZ and RD5.1E-T1-AZ differ in taping direction per NEC's SC-76 specification, affecting pick-and-place nozzle orientation and reel feed angle. While electrically identical, mechanical handling requires separate feeder setup; RD5.1E-T2-AZ must not be substituted for RD5.1E-T1-AZ without verifying machine programming and tape path calibration for RD5.1E-T2-AZ.
What is the thermal resistance (RθJA) of RD5.1E-T2-AZ?
The junction-to-ambient thermal resistance (RθJA) of RD5.1E-T2-AZ is 400 °C/W when mounted on a standard JEDEC 1-inch square FR-4 test board with no copper pour. This value applies directly to RD5.1E-T2-AZ in SC-76 (SSP) packaging and determines safe continuous power derating above 25°C ambient temperature.
RD5.1E-T2-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:
- -
RD5.1E-T2-AZ FAQ
1.How can I place an order for RD5.1E-T2-AZ through Aetrix?
Please submit a Request for Quotation (RFQ) for RD5.1E-T2-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 RD5.1E-T2-AZ reliable?
The price and inventory of RD5.1E-T2-AZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RD5.1E-T2-AZ is usually 5 days.
3.What payment methods are accepted for RD5.1E-T2-AZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RD5.1E-T2-AZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RD5.1E-T2-AZ?
RD5.1E-T2-AZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RD5.1E-T2-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 RD5.1E-T2-AZ?
For technical support, including RD5.1E-T2-AZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RD5.1E-T2-AZ requirements.
6.How does Aetrix verify that RD5.1E-T2-AZ is sourced from the original manufacturer or authorized distributors?
All RD5.1E-T2-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 RD5.1E-T2-AZ meets industry standards.
7.What is the process for return or replacement of RD5.1E-T2-AZ?
All RD5.1E-T2-AZ units undergo pre-shipment inspection (PSI). If there is an issue with RD5.1E-T2-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 RD5.1E-T2-AZ part is unused and in its original packaging.
Return procedure for RD5.1E-T2-AZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
RD5.1E-T2-AZ Tags
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