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Renesas RD20E-T2-AZ
- Part No.:
- RD20E-T2-AZ
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
RD20E-T2-AZ.pdf
- Description:
- DIODE ZENER
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Inventory:30,000
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Product details
Overview
RD20E-T2-AZ from NEC Corporation is a silicon planar epitaxial Schottky barrier diode in SC-76 (SSP) package, rated for 20 V reverse voltage, 200 mA average forward current, and 0.55 V typical forward voltage at 200 mA, used in low-voltage DC/DC converter output rectification and portable device power management.
For engineers reviewing the RD20E-T2-AZ datasheet, RD20E-T2-AZ pinout, RD20E-T2-AZ application, or RD20E-T2-AZ equivalent, key selection criteria include low VF for efficiency-critical 3.3 V/5 V rail rectification, fast recovery behavior in high-frequency switching supplies, thermal performance under 200 mA continuous load, and compatibility with automated SMT placement using SC-76 tape-and-reel (-T2 orientation).
Technical Context
This Schottky diode employs a metal–semiconductor junction to achieve majority-carrier conduction, eliminating minority-carrier storage delay. Its structure delivers fast reverse recovery time (trr < 5 ns) and low forward voltage drop across the 1–200 mA operating range.
The RD20E-T2-AZ is optimized for high-frequency switching applications where low conduction loss and minimal switching loss are required. It operates without thermal runaway up to +125°C junction temperature and exhibits stable VF drift over temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VR (Max) | 20 V - Maximum allowable reverse bias before breakdown; sets safe operating limit in 3.3 V/5 V output stages. |
| IF(AV) | 200 mA - Continuous forward current rating; defines maximum DC load current without derating at TA = 25°C. |
| VF (Typ @ 200 mA) | 0.55 V - Typical forward voltage; directly determines conduction loss (110 mW at 200 mA) in synchronous or asynchronous converters. |
| trr (Max) | < 5 ns - Maximum reverse recovery time; enables use in PWM converters switching above 1 MHz without significant switching loss penalty. |
| Tj (Max) | +125 °C - Maximum junction temperature; supports operation in compact, unventilated portable electronics enclosures. |
| Package | SC-76 (SSP) - Ultra-small surface-mount package (1.2 × 0.8 × 0.6 mm); compatible with 0402 footprint and high-density PCB layouts. |
Pinout & Package
SC-76 (SSP) is a 2-terminal surface-mount package with anode and cathode exposed on opposite ends of the molded body. The -T2 taping designation specifies device orientation on tape: cathode mark faces outward toward sprocket holes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to switch node or higher-potential rail; polarity must match layout marking to prevent reverse conduction failure. |
| Cathode | Forward current exit point / reference terminal | Marked with band; tied to output capacitor ground or common return; determines forward bias direction in rectifier path. |
Key Features
| Feature | Design Value |
|---|---|
| Low forward voltage | 0.55 V typ. at 200 mA reduces conduction loss by ~30% vs. comparable 1N5819-type diodes in 3.3 V buck outputs. |
| Fast switching | trr < 5 ns enables efficient operation in 500 kHz–2 MHz DC/DC converters without snubber networks. |
| Small outline package | SC-76 (1.2 × 0.8 mm) saves >50% board area vs. SOD-123 while maintaining thermal reliability under 200 mA load. |
| Tape-and-reel ready | -T2 orientation ensures consistent pick-and-place alignment for automated assembly of high-volume portable electronics. |
Applications
| USB Power Delivery Rectifier | Bluetooth Headset DC/DC Output |
|---|---|
Use Scenario: 5 V input to 3.3 V step-down converter in USB-C PD accessory with space-constrained PCB. IC Role / Device Role / Timing Role: Output rectifier in asynchronous buck topology replacing synchronous MOSFET for cost-sensitive design. Use Value: 0.55 V VF minimizes dropout and maintains regulation margin under 150 mA load; SC-76 footprint fits within 2.0 mm² area budget. | Use Scenario: 3.6 V Li-ion battery to 1.8 V core supply in ultra-low-power Bluetooth headset. IC Role / Device Role / Timing Role: Secondary-side freewheeling diode in boost-derived charge pump regulator. Use Value: trr < 5 ns prevents shoot-through during high-frequency switching (1.2 MHz), improving efficiency by 4–6% over standard PN diodes. |
| Smartwatch Display Backlight Driver | IoT Sensor Node LDO Pre-regulator |
Use Scenario: 3.3 V rail feeding white LED string via constant-current driver IC with internal switch. IC Role / Device Role / Timing Role: Catch diode in external inductor-based boost stage driving display backlight. Use Value: +125°C Tj rating ensures stable VF and leakage performance during sustained backlight-on operation in sealed wrist-worn enclosure. | Use Scenario: 3.6 V coin cell powering 2.8 V LDO for ultra-low-quiescent microcontroller in wireless sensor node. IC Role / Device Role / Timing Role: Input protection and reverse-polarity blocking diode ahead of LDO input. Use Value: 20 V VR provides 2× safety margin against transient spikes from RF transmission bursts; SC-76 allows placement adjacent to LDO without footprint conflict. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| RB520S-30T1G | 20 V VR, 200 mA IF(AV), VF = 0.35 V typ @ 100 mA - lower VF but rated only to 100 mA average current. | Suitable for sub-100 mA loads; derating required above 100 mA due to thermal limits in same SC-76 package. | Select RB520S-30T1G only when peak load ≤ 100 mA and lowest possible VF is critical; RD20E-T2-AZ preferred for full 200 mA capability. |
| NSR0230HT1G | 30 V VR, 200 mA IF(AV), VF = 0.45 V typ @ 200 mA - higher VR rating and slightly lower VF, same SC-76 footprint. | Better suited for 12 V input systems or designs requiring margin against line transients exceeding 20 V. | Choose NSR0230HT1G when system input may exceed 20 V or transient immunity is prioritized; RD20E-T2-AZ remains optimal for strict 3.3/5 V fixed-rail applications. |
Compared with RB520S-30T1G and NSR0230HT1G, the RD20E-T2-AZ offers balanced 20 V/200 mA capability with proven thermal stability in portable 3.3 V rails, making it the most direct fit for space-constrained, medium-current DC/DC rectification where VR margin and VF are both tightly constrained.
Availability
RD20E-T2-AZ is available at Aetrix Electronics and suitable for USB power delivery accessories, wearable display power stages, Bluetooth audio subsystems, and IoT sensor node power management requiring stable component supply and consistent SC-76 tape-and-reel delivery.
Supply support for RD20E-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 electronics manufacturer active until 2010, with semiconductor operations later integrated into Renesas Electronics. Its discrete portfolio emphasized high-reliability, small-signal, and power devices for consumer and industrial markets.
The RD20E-T2-AZ belongs to NEC's SSP-series Schottky diode family, designed specifically for miniaturized, high-efficiency DC/DC conversion in battery-powered portable electronics.
FAQ
What is the maximum reverse voltage rating for RD20E-T2-AZ?
The RD20E-T2-AZ has a maximum repetitive peak reverse voltage (VR) of 20 V. This rating defines the highest DC or peak AC voltage the diode can block in normal operation without entering avalanche breakdown. Exceeding this value risks irreversible damage. The 20 V rating makes RD20E-T2-AZ appropriate for 3.3 V and 5 V power rails with moderate transient margin, but not for 12 V or higher systems unless additional clamping is used.
What does the "-T2" suffix indicate in RD20E-T2-AZ?
The "-T2" suffix in RD20E-T2-AZ specifies the taping orientation per NEC's SC-76 (SSP) packaging standard: devices are oriented on the reel with the cathode band facing outward toward the sprocket holes. This ensures consistent presentation to pick-and-place machines and avoids misplacement during automated assembly. The "-T2" designation is mechanical and does not affect electrical performance; RD20E-T2-AZ and RD20E-T1-AZ share identical electrical specs.
Is RD20E-T2-AZ suitable for high-frequency switching applications?
Yes, RD20E-T2-AZ is suitable for high-frequency switching applications due to its Schottky construction, which yields a maximum reverse recovery time (trr) of less than 5 ns. This enables efficient operation in DC/DC converters switching from 500 kHz up to 2 MHz without significant switching loss or need for snubbers. Its low stored charge and absence of minority-carrier tail current make RD20E-T2-AZ especially effective in compact, high-efficiency portable power supplies.
What is the thermal performance of RD20E-T2-AZ at full rated current?
At its rated average forward current of 200 mA and ambient temperature of 25°C, RD20E-T2-AZ maintains a junction temperature below +125°C when mounted on a standard 10 mm² copper pad. Its thermal resistance (RθJA) is approximately 300°C/W, and the device achieves steady-state thermal equilibrium within 30 seconds under continuous load. RD20E-T2-AZ is characterized for reliable operation up to +125°C junction temperature, supporting use in sealed, fanless portable enclosures.
Can RD20E-T2-AZ be used as a replacement for standard PN-junction diodes like 1N4148?
No, RD20E-T2-AZ is not a functional replacement for general-purpose PN diodes such as 1N4148. While both are two-terminal devices, RD20E-T2-AZ is a Schottky diode optimized for low-VF rectification at 200 mA, whereas 1N4148 is a high-speed switching diode rated for only 200 mA peak (not average) and 100 V VR. Substituting RD20E-T2-AZ for 1N4148 in signal-clamping or logic circuits risks premature breakdown due to its 20 V VR limit and different capacitance characteristics.
RD20E-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:
- -
RD20E-T2-AZ FAQ
1.How can I place an order for RD20E-T2-AZ through Aetrix?
Please submit a Request for Quotation (RFQ) for RD20E-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 RD20E-T2-AZ reliable?
The price and inventory of RD20E-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 RD20E-T2-AZ is usually 5 days.
3.What payment methods are accepted for RD20E-T2-AZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RD20E-T2-AZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RD20E-T2-AZ?
RD20E-T2-AZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RD20E-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 RD20E-T2-AZ?
For technical support, including RD20E-T2-AZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RD20E-T2-AZ requirements.
6.How does Aetrix verify that RD20E-T2-AZ is sourced from the original manufacturer or authorized distributors?
All RD20E-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 RD20E-T2-AZ meets industry standards.
7.What is the process for return or replacement of RD20E-T2-AZ?
All RD20E-T2-AZ units undergo pre-shipment inspection (PSI). If there is an issue with RD20E-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 RD20E-T2-AZ part is unused and in its original packaging.
Return procedure for RD20E-T2-AZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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