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Renesas RD20S-T1-A
- Part No.:
- RD20S-T1-A
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
RD20S-T1-A.pdf
- Description:
- DIODE ZENER 2-SUPER MINI MOLD
- Quantity:
- Payment:
- Shipping:
Inventory:147,396
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Product details
Overview
RD20S-T1-A from Renesas Electronics is a 2-pin ultra super mini mold Zener diode with nominal zener voltage of 20 V, 150 mW power dissipation, low-noise operation, and sharp breakdown characteristics. It serves as a precision voltage reference or surge absorber in audio equipment, instrumentation circuits, and constant-voltage regulation stages.
For engineers reviewing the RD20S-T1-A datasheet, RD20S-T1-A pinout, RD20S-T1-A application, or RD20S-T1-A equivalent, this page delivers verified electrical parameters, package dimensions, thermal behavior, temperature coefficient, and real-world use context for design-in validation and BOM selection.
Technical Context
The RD20S-T1-A operates with a zener test current of 0.5 mA and exhibits dynamic impedance of ≤100 Ω at that condition. Its reverse current is limited to 0.1 µA at VR = 15 V, ensuring high-impedance blocking in standby states.
Designed for ambient temperatures from –55 °C to +150 °C, it features a temperature coefficient of +0.04 %/°C (≈+8 mV/°C) near 20 V, enabling predictable drift compensation in stable reference designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (Vz) | 20 V ±5% at Iz = 0.5 mA - defines stable regulation point for low-power biasing |
| Power Dissipation (P) | 150 mW at TA = 25 °C - sets maximum continuous DC power handling on standard PCBs |
| Dynamic Impedance (Zz) | ≤100 Ω at Iz = 0.5 mA - ensures minimal output voltage variation under load transients |
| Reverse Current (IR) | ≤0.1 µA at VR = 15 V - guarantees high off-state isolation in clamping or reference applications |
| Temperature Coefficient (γz) | +0.04 %/°C (≈+8 mV/°C) - enables predictable Vz drift correction across industrial temperature range |
| Surge Power (PRSM) | 2.2 W at t = 10 µs - supports transient overvoltage suppression without failure |
Pinout & Package
RD20S-T1-A uses a 2-pin Ultra Super Mini Mold package (USM), measuring 2.1 mm × 1.3 mm × 0.7 mm with cathode indicated by a band. The package is surface-mount compatible and optimized for low parasitic inductance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / reference ground node | Connected to circuit ground or lower-potential rail when used in reverse-biased regulation |
| Cathode | Zener breakdown terminal / regulated output node | Provides stable 20 V reference relative to anode; marked with visible band on package |
Key Features
| Feature | Design Value |
|---|---|
| Low noise performance | Enables use in audio signal path references and sensitive analog front-ends without introducing audible hiss |
| Sharp breakdown characteristic | Delivers abrupt knee transition at Vz, improving regulation accuracy and reducing leakage uncertainty |
| E24-standard zener voltage | Ensures compatibility with standard resistor and capacitor value series for predictable feedback network design |
| Ultra compact USM package | Reduces PCB footprint to <2.8 mm² while maintaining thermal robustness for high-density layouts |
Applications
| Audio Equipment Reference | Instrumentation Voltage Clamp |
|---|---|
Use Scenario: Biasing op-amp input stages and setting gain thresholds in portable audio mixers. IC Role / Device Role / Timing Role: Precision DC reference source stabilizing operating points against supply ripple. Use Value: Low noise and sharp knee ensure clean signal integrity without distortion or threshold jitter. |
Use Scenario: Protecting ADC inputs from ESD-induced overvoltage in handheld multimeters. IC Role / Device Role / Timing Role: Fast-acting shunt clamp limiting input voltage to safe levels during transients. Use Value: 2.2 W surge rating and 10 µs response enable reliable protection without sacrificing measurement resolution. |
| Constant-Voltage Power Supply | Waveform Clipper Circuit |
Use Scenario: Generating fixed 20 V rail for sensor excitation in industrial temperature transmitters. IC Role / Device Role / Timing Role: Shunt regulator establishing stable excitation voltage independent of load current variation. Use Value: 150 mW rating and ≤100 Ω Zz maintain regulation accuracy within ±1% across 0–5 mA load range. |
Use Scenario: Limiting AC signal amplitude to ±20 V in function generator output stages. IC Role / Device Role / Timing Role: Bidirectional clipping element defining hard voltage boundaries on symmetrical waveforms. Use Value: Matched forward and reverse characteristics allow precise symmetric clipping without offset error. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4744A | 20 V ±5%, 1 W power rating, DO-41 package (5.2 mm × 2.7 mm) | Higher power handling but larger footprint and higher thermal mass; less suitable for space-constrained SMT designs | Choose when >150 mW continuous dissipation is required and board area permits through-hole or larger SMT placement |
| BZX55C20 | 20 V ±5%, 500 mW rating, DO-35 package (4.1 mm × 1.9 mm), higher Zz (~120 Ω) | Greater power margin than RD20S-T1-A but larger size and higher dynamic impedance degrades regulation fidelity | Prefer where cost sensitivity outweighs noise and size constraints, and where tighter Vz stability is not critical |
Compared with 1N4744A and BZX55C20, RD20S-T1-A offers superior space efficiency and lower noise in low-power reference roles, though its 150 mW limit requires careful thermal design in sustained-load applications.
Availability
RD20S-T1-A is available at Aetrix Electronics and suitable for audio equipment, instrumentation circuits, and constant-voltage regulation requiring stable component supply with tight parametric consistency and RoHS-compliant packaging.
Supply support for RD20S-T1-A 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
Renesas Electronics Corporation is a global semiconductor leader delivering microcontrollers, analog, power, and timing solutions for industrial, automotive, and consumer systems.
RD20S-T1-A belongs to the RDxUJ series of low-noise Zener diodes designed specifically for high-fidelity voltage reference and transient suppression in compact, noise-sensitive electronics.
FAQ
What is the zener voltage tolerance for RD20S-T1-A?
The RD20S-T1-A has a nominal zener voltage of 20 V with a tolerance of ±5%, verified at Iz = 0.5 mA per the D13938EJ3V0DS00 datasheet. This corresponds to a guaranteed Vz range of 19.0 V to 21.0 V under standard test conditions, supporting predictable circuit calibration.
Can RD20S-T1-A be used in surface-mount applications?
Yes, RD20S-T1-A uses a 2-pin Ultra Super Mini Mold (USM) package with standardized SMT pad layout and reflow-compatible construction. Its 2.1 mm × 1.3 mm footprint and 0.7 mm height make it suitable for high-density PCB assembly using standard Type II or III reflow profiles.
What is the maximum reverse surge power rating for RD20S-T1-A?
RD20S-T1-A is rated for 2.2 W of reverse surge power at pulse width t = 10 µs (single pulse), as specified in the "Maximum Ratings" table of the official datasheet. This enables reliable transient suppression in ESD-prone interfaces without permanent degradation.
Does RD20S-T1-A meet RoHS requirements?
Yes, RD20S-T1-A complies with the EU RoHS Directive and contains no lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls (PBB), or polybrominated diphenyl ethers (PBDE). Renesas confirms environmental compliance in accordance with applicable regulatory frameworks.
How does temperature affect the zener voltage of RD20S-T1-A?
RD20S-T1-A exhibits a positive temperature coefficient of +0.04 %/°C (approximately +8 mV/°C) near 20 V. This means its zener voltage increases linearly with junction temperature, allowing predictable drift modeling in thermal-aware reference designs across –55 °C to +150 °C.
RD20S-T1-A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- -
- Tolerance:
- -
- Power - Max:
- -
- Impedance (Max) (Zzt):
- -
- Current - Reverse Leakage @ Vr:
- -
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 2-Super Mini Mold
RD20S-T1-A FAQ
1.How can I place an order for RD20S-T1-A through Aetrix?
Please submit a Request for Quotation (RFQ) for RD20S-T1-A 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 RD20S-T1-A reliable?
The price and inventory of RD20S-T1-A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RD20S-T1-A is usually 5 days.
3.What payment methods are accepted for RD20S-T1-A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RD20S-T1-A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RD20S-T1-A?
RD20S-T1-A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RD20S-T1-A 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 RD20S-T1-A?
For technical support, including RD20S-T1-A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RD20S-T1-A requirements.
6.How does Aetrix verify that RD20S-T1-A is sourced from the original manufacturer or authorized distributors?
All RD20S-T1-A 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 RD20S-T1-A meets industry standards.
7.What is the process for return or replacement of RD20S-T1-A?
All RD20S-T1-A units undergo pre-shipment inspection (PSI). If there is an issue with RD20S-T1-A, 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 RD20S-T1-A part is unused and in its original packaging.
Return procedure for RD20S-T1-A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
RD20S-T1-A Tags
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