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Renesas RD22S-T1-AT
- Part No.:
- RD22S-T1-AT
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
RD22S-T1-AT.pdf
- Description:
- DIODE ZENER 2-SUPER MINI MOLD
- Quantity:
- Payment:
- Shipping:
Inventory:16,000
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Product details
Overview
RD22S-T1-AT from Renesas Electronics is a 200 mW, 2-pin Super Mini Mold zener diode with a nominal zener voltage of 22 V (20.81–23.25 V at 5 mA), dynamic impedance of 55 Ω max, and reverse current ≤2 μA at 17 V. It provides precise voltage regulation in low-power biasing, reference, and surge suppression circuits for consumer and industrial electronics.
For engineers reviewing the RD22S-T1-AT datasheet, RD22S-T1-AT pinout, RD22S-T1-AT application, or RD22S-T1-AT equivalent, this page delivers verified electrical specs, package dimensions, thermal behavior, zener voltage tolerance bands (B1/B2/B3), and direct alternative options for voltage reference design and overvoltage protection.
Technical Context
This device operates as a two-terminal silicon zener diode optimized for stable reverse-biased breakdown at 22 V. Its sharp breakdown characteristic and E24-standardized voltage grading support accurate DC reference generation and waveform clamping in compact PCB layouts.
Designed for surface-mount assembly in the Super Mini Mold (SOD-323) package, RD22S-T1-AT exhibits a junction temperature limit of 150°C, 85 W non-repetitive surge power capability at 10 μs, and a negative zener voltage temperature coefficient typical of mid-voltage zeners (~−0.05 %/°C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 20.81–23.25 V at IZ = 5 mA - defines usable regulation window under standard test conditions |
| Dynamic Impedance (ZZ) | ≤55 Ω at IZ = 5 mA - ensures minimal output voltage variation under load current changes |
| Power Dissipation (P) | 200 mW at TA = 25°C - sets maximum continuous DC power handling on standard PCB |
| Reverse Current (IR) | ≤2 μA at VR = 17 V - guarantees low leakage in high-impedance reference nodes |
| Surge Power (PRSM) | 85 W at t = 10 μs - supports transient overvoltage absorption without failure |
| Junction Temperature (Tj) | 150°C maximum - determines thermal derating curve and board layout requirements |
| Package | SOD-323 (2.5 × 1.25 mm) - enables high-density placement and automated reflow assembly |
Pinout & Package
RD22S-T1-AT uses the SOD-323 surface-mount package with cathode indication marked by a band on one end. Dimensions: 2.5 ±0.15 mm length, 1.25 ±0.1 mm width, 0.9 ±0.1 mm height. Cathode terminal is electrically connected to the banded side.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path / low-impedance return during reverse breakdown | Connected to lower-potential node in zener regulator configuration; carries full load current |
| Cathode | Zener breakdown terminal / regulated output node | Provides stable 22 V reference when biased above VZ; must be routed with low-inductance trace for transient response |
Key Features
| Feature | Design Value |
|---|---|
| Sharp breakdown characteristic | Enables clean voltage clamping and minimal knee-region ambiguity in precision references |
| E24-standard zener voltage grading | Supports standardized B1/B2/B3 tolerance bands (±2.5% to ±5%) for predictable binning and interchangeability |
| 200 mW power rating in SOD-323 | Delivers higher power density than standard SOD-123 while maintaining footprint compatibility with space-constrained designs |
| Negative temperature coefficient | ≈−0.05 %/°C near 22 V - allows compensation pairing with positive-TC components in reference circuits |
| 85 W surge capability (10 μs) | Withstands common ESD and inductive switching transients without degradation or parametric shift |
Applications
| Power Supply Reference | Overvoltage Clamp |
|---|---|
Use Scenario: Providing stable 22 V reference for linear regulator feedback or ADC reference buffer in battery-powered instrumentation. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to generate fixed DC potential independent of supply variation. Use Value: Maintains ±2.5% regulation accuracy across 0–50°C ambient, enabling <1 LSB error in 12-bit analog systems. |
Use Scenario: Protecting microcontroller I/O pins from 24 V field bus surges in industrial PLC input modules. IC Role / Device Role / Timing Role: Shunt limiter that conducts excess energy above 23.25 V to ground during transient events. Use Value: Absorbs 85 W for 10 μs without failure, preventing latch-up or permanent damage to downstream logic. |
| Waveform Clipper | Current Source Bias |
Use Scenario: Limiting audio signal peaks to ±22 V in analog line driver stages to prevent amplifier saturation. IC Role / Device Role / Timing Role: Bidirectional clamping element (with series resistor) defining hard voltage rails for AC-coupled signals. Use Value: Sharp knee and low ZZ ensure minimal distortion below threshold and rapid transition into conduction. |
Use Scenario: Setting bias current for LED drivers or op-amp input stage in low-cost sensor signal conditioning circuits. IC Role / Device Role / Timing Role: Constant-voltage element establishing fixed voltage drop across emitter/base resistors. Use Value: Enables stable 22 V bias with ≤2 μA leakage, minimizing quiescent current drift in battery-operated devices. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5248BS-7-F (Diodes Inc.) | 22 V nominal, 200 mW, SOD-323, but tighter VZ tolerance (±5% vs. RD22S-T1-AT's B-class ±2.5–5%), higher ZZ (70 Ω) | Less suitable for high-precision references; better for general-purpose clamping where tighter lot-to-lot consistency is needed | Select when requiring AEC-Q200 qualification or broader global distribution; verify thermal derating on target PCB |
| BZX384-B22 (Nexperia) | 22 V nominal, 300 mW, SOD-323, lower ZZ (40 Ω), but higher IR (≤5 μA at 17.6 V) | Higher power margin supports longer-duration transients; higher leakage may affect ultra-low-power bias networks | Prefer for surge-heavy environments with >200 mW average dissipation needs; confirm layout thermal relief matches 300 mW rating |
Compared with RD22S-T1-AT, MMBZ5248BS-7-F trades voltage precision for qualification breadth, while BZX384-B22 offers higher power headroom at the cost of leakage sensitivity-making RD22S-T1-AT optimal for cost-sensitive, thermally constrained 22 V reference designs requiring tight initial tolerance and low leakage.
Availability
RD22S-T1-AT is available at Aetrix Electronics and suitable for power supply reference, overvoltage clamp, and waveform clipper applications requiring stable component supply, consistent zener voltage binning, and RoHS-compliant SOD-323 packaging.
Supply support for RD22S-T1-AT 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 Japanese semiconductor manufacturer formed in 2010 through the merger of NEC Electronics and Renesas Technology, specializing in microcontrollers, analog, and discrete power devices.
The RD2.0S–RD150S series was developed for compact, low-power voltage regulation and transient suppression in consumer, office, and industrial equipment-emphasizing reliability, E24 grading, and SOD-323 manufacturability.
FAQ
What is the exact zener voltage range for RD22S-T1-AT at 5 mA test current?
The RD22S-T1-AT has a guaranteed zener voltage range of 20.81 V to 23.25 V when measured at IZ = 5 mA per the Renesas D11444EJ6V0DS datasheet. This corresponds to Class B specification, with sub-bins B1 (20.81–21.84 V), B2 (21.46–22.55 V), and B3 (22.15–23.25 V) available for tighter tolerance selection. RD22S-T1-AT maintains this range under pulsed 40 ms testing conditions.
Does RD22S-T1-AT have AEC-Q200 qualification for automotive use?
No, RD22S-T1-AT is not AEC-Q200 qualified. Per Renesas documentation, it is rated for "Standard" quality grade applications including computers, office equipment, communications gear, and industrial robots-not transportation or safety-critical systems. RD22S-T1-AT is unsuitable for automotive ECUs or ADAS modules unless separately validated and approved by Renesas for that use case.
What is the maximum allowable reverse voltage before breakdown for RD22S-T1-AT?
The maximum non-breakdown reverse voltage for RD22S-T1-AT is 17 V, defined as the test condition (VR) at which reverse current IR is guaranteed ≤2 μA. Operating above 17 V but below the minimum VZ (20.81 V) risks unpredictable leakage increase; sustained bias above 23.25 V will force full breakdown conduction. RD22S-T1-AT must be used within its specified VR and VZ bounds for reliable operation.
Can RD22S-T1-AT replace RD22S-T1-F in the same PCB layout?
Yes-RD22S-T1-AT and RD22S-T1-F share identical SOD-323 package dimensions, pinout, and absolute maximum ratings. The suffix difference denotes tape-and-reel packaging (T1-AT = 3000 pcs/reel, T1-F = 10000 pcs/reel); electrical characteristics and thermal performance are identical. RD22S-T1-AT can be substituted for RD22S-T1-F without layout or schematic changes.
What is the thermal resistance (RθJA) of RD22S-T1-AT on a standard PCB?
Renesas does not specify a single RθJA value for RD22S-T1-AT, but Fig.1 in D11444EJ6V0DS shows power derating: 200 mW at 25°C ambient drops to ~125 mW at 75°C and ~50 mW at 125°C on a 30 mm × 30 mm × 1.6 mm glass-epoxy PCB. Using the curve, RθJA is approximately 375°C/W at low power, decreasing with increasing power due to nonlinear thermal behavior. RD22S-T1-AT requires thermal-aware layout with adequate copper pour for sustained operation.
RD22S-T1-AT 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
RD22S-T1-AT FAQ
1.How can I place an order for RD22S-T1-AT through Aetrix?
Please submit a Request for Quotation (RFQ) for RD22S-T1-AT 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 RD22S-T1-AT reliable?
The price and inventory of RD22S-T1-AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RD22S-T1-AT is usually 5 days.
3.What payment methods are accepted for RD22S-T1-AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RD22S-T1-AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RD22S-T1-AT?
RD22S-T1-AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RD22S-T1-AT 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 RD22S-T1-AT?
For technical support, including RD22S-T1-AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RD22S-T1-AT requirements.
6.How does Aetrix verify that RD22S-T1-AT is sourced from the original manufacturer or authorized distributors?
All RD22S-T1-AT 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 RD22S-T1-AT meets industry standards.
7.What is the process for return or replacement of RD22S-T1-AT?
All RD22S-T1-AT units undergo pre-shipment inspection (PSI). If there is an issue with RD22S-T1-AT, 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 RD22S-T1-AT part is unused and in its original packaging.
Return procedure for RD22S-T1-AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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