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Taiwan Semiconductor Corporation SR202 R0G
- Part No.:
- SR202 R0G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SR202 R0G.pdf
- Description:
- DIODE SCHOTTKY 20V 2A DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,593
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Product details
Overview
SR202 R0G from Taiwan Semiconductor is a 2 A, 20 V Schottky barrier rectifier in DO-204AC (DO-15) package, featuring low forward voltage drop (VF ≤ 0.55 V at 2 A, 25°C), high surge current capability (IFSM = 50 A), and AEC-Q101 qualification option. It serves as a primary output rectifier in compact AC/DC adapters and DC-DC converters where efficiency and thermal performance are critical.
For engineers reviewing the SR202 R0G datasheet, SR202 R0G pinout, SR202 R0G application, or SR202 R0G equivalent, key selection criteria include its 20 V VRRM rating, 0.55 V max VF at rated current, 50 A IFSM, junction-to-lead thermal resistance of 21.7°C/W, and DO-204AC mechanical compatibility with standard through-hole PCB layouts.
Technical Context
The SR202 R0G implements a single-die Schottky structure optimized for low conduction loss in low-voltage switching power supplies. Its 20 V repetitive peak reverse voltage and 500 µA max reverse leakage at 25°C support stable operation under light-load and standby conditions.
Thermally, it delivers RθJL = 21.7°C/W and RθJA = 75.0°C/W, enabling reliable 2 A continuous conduction in ambient temperatures up to 75°C without forced airflow. The device uses pure tin-plated leads compliant with J-STD-002 solderability standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 20 V - Maximum reverse blocking voltage; defines safe operating range in low-voltage secondary-side rectification |
| IF | 2 A - Continuous forward current rating; supports typical adapter output stages up to 24 W at 12 V |
| VF (max) | 0.55 V @ 2 A, 25°C - Low conduction loss reduces heat generation and improves system efficiency |
| IFSM | 50 A - Withstands 8.3 ms half-sine surge; handles inrush and transient overloads in SMPS |
| IR (max) | 500 µA @ 20 V, 25°C - Minimal leakage preserves no-load efficiency and standby power compliance |
| RθJL | 21.7°C/W - Enables direct thermal path to PCB copper; simplifies heatsinking in space-constrained designs |
| TJ max | 125°C - Rated junction temperature allows operation in sealed enclosures with limited airflow |
Pinout & Package
Package: DO-204AC (DO-15), axial-lead, epoxy-molded case with cathode band marking. Lead finish: pure tin, J-STD-002 compliant. Weight: ~0.400 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 1) | Input current entry point | Connected to transformer secondary or switch node; must route with low-inductance trace for EMI control |
| Cathode (Lead 2) | Output current exit point | Connected to output capacitor and load; polarity marked by visible band on body |
Key Features
| Feature | Design Value |
|---|---|
| Low forward voltage drop | VF ≤ 0.55 V at 2 A ensures <1.1 W conduction loss, reducing thermal stress in enclosed adapters |
| Guard ring structure | Enhances ruggedness against voltage transients and improves dv/dt immunity (10,000 V/µs) |
| AEC-Q101 qualification option | Available in H-grade variants (e.g., SR202H) for automotive infotainment and body electronics |
| RoHS & halogen-free | Complies with IEC 61249-2-21; supports green manufacturing and end-of-life recycling requirements |
| High surge current rating | 50 A IFSM enables robustness against line surges and startup inrush without derating |
Applications
| AC/DC Adapters | DC-DC Converters |
|---|---|
Use Scenario: Wall-mounted 5–12 V, 1–2 A power adapters for consumer electronics and IoT gateways. IC Role / Device Role / Timing Role: Output rectifier converting high-frequency transformer secondary AC to regulated DC. Use Value: 0.55 V VF minimizes dropout and heat rise in thermally constrained plastic housings. | Use Scenario: Point-of-load (POL) buck converter in industrial PLC I/O modules. IC Role / Device Role / Timing Role: Synchronous rectifier replacement in non-isolated 3.3–5 V output stages. Use Value: 50 A surge rating tolerates MOSFET shoot-through transients during control loop instability. |
| Switching Mode Power Supplies | Automotive Infotainment |
Use Scenario: Secondary-side rectification in 24–48 V telecom SMPS with >85% efficiency target. IC Role / Device Role / Timing Role: Main output diode in forward or flyback topology. Use Value: 21.7°C/W RθJL allows direct mounting to copper pour for passive thermal management. | Use Scenario: USB-C power delivery module in vehicle dashboard head units. IC Role / Device Role / Timing Role: Input protection and rectification stage before DC-DC regulation. Use Value: AEC-Q101 qualified variants (e.g., SR202H) meet automotive reliability and temperature cycling requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Vishay VS-2EY20 | Same DO-204AC package; VF = 0.54 V @ 2 A but VRRM = 20 V identical; IFSM = 50 A same; RθJL = 20°C/W slightly better | No AEC-Q101 variant offered; RoHS compliant but not halogen-free certified | Preferred where thermal margin is critical and automotive qualification is not required |
| ON Semiconductor SB220 | DO-204AC; VF = 0.55 V @ 2 A; VRRM = 20 V; IFSM = 50 A; RθJL = 22°C/W; AEC-Q101 available (SB220T3G) | Halogen-free status not explicitly declared per IEC 61249-2-21 | Drop-in alternative when dual sourcing across Taiwan Semiconductor and ON Semi is needed |
Compared with VS-2EY20 and SB220, the SR202 R0G uniquely combines halogen-free certification, AEC-Q101 availability, and consistent 0.55 V VF across production lots-making it preferred for medical-grade adapters and automotive-qualified designs requiring full material compliance.
Availability
SR202 R0G is available at Aetrix Electronics and suitable for AC/DC adapters, DC-DC converters, and switching mode power supplies requiring stable component supply, long-term BOM continuity, and RoHS/halogen-free compliance.
Supply support for SR202 R0G 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
Taiwan Semiconductor Company (TSC) is a vertically integrated Taiwanese manufacturer specializing in discrete power semiconductors, including rectifiers, TVS diodes, and MOSFETs, with global distribution and AEC-Q101 validation capability.
The SR202 R0G belongs to TSC's SR202–SR220 Schottky rectifier family, engineered for high-efficiency, low-voltage secondary-side rectification in cost-sensitive and thermally constrained power conversion systems.
FAQ
What is the maximum junction temperature rating for SR202 R0G?
The SR202 R0G has a maximum junction temperature (TJ) of +125°C under continuous operation. This rating allows reliable use in sealed enclosures and ambient temperatures up to 75°C when mounted on adequate PCB copper area. Derating curves in the datasheet define safe current limits above 25°C ambient.
Does SR202 R0G have AEC-Q101 qualification?
The base SR202 R0G is not AEC-Q101 qualified; however, the SR202H variant (with "H" suffix) is fully AEC-Q101 qualified. The R0G suffix indicates RoHS-compliant, halogen-free packaging. For automotive applications, specify SR202H or SR202HA0G depending on packaging needs.
What is the forward voltage drop of SR202 R0G at 2 A and 100°C junction temperature?
The datasheet specifies VF only at 25°C (≤0.55 V). At 100°C, VF decreases due to negative temperature coefficient of Schottky diodes; typical values fall to ~0.48–0.50 V at 2 A. No max value is guaranteed at elevated temperature, but conduction loss remains lower than at room temperature.
Is SR202 R0G compatible with lead-free reflow soldering processes?
Yes, SR202 R0G features pure tin-plated leads compliant with J-STD-002 for solderability, and its DO-204AC package withstands standard lead-free reflow profiles (peak ≤ 260°C). The epoxy molding compound meets UL 94V-0 flammability rating, supporting automated assembly reliability.
How does the guard ring structure in SR202 R0G improve reliability?
The guard ring in SR202 R0G mitigates edge breakdown under high dv/dt stress, increasing critical rate of rise of off-state voltage to 10,000 V/µs. This enhances immunity to switching noise and voltage spikes in fast-switching SMPS, reducing risk of premature failure during transient events.
SR202 R0G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-204AC, DO-15, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 20 V
- Current - Average Rectified (Io):
- 2A
- Voltage - Forward (Vf) (Max) @ If:
- 550 mV @ 2 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 500 µA @ 20 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AC (DO-15)
- Operating Temperature - Junction:
- -55°C ~ 125°C
SR202 R0G FAQ
1.How can I place an order for SR202 R0G through Aetrix?
Please submit a Request for Quotation (RFQ) for SR202 R0G 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 SR202 R0G reliable?
The price and inventory of SR202 R0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SR202 R0G is usually 5 days.
3.What payment methods are accepted for SR202 R0G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SR202 R0G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SR202 R0G?
SR202 R0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SR202 R0G 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 SR202 R0G?
For technical support, including SR202 R0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SR202 R0G requirements.
6.How does Aetrix verify that SR202 R0G is sourced from the original manufacturer or authorized distributors?
All SR202 R0G 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 SR202 R0G meets industry standards.
7.What is the process for return or replacement of SR202 R0G?
All SR202 R0G units undergo pre-shipment inspection (PSI). If there is an issue with SR202 R0G, 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 SR202 R0G part is unused and in its original packaging.
Return procedure for SR202 R0G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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