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Taiwan Semiconductor Corporation SR303 R0G
- Part No.:
- SR303 R0G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
SR303 R0G.pdf
- Description:
- DIODE SCHOTTKY 30V 3A DO201AD
- Quantity:
- Payment:
- Shipping:
Inventory:7,873
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Product details
Overview
SR303 R0G from Taiwan Semiconductor is a 3A, 30V Schottky barrier rectifier in DO-201AD package, featuring low forward voltage (0.55 V at 3 A, 25°C), high surge current capability (80 A), and AEC-Q101 qualification option. It serves as a primary output rectifier in compact DC/DC converters and AC/DC adapters where efficiency and thermal robustness are critical.
For engineers reviewing the SR303 R0G datasheet, SR303 R0G pinout, SR303 R0G application, or SR303 R0G equivalent, key selection criteria include its 30 V repetitive peak reverse voltage, 125°C maximum junction temperature (standard grade), 50 °C/W junction-to-ambient thermal resistance, and cathode-band polarity marking for unambiguous PCB layout.
Technical Context
This device uses a single-die Schottky structure with guard ring overvoltage protection, enabling stable operation under transient voltage stress. Its low VF minimizes conduction loss in high-frequency switching topologies, while the DO-201AD package supports through-hole mounting with 1.10 g mass and UL 94V-0 molding compound.
The SR303 R0G operates across –55°C to +125°C junction range (standard grade), delivers 500 µA max reverse leakage at 25°C and rated VR, and sustains 10 mA IR at 100°C - confirming suitability for thermally constrained industrial power stages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 30 V - Maximum repetitive reverse blocking voltage; defines safe operating limit in flyback or buck output stage |
| IF | 3 A - Continuous average forward current; sets minimum heatsinking requirement for sustained load |
| VF @ 3A, 25°C | 0.55 V - Low conduction loss enables >92% efficiency in 5–12 V output SMPS designs |
| IFSM | 80 A - Non-repetitive surge rating; withstands inrush and short-circuit transients without failure |
| TJ max | 125°C - Maximum junction temperature; determines derating curve for ambient temperatures above 50°C |
| RθJA | 50°C/W - Thermal resistance from junction to ambient; used to calculate required board copper area for thermal management |
| IR @ VR, 25°C | 500 µA - Reverse leakage level; impacts standby power in always-on auxiliary supplies |
Pinout & Package
DO-201AD package: axial leaded, molded plastic case with cathode band marking; leads are pure tin plated, solderable per J-STD-002, and pass JESD201 Class 2 whisker test.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential node (e.g., transformer secondary center-tap or switch node) |
| Cathode | Forward current exit point | Marked by colored band; connects to output filter capacitor positive terminal |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring structure | Enhances ruggedness against dv/dt-induced avalanche; supports reliable operation at 10,000 V/µs critical rate of rise |
| AEC-Q101 qualified version available | Enables use in automotive infotainment and body electronics where qualification is mandatory |
| RoHS & halogen-free | Complies with IEC 61249-2-21; meets environmental requirements for consumer and industrial end equipment |
| UL 94V-0 molding compound | Provides flame-retardant housing essential for safety-certified power adapters and industrial PSUs |
Applications
| Switching Mode Power Supply (SMPS) | AC/DC Adapter |
|---|---|
Use Scenario: Secondary-side rectification in 12 V/3 A offline flyback converter for industrial control modules. IC Role / Device Role / Timing Role: Schottky rectifier conducting during transformer demagnetization phase; replaces slower diodes to reduce switching loss. Use Value: 0.55 V VF lowers conduction loss by ~35% vs. standard PN diode, improving full-load efficiency from 86% to 90.5%. | Use Scenario: Output rectification in compact 5 V/3 A wall-mount adapter for IoT gateways. IC Role / Device Role / Timing Role: Unidirectional current path after transformer secondary; handles continuous 3 A DC with minimal thermal rise. Use Value: 50°C/W RθJA allows operation at 50°C ambient with no heatsink, reducing BOM cost and footprint. |
| DC/DC Converter | Industrial Motor Drive Auxiliary Supply |
Use Scenario: Synchronous rectifier replacement in isolated 24 V input → 5 V output buck-derived converter. IC Role / Device Role / Timing Role: Freewheeling path during high-side switch off-time; conducts reverse recovery–free current. Use Value: Zero reverse recovery charge eliminates snubber losses and EMI spikes common with fast recovery diodes. | Use Scenario: Bias supply rectification for gate drivers in 24 V DC motor control boards. IC Role / Device Role / Timing Role: Converts transformer-isolated 15 V AC to regulated 12 V DC for logic-level driver ICs. Use Value: 80 A IFSM withstands repeated start-up surges from capacitive loads without degradation. |
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-3EY30 | Same DO-201AD package, 3 A/30 V rating, VF = 0.54 V (typ), but not AEC-Q101 qualified | Preferred for cost-sensitive commercial power supplies where automotive qualification is unnecessary | Select when qualification is not required and tighter VF tolerance is prioritized |
| ON Semiconductor SB330 | DO-201AD, 3 A/30 V, VF = 0.52 V (typ), TJ max = 125°C, RoHS compliant, no AEC-Q101 variant | Suitable for consumer-grade adapters; lacks automotive traceability documentation | Choose for high-volume consumer designs needing marginally lower VF and broad distributor availability |
Compared with VS-3EY30 and SB330, the SR303 R0G provides verified AEC-Q101 qualification path (via SR303H variant), consistent 0.55 V VF performance across production lots, and explicit 125°C TJ max rating validated in TSC's thermal characterization curves - making it preferred for industrial and automotive-adjacent applications requiring long-term reliability evidence.
Availability
SR303 R0G is available at Aetrix Electronics and suitable for switching mode power supplies, AC/DC adapters, and DC/DC converters requiring stable component supply, consistent parametric performance, and traceable sourcing from an ISO 9001-certified manufacturer.
Supply support for SR303 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 Corporation (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, serving global power management and industrial markets since 1979.
The SR303 R0G belongs to TSC's SR3xx Schottky rectifier family, engineered specifically for high-efficiency, medium-current power conversion in space-constrained and thermally demanding environments.
FAQ
What is the maximum junction temperature rating for SR303 R0G?
The SR303 R0G has a maximum junction temperature (TJ max) of +125°C under standard grading. This rating is confirmed in the Absolute Maximum Ratings table of the official TSC datasheet (Version J2105), and applies to the non-AEC-Q101 variant. The AEC-Q101 qualified SR303H variant extends this to +150°C.
Does SR303 R0G have AEC-Q101 qualification?
No, SR303 R0G is the standard-grade version. AEC-Q101 qualification is available only for the SR303H variant, which carries the "H" suffix in the ordering code and is explicitly marked as qualified in TSC's ordering information table and product brief.
What does the "R0G" suffix mean in SR303 R0G?
The "R0G" suffix in SR303 R0G indicates green (halogen-free) compound packaging and standard reliability grade. Per TSC's ordering information, "R0G" denotes RoHS-compliant, halogen-free DO-201AD devices supplied in tape-and-reel packaging (1,250 units per reel).
What is the forward voltage of SR303 R0G at 3 A and 100°C junction temperature?
The SR303 R0G forward voltage is not specified at 100°C in the published datasheet. The datasheet provides VF = 0.55 V (max) only at IF = 3 A and TJ = 25°C. At elevated temperatures, VF decreases - typical behavior for Schottky diodes - but no guaranteed value is given for 100°C operation.
Is SR303 R0G pin-compatible with other DO-201AD Schottky rectifiers?
Yes, SR303 R0G uses the industry-standard DO-201AD package with axial leads and cathode-band polarity marking. It shares identical mechanical dimensions and terminal configuration with all DO-201AD rectifiers, including SR302–SR320 variants and equivalents like SB330 or VS-3EY30, enabling direct physical replacement on PCBs designed for that outline.
SR303 R0G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-201AD, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 30 V
- Current - Average Rectified (Io):
- 3A
- Voltage - Forward (Vf) (Max) @ If:
- 550 mV @ 3 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 500 µA @ 30 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201AD
- Operating Temperature - Junction:
- -55°C ~ 125°C
SR303 R0G FAQ
1.How can I place an order for SR303 R0G through Aetrix?
Please submit a Request for Quotation (RFQ) for SR303 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 SR303 R0G reliable?
The price and inventory of SR303 R0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SR303 R0G is usually 5 days.
3.What payment methods are accepted for SR303 R0G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SR303 R0G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SR303 R0G?
SR303 R0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SR303 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 SR303 R0G?
For technical support, including SR303 R0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SR303 R0G requirements.
6.How does Aetrix verify that SR303 R0G is sourced from the original manufacturer or authorized distributors?
All SR303 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 SR303 R0G meets industry standards.
7.What is the process for return or replacement of SR303 R0G?
All SR303 R0G units undergo pre-shipment inspection (PSI). If there is an issue with SR303 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 SR303 R0G part is unused and in its original packaging.
Return procedure for SR303 R0G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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