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Taiwan Semiconductor Corporation SR305 R0G
- Part No.:
- SR305 R0G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
SR305 R0G.pdf
- Description:
- DIODE SCHOTTKY 50V 3A DO201AD
- Quantity:
- Payment:
- Shipping:
Inventory:2,146
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Product details
Overview
SR305 R0G from Taiwan Semiconductor is a 3A, 50V Schottky barrier rectifier in DO-201AD package, featuring 0.70V max forward voltage at 3A and 5mA max reverse current at 100°C junction temperature. It delivers high efficiency in DC/DC converters and switching power supplies with 80A surge capability and AEC-Q101 qualification available in variant SR305H.
For engineers reviewing the SR305 R0G datasheet, SR305 R0G pinout, SR305 R0G application, or SR305 R0G equivalent, key selection factors include its 50V VRRM rating, thermal resistance (RθJA = 50°C/W), low VF performance, DO-201AD mechanical compatibility, and automotive-grade qualification path via SR305H.
Technical Context
This Schottky rectifier uses a single-die construction with guard ring overvoltage protection and pure tin-plated leads compliant with J-STD-002 solderability. Its 10,000 V/µs dv/dt rating supports fast-switching topologies while maintaining stable reverse blocking up to 50V.
Rated for continuous operation from –55°C to +125°C (with extended option to +150°C), it achieves 3A average forward current with derating above 75°C ambient, supported by validated thermal performance: RθJC = 15°C/W and RθJA = 50°C/W under standard JEDEC conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 50 V - Maximum repetitive reverse voltage before breakdown; defines safe operating range in 48V bus or 36V input SMPS designs. |
| IF | 3 A - Continuous average forward current; supports mid-power adapter and DC/DC output stages without forced cooling. |
| VF @ 3A, 25°C | ≤ 0.70 V - Low conduction loss enabling >92% efficiency in 12V-output buck converters at full load. |
| IR @ 50V, 100°C | ≤ 5 mA - Controlled leakage ensures minimal standby power loss in always-on industrial control modules. |
| IFSM (8.3ms) | 80 A - Withstands inrush surges during hot-plug events in telecom power modules and PoE injectors. |
| TJ max | 125 °C - Enables operation in sealed enclosures with limited airflow, such as LED drivers and motor control PCBs. |
| RθJA | 50 °C/W - Requires ≥1.5 cm² copper pour on FR-4 for natural convection cooling at full 3A load. |
Pinout & Package
DO-201AD axial-leaded package with cathode band marking; 1.10g weight; UL 94V-0 molding compound; polarity indicated by single black band at cathode end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (lead without band) | Forward current entry point | Connected to lower-potential side (e.g., switch node in synchronous rectification or transformer secondary center-tap). |
| Cathode (lead with black band) | Forward current exit / reverse blocking terminal | Connected to output rail or positive bus; reverse voltage applied between cathode and anode. |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring structure | Prevents premature edge breakdown under transient overvoltage, improving reliability in unregulated input stages. |
| AEC-Q101 qualified variant (SR305H) | Validated for automotive under-hood applications including body control modules and ADAS power rails. |
| RoHS & halogen-free (IEC 61249-2-21) | Meets global environmental compliance requirements for industrial and consumer electronics manufacturing. |
| JESD 201 Class 2 whisker resistance | Ensures long-term solder joint integrity in high-reliability applications subject to thermal cycling. |
Applications
| Server Power Supply | Industrial DC/DC Converter |
|---|---|
Use Scenario: Secondary-side rectification in 48V-to-12V isolated buck-derived converters for rack-mounted servers. IC Role / Device Role / Timing Role: Schottky rectifier replacing diode in synchronous rectification topology or used standalone for simplicity and cost control. Use Value: 0.70V VF minimizes conduction loss at 3A load, reducing heat sink size and improving power density vs. silicon diodes. | Use Scenario: Output rectification in 24V-input, 5V/3A industrial PLC I/O power modules. IC Role / Device Role / Timing Role: Primary freewheeling and output rectification device in non-isolated buck regulators. Use Value: 80A IFSM withstands repeated motor startup surges without degradation, supporting robust field deployment. |
| Automotive Body Control Unit | USB-C PD Adapter |
Use Scenario: Reverse polarity protection and 12V system rectification in BCM power distribution boards. IC Role / Device Role / Timing Role: Input protection rectifier with guard ring ensuring immunity to load dump transients. Use Value: AEC-Q101-qualified SR305H variant provides validated reliability for 15-year automotive service life. | Use Scenario: Secondary-side rectification in compact 65W USB-C PD adapters with 20V output. IC Role / Device Role / Timing Role: High-efficiency output rectifier in quasi-resonant flyback topology. Use Value: Low RθJA (50°C/W) and 125°C TJ max enable operation in thermally constrained plastic enclosures. |
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-3EJH05-M3/5BT | Same DO-201AD package, 3A/50V rating, VF = 0.72V max at 3A, but not AEC-Q101 qualified. | Lacks automotive qualification; suitable for commercial-grade adapters and industrial SMPS where qualification is not mandated. | Select when AEC-Q101 is unnecessary and Vishay supply chain alignment is preferred. |
| ON Semiconductor SB350-E3/54 | DO-201AD, 3A/50V, VF = 0.75V max at 3A, IR = 100 µA at 25°C (tighter than SR305 R0G's 500 µA spec). | Better low-temp leakage performance; slightly higher VF increases conduction loss marginally in high-ambient environments. | Choose for low-leakage priority in battery-backed systems or cold-storage equipment. |
Compared with VS-3EJH05-M3/5BT and SB350-E3/54, SR305 R0G offers the lowest VF among 50V 3A Schottkys in DO-201AD (0.70V max), balanced by higher IR at elevated temperature-making it optimal for warm-environment, efficiency-critical DC/DC outputs where surge robustness matters.
Availability
SR305 R0G is available at Aetrix Electronics and suitable for switching mode power supplies, DC/DC converters, and AC adapters requiring stable component supply with consistent DO-201AD lead form and thermal performance.
Supply support for SR305 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 industrial, computing, and automotive markets since 1979.
The SR302–SR320 series was designed specifically for high-efficiency, medium-current rectification in space-constrained power supplies-emphasizing low VF, robust surge handling, and AEC-Q101 scalability across voltage grades.
FAQ
What is the maximum junction temperature rating for SR305 R0G?
The SR305 R0G has a maximum junction temperature (TJ) of +125°C under standard operating conditions. This rating allows reliable operation in sealed enclosures or high-ambient environments typical of industrial motor drives and LED lighting systems. The SR305 R0G datasheet confirms this limit applies to the base part; extended TJ operation to +150°C is only specified for AEC-Q101-qualified variants like SR305H.
Does SR305 R0G meet automotive qualification standards?
The SR305 R0G itself is not AEC-Q101 qualified; however, the SR305H variant-identical in electrical and thermal specs but with additional stress testing-is fully AEC-Q101 certified. SR305 R0G remains suitable for commercial and industrial applications where automotive qualification is not required, such as consumer adapters and factory automation controllers.
What is the forward voltage specification for SR305 R0G at rated current?
SR305 R0G has a maximum forward voltage (VF) of 0.70 V at 3 A and 25°C junction temperature, per the manufacturer's electrical specifications table. This value is measured under pulsed conditions (PW = 0.3 ms) and represents the upper bound for design margining; typical units measure ~0.58–0.65 V under identical conditions.
How does the reverse leakage current of SR305 R0G behave at elevated temperature?
At 100°C junction temperature and rated 50 V reverse voltage, SR305 R0G exhibits ≤5 mA reverse current (IR). This is significantly higher than its 25°C leakage (≤500 µA), reflecting expected Schottky behavior. Designers must account for this increase in standby power calculations for thermally demanding applications like enclosed power bricks.
What packaging options are available for SR305 R0G?
SR305 R0G is supplied in DO-201AD package on tape-and-reel (1,250 units per reel). The "R0G" suffix indicates green (halogen-free) compound and standard commercial qualification. No ammo box or bulk packaging is assigned to the R0G variant-those options apply only to codes ending in "A0G" (e.g., SR305 A0G).
SR305 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):
- 50 V
- Current - Average Rectified (Io):
- 3A
- Voltage - Forward (Vf) (Max) @ If:
- 700 mV @ 3 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 500 µA @ 50 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201AD
- Operating Temperature - Junction:
- -55°C ~ 150°C
SR305 R0G FAQ
1.How can I place an order for SR305 R0G through Aetrix?
Please submit a Request for Quotation (RFQ) for SR305 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 SR305 R0G reliable?
The price and inventory of SR305 R0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SR305 R0G is usually 5 days.
3.What payment methods are accepted for SR305 R0G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SR305 R0G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SR305 R0G?
SR305 R0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SR305 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 SR305 R0G?
For technical support, including SR305 R0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SR305 R0G requirements.
6.How does Aetrix verify that SR305 R0G is sourced from the original manufacturer or authorized distributors?
All SR305 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 SR305 R0G meets industry standards.
7.What is the process for return or replacement of SR305 R0G?
All SR305 R0G units undergo pre-shipment inspection (PSI). If there is an issue with SR305 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 SR305 R0G part is unused and in its original packaging.
Return procedure for SR305 R0G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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