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Taiwan Semiconductor Corporation SR306
- Part No.:
- SR306
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
SR306.pdf
- Description:
- DIODE SCHOTTKY 60V 3A DO201AD
- Quantity:
- Payment:
- Shipping:
Inventory:3,050
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Product details
Overview
SR306 from Taiwan Semiconductor is a 3A, 60V 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, used in high-efficiency DC-DC converters and industrial power adapters.
For engineers reviewing the SR306 datasheet, SR306 pinout, SR306 application, or SR306 equivalent, key selection criteria include its AEC-Q101-qualified variants (SR306H), 80A surge rating, 15°C/W junction-to-case thermal resistance, and DO-201AD mechanical compatibility with legacy through-hole layouts.
Technical Context
The SR306 operates as a single-die Schottky rectifier optimized for low-loss switching applications, with a repetitive peak reverse voltage of 60V and critical dv/dt rating of 10,000 V/µs to suppress transient-induced turn-on. Its guard ring structure provides overvoltage protection while maintaining fast recovery characteristics.
Thermally, it delivers 50°C/W junction-to-ambient resistance under standard PCB mounting, enabling stable 3A continuous operation up to 125°C junction temperature - or 150°C for AEC-Q101-qualified versions - without forced cooling in compact power stages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 60 V - Maximum reverse blocking capability for 60V-rated SMPS output stages |
| IF | 3 A - Continuous forward current rating defining minimum trace width and heatsinking |
| VF @ 3A, 25°C | ≤0.70 V - Low conduction loss enabling >92% efficiency in 12V→5V buck converters |
| IR @ 60V, 100°C | ≤5 mA - Leakage-controlled thermal stability in high-temperature adapter environments |
| IFSM | 80 A - Withstands 8.3ms half-sine surges during cold-start or load dump events |
| RθJC | 15 °C/W - Enables direct heatsink mounting for thermally constrained industrial modules |
| TJ max | 125 °C - Standard operating limit; 150 °C available in AEC-Q101-qualified SR306H variant |
Pinout & Package
DO-201AD axial-leaded package with cathode band marking; leads are pure tin-plated, solderable per J-STD-002, and meet JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (lead without band) | Input current terminal | Connected to input rail or switch node; requires clearance for 60V working voltage |
| Cathode (lead with band) | Output current terminal | Connected to output filter capacitor; polarity-sensitive placement prevents reverse bias failure |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring overvoltage protection | Prevents premature avalanche breakdown under line transients, extending reliability in unregulated AC/DC front-ends |
| AEC-Q101 qualification option (SR306H) | Validated for automotive under-hood temperature cycling and vibration, supporting 15-year service life claims |
| UL 94V-0 molding compound | Meets flame-retardancy requirements for enclosed power supplies in medical and industrial enclosures |
| Halogen-free construction (IEC 61249-2-21) | Complies with RoHS and WEEE directives without compromising thermal or mechanical performance |
Applications
| Server Power Supply | Industrial DC-DC Converter |
|---|---|
Use Scenario: Secondary-side synchronous rectification in 48V→12V telecom power modules. IC Role / Device Role / Timing Role: Schottky rectifier replacing MOSFETs in cost-sensitive designs where gate drive complexity must be avoided. Use Value: 0.70V VF reduces conduction loss by ~35% vs. standard silicon diodes, lowering thermal stress on adjacent controllers. | Use Scenario: Output rectification in isolated 24V→5V flyback converters for PLC I/O modules. IC Role / Device Role / Timing Role: Primary freewheeling path during transformer reset, handling 3A continuous and 80A surge currents. Use Value: 15°C/W RθJC allows direct heatsink attachment, eliminating need for thermal vias in 4-layer PCBs. |
| Automotive Body Control Module | Consumer Adapter |
Use Scenario: Reverse-polarity protection and load dump clamping in 12V battery-fed ECUs. IC Role / Device Role / Timing Role: Bidirectional clamp when paired with TVS; functions as low-VF forward path during normal operation. Use Value: AEC-Q101-qualified SR306H variant ensures 150°C operation and withstands 10,000 V/µs dv/dt spikes from relay switching. | Use Scenario: Output rectification in compact 19V laptop adapters with <15mm height constraint. IC Role / Device Role / Timing Role: High-efficiency rectifier minimizing heat buildup in sealed plastic housings. Use Value: 50°C/W RθJA enables natural convection cooling without heatsinks, reducing BOM cost and assembly steps. |
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-3EJH06-M3/54 | Same DO-201AD package, 3A/60V rating, but VF = 0.72V (max) and IR = 100µA @ 25°C | Higher leakage at elevated temperature limits use in >85°C ambient industrial enclosures | Preferred where lower room-temperature leakage is prioritized over high-temp stability |
| ON Semiconductor SB360-E3/54 | DO-201AD, 3A/60V, VF = 0.72V (max), IR = 500µA @ 25°C, no AEC-Q101 option | Lacks automotive qualification and has higher 100°C IR (10mA vs. SR306's 5mA) | Suitable for commercial-grade adapters but not for automotive or extended-temperature industrial use |
Compared with VS-3EJH06-M3/54 and SB360-E3/54, SR306 offers tighter high-temperature leakage control and AEC-Q101 availability - critical for automotive body electronics and industrial systems operating above 85°C ambient.
Availability
SR306 is available at Aetrix Electronics and suitable for switching mode power supplies, DC-DC converters, and industrial adapters requiring stable component supply across multi-year production cycles.
Supply support for SR306 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 and automotive markets since 1979.
The SR302–SR320 family was designed specifically for high-reliability, high-efficiency rectification in cost-sensitive industrial and automotive power conversion systems, balancing thermal robustness, surge resilience, and regulatory compliance.
FAQ
What is the maximum junction temperature for SR306?
The SR306 has a maximum junction temperature of 125°C under standard qualification. An AEC-Q101-qualified version, SR306H, supports operation up to 150°C. This distinction is critical for thermal design in enclosed or high-ambient environments - always verify the suffix when selecting for temperature-critical applications. The SR306 datasheet specifies derating curves starting at 25°C ambient.
Does SR306 have AEC-Q101 qualification?
The base SR306 is not AEC-Q101 qualified; only the SR306H variant carries this automotive qualification. SR306H undergoes additional stress testing including temperature cycling, highly accelerated life testing (HALT), and board-level vibration per AEC-Q101 Rev D. For automotive body control or lighting modules, SR306H must be specified explicitly - SR306 alone does not meet automotive reliability requirements.
What is the forward voltage drop of SR306 at rated current?
The SR306 exhibits a maximum forward voltage drop of 0.70 V at 3 A and 25°C junction temperature, measured under pulse conditions (PW = 0.3 ms). At higher temperatures (e.g., 100°C), VF decreases slightly due to Schottky physics, but system-level conduction loss calculations should use the 0.70 V max value for worst-case thermal design of the SR306.
How does SR306 compare to SR305 in terms of electrical performance?
SR305 and SR306 share identical ratings: both are 3A, 60V Schottky rectifiers with 0.70 V max VF at 3A/25°C and 5 mA max IR at 100°C. They differ only in marking code and reel packaging - SR305 is marked "SR305" and SR306 is marked "SR306". Electrically and thermally, SR305 and SR306 are interchangeable in all applications where the DO-201AD package fits.
What packaging options are available for SR306?
SR306 is supplied in DO-201AD package with two standard packing formats: 1,250 units per tape-and-reel (ordering code SR306) and 500 units per ammo box (ordering code SR306A0G). AEC-Q101-qualified versions use suffix "H" (e.g., SR306H, SR306HA0G). All variants feature pure tin-plated leads compliant with J-STD-002 solderability standards.
SR306 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-201AD, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 60 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 @ 60 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201AD
- Operating Temperature - Junction:
- -55°C ~ 150°C
SR306 FAQ
1.How can I place an order for SR306 through Aetrix?
Please submit a Request for Quotation (RFQ) for SR306 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 SR306 reliable?
The price and inventory of SR306 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SR306 is usually 5 days.
3.What payment methods are accepted for SR306?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SR306 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SR306?
SR306 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SR306 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 SR306?
For technical support, including SR306 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SR306 requirements.
6.How does Aetrix verify that SR306 is sourced from the original manufacturer or authorized distributors?
All SR306 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 SR306 meets industry standards.
7.What is the process for return or replacement of SR306?
All SR306 units undergo pre-shipment inspection (PSI). If there is an issue with SR306, 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 SR306 part is unused and in its original packaging.
Return procedure for SR306:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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