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Taiwan Semiconductor Corporation SRA1640 C0G
- Part No.:
- SRA1640 C0G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- TO-220-2
- Datasheet:
-
SRA1640 C0G.pdf
- Description:
- DIODE SCHOTTKY 40V 16A TO220AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,173
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Product details
Overview
SRA1640 from Taiwan Semiconductor is a 16A, 40V Schottky barrier rectifier in TO-220AC package, designed for high-efficiency DC/DC conversion and SMPS output stages. It delivers 0.55V forward voltage at 16A/25°C, supports 200A non-repetitive surge current, operates up to 150°C junction temperature, and features guard ring overvoltage protection for automotive-grade reliability.
For engineers reviewing the SRA1640 datasheet, SRA1640 pinout, SRA1640 application, or SRA1640 equivalent, key selection criteria include its 40V VRRM, low VF performance at high IF, thermal resistance of 5°C/W, AEC-Q101 qualification path (SRA1640H), and TO-220AC mechanical compatibility with standard heatsink mounting.
Technical Context
This single-die Schottky rectifier uses planar junction construction with integrated guard ring to suppress edge breakdown under transient overvoltage. Its low forward voltage drop minimizes conduction loss in high-current switching paths, while the 5°C/W junction-to-case thermal resistance enables stable operation at 16A continuous current with appropriate heatsinking.
The device is rated for repetitive peak reverse voltage of 40V and withstands 200A surge current (8.3ms half-sine) - critical for handling inrush and fault transients in power supplies. Reverse leakage remains ≤500µA at 25°C and ≤15mA at 100°C, supporting reliable blocking in warm ambient environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 40 V - Maximum repetitive reverse blocking voltage; defines safe operating limit in DC/DC flyback or buck output rectification |
| IF | 16 A - Continuous forward current rating; determines minimum heatsink size and PCB copper area for thermal management |
| VF | 0.55 V @ 16A, 25°C - Low conduction loss directly reduces power dissipation and improves system efficiency |
| IFSM | 200 A - Peak non-repetitive surge current capacity; ensures robustness against line surges and startup transients |
| RθJC | 5 °C/W - Junction-to-case thermal resistance; enables accurate thermal modeling when mounted to heatsink |
| TJ max | 150 °C - Maximum junction temperature; allows operation in high-ambient industrial or under-hood automotive environments |
| IR | ≤500 µA @ 40V, 25°C - Low reverse leakage preserves efficiency and stability in high-impedance bias networks |
Pinout & Package
Package: TO-220AC - Three-terminal, through-hole molded package with isolated tab (cathode-connected), matte tin-plated leads compliant with J-STD-002 solderability, UL 94V-0 molding compound, and 0.56 N·m maximum mounting torque.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input current entry point | Connected to switching node or transformer secondary; must handle full load current and high di/dt |
| Cathode | Output current exit point | Electrically tied to metal tab; requires insulated mounting if referenced to non-ground potential |
| Tab (Cathode) | Thermal and electrical cathode terminal | Primary heat transfer path to heatsink; electrically active - isolation required unless system ground referenced |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring structure | Prevents premature edge breakdown under voltage transients, improving reliability in unregulated input conditions |
| AEC-Q101 qualification path | Available as SRA1640H variant - meets stress test requirements for automotive power electronics |
| Low thermal resistance | 5°C/W RθJC enables compact thermal design without forced air cooling at 16A continuous load |
| High surge current capability | 200A IFSM supports designs requiring immunity to 100A+ line surges or capacitor charging spikes |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU RoHS directives - suitable for environmentally regulated industrial and consumer products |
Applications
| Server Power Supply Output Rectification | Automotive DC/DC Converter |
|---|---|
Use Scenario: High-current 12V output stage in 1U server PSUs delivering >800W with >94% efficiency targets. IC Role / Device Role / Timing Role: Primary output rectifier replacing synchronous MOSFETs where simplicity and cost outweigh marginal efficiency gains. Use Value: 0.55V VF at 16A reduces conduction loss by ~1.5W vs. higher-VF alternatives, easing thermal design in constrained airflow chassis. | Use Scenario: 48V-to-12V bidirectional DC/DC converter in 48V mild-hybrid vehicle architecture. IC Role / Device Role / Timing Role: Secondary-side freewheeling rectifier handling continuous 16A load with transient surge tolerance during regenerative braking events. Use Value: 200A IFSM and 150°C TJmax ensure survival during 100ms 50A surge pulses without derating. |
| Laptop Adapter Secondary Side | Industrial PLC Power Module |
Use Scenario: Compact 65W–90W AC/DC adapter with high power density and no-fan operation. IC Role / Device Role / Timing Role: Output rectifier in quasi-resonant flyback topology operating at 65–130kHz switching frequency. Use Value: Low 500µA reverse leakage at 25°C prevents standby power exceedance in Energy Star-compliant designs. | Use Scenario: 24V auxiliary power supply inside DIN-rail mounted programmable logic controller with 50°C ambient requirement. IC Role / Device Role / Timing Role: Input rectifier for isolated DC/DC module converting 48V bus to internal 5V/3.3V rails. Use Value: TO-220AC package allows direct bolt-down to metal chassis for passive cooling - eliminating need for discrete heatsink. |
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-16CTQ045 | 45V VRRM, 0.52V VF @ 16A, 4.5°C/W RθJC, TO-220AC | Slightly higher voltage rating but lower thermal resistance; same footprint and pinout | Preferred where margin above 40V blocking is needed or lower thermal impedance is critical |
| ON Semiconductor MBR1645G | 45V VRRM, 0.62V VF @ 16A, 6.0°C/W RθJC, TO-220AC | Higher forward voltage increases conduction loss; wider availability in standard distribution channels | Selected when supply chain priority outweighs 70mV VF penalty and 1°C/W thermal trade-off |
Compared with VS-16CTQ045 and MBR1645G, the SRA1640 offers optimal balance of 40V rating, 0.55V VF, and 5°C/W thermal resistance - making it ideal for cost-sensitive, thermally constrained 12V/24V output stages where exact VRRM margin is defined.
Availability
SRA1640 is available at Aetrix Electronics and suitable for switching mode power supplies, DC/DC converters, and adapters requiring stable component supply with industrial temperature range support and TO-220AC mechanical compatibility.
Supply support for SRA1640 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 power semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in rectifiers, TVS diodes, and MOSFETs for industrial and automotive markets.
The SRA16xx series was developed to deliver high-current Schottky rectification with AEC-Q101 readiness, low VF, and robust surge capability - targeting next-generation compact, high-efficiency power supplies in automotive and industrial equipment.
FAQ
What is the maximum junction temperature rating for SRA1640?
The SRA1640 has a maximum junction temperature (TJ) rating of 150°C, enabling reliable operation in high-ambient environments such as enclosed power supplies or under-hood automotive locations. This rating applies when the device is operated within its absolute maximum ratings and properly heatsinked per the 5°C/W RθJC specification. The SRA1640 datasheet confirms this value across all operating conditions.
Is SRA1640 pin-compatible with other TO-220AC Schottky rectifiers?
Yes, the SRA1640 uses the standard TO-220AC outline with anode, cathode, and cathode-connected tab configuration - matching industry-standard pinout for three-terminal Schottky rectifiers. Mechanical dimensions and lead spacing align with JEDEC TO-220AC specifications, allowing direct replacement in existing layouts without PCB modification. The SRA1640 marking diagram confirms polarity and terminal assignment.
Does SRA1640 meet automotive qualification standards?
The base SRA1640 is not AEC-Q101 qualified, but the SRA1640H variant is explicitly listed in the ordering information as AEC-Q101 qualified. This qualification covers temperature cycling, humidity testing, and mechanical stress validation required for automotive power modules. Engineers selecting for automotive use must specify SRA1640H - the SRA1640 itself is intended for industrial and commercial applications.
What is the typical forward voltage of SRA1640 at full rated current?
The typical forward voltage (VF) of the SRA1640 is 0.55 V at 16 A and 25°C junction temperature, as specified in the Electrical Specifications table. This value is measured under pulsed conditions (0.3 ms pulse width) to minimize self-heating. At elevated temperatures (e.g., 100°C), VF decreases slightly due to the negative temperature coefficient of Schottky diodes - a behavior confirmed in the SRA1640 forward characteristics curve.
How does the guard ring feature improve SRA1640 reliability?
The guard ring in the SRA1640 mitigates edge breakdown by redistributing electric field concentration at the silicon periphery, increasing the device's effective VRRM margin during voltage transients. This structural enhancement improves long-term reliability in applications with unclamped inductive kickback or line surges - such as SMPS output stages without snubbers. The SRA1640 datasheet explicitly cites guard ring as a key feature for overvoltage protection.
SRA1640 C0G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- TO-220-2
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 40 V
- Current - Average Rectified (Io):
- 16A
- Voltage - Forward (Vf) (Max) @ If:
- 550 mV @ 16 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 500 µA @ 40 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220AC
- Operating Temperature - Junction:
- -55°C ~ 125°C
SRA1640 C0G FAQ
1.How can I place an order for SRA1640 C0G through Aetrix?
Please submit a Request for Quotation (RFQ) for SRA1640 C0G 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 SRA1640 C0G reliable?
The price and inventory of SRA1640 C0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SRA1640 C0G is usually 5 days.
3.What payment methods are accepted for SRA1640 C0G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SRA1640 C0G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SRA1640 C0G?
SRA1640 C0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SRA1640 C0G 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 SRA1640 C0G?
For technical support, including SRA1640 C0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SRA1640 C0G requirements.
6.How does Aetrix verify that SRA1640 C0G is sourced from the original manufacturer or authorized distributors?
All SRA1640 C0G 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 SRA1640 C0G meets industry standards.
7.What is the process for return or replacement of SRA1640 C0G?
All SRA1640 C0G units undergo pre-shipment inspection (PSI). If there is an issue with SRA1640 C0G, 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 SRA1640 C0G part is unused and in its original packaging.
Return procedure for SRA1640 C0G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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