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Taiwan Semiconductor Corporation SFAF2001G
- Part No.:
- SFAF2001G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- TO-220-2 Full Pack
- Datasheet:
-
SFAF2001G.pdf
- Description:
- 35NS, 20A, 50V, SUPER FAST RECOV
- Quantity:
- Payment:
- Shipping:
Inventory:2,016
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Product details
Overview
SFAF2001G from Taiwan Semiconductor is a 20A, 50V repetitive peak reverse voltage super fast rectifier diode in ITO-220AC package, featuring 0.975V max forward voltage at 20A/25°C, 35ns reverse recovery time, and glass passivated junction for high reliability-used in DC-DC converters and switching-mode power supplies.
For engineers reviewing the SFAF2001G datasheet, SFAF2001G pinout, SFAF2001G application, or SFAF2001G equivalent, key selection criteria include VRRM = 50V, IF = 20A, trr = 35ns, RθJC = 3°C/W, and AEC-Q101 qualification availability (SFAF2001GH variant), critical for automotive and industrial power conversion designs.
Technical Context
This single-die super fast rectifier uses planar epitaxial construction with glass passivation to achieve low forward voltage and fast reverse recovery. Its 35ns trr enables high-frequency operation in SMPS topologies while maintaining low conduction loss at 20A continuous forward current.
The ITO-220AC package provides direct-mount thermal path to heatsink with 3°C/W junction-to-case resistance, supporting stable operation up to 150°C junction temperature. UL 94V-0 molding compound and matte tin-plated leads ensure compliance with safety and solderability standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 50 V - Maximum non-repetitive reverse blocking voltage; defines minimum input/output isolation margin in buck/boost converters |
| IF | 20 A - Continuous average forward current; supports 200W+ output stages with appropriate heatsinking |
| trr | 35 ns - Reverse recovery time at IF = 0.5A, IR = 1.0A, Irr = 0.25A; enables >100 kHz switching without excessive switching loss |
| VF | 0.975 V max at 20A, 25°C - Low conduction loss reduces thermal stress and improves efficiency in high-current paths |
| RθJC | 3 °C/W - Junction-to-case thermal resistance; allows precise heatsink sizing for 150°C max TJ under full load |
| CJ | 170 pF at 1 MHz, 4V - Junction capacitance impacts EMI filtering requirements and snubber design in high-dv/dt circuits |
Pinout & Package
ITO-220AC package: 3-terminal through-hole outline with isolated metal tab (cathode-connected), matte tin-plated leads, UL 94V-0 mold compound, and polarity marked on device body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 1) | Input current entry point | Connected to high-side switch node or transformer secondary; must withstand 200A surge peaks |
| Cathode (Lead 2) | Output current exit point | Electrically tied to metal tab; serves as primary thermal and electrical return path to heatsink |
| Metal Tab (Cathode) | Thermal & electrical common | Provides low-inductance, low-resistance cathode connection and direct thermal interface to heatsink |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated chip junction | Prevents moisture ingress and surface degradation, enabling >10-year field reliability in humid environments |
| 35 ns reverse recovery time | Reduces switching losses by >40% vs. standard fast rectifiers at 100 kHz, improving overall converter efficiency |
| 0.975 V max forward voltage | Lowers conduction loss to ≤19.5 W at 20A, reducing heatsink size and system cost |
| UL Recognized File #E-326243 | Validates dielectric strength, flammability, and creepage/clearance for end-equipment safety certification |
| AEC-Q101 qualified option (SFAF2001GH) | Supports automotive-grade qualification testing including HTGB, HTRB, and temperature cycling for under-hood use |
Applications
| DC-DC Converter | Switching Inverter |
|---|---|
Use Scenario: Secondary-side rectification in isolated 48V–12V buck-derived converters for telecom and server PSUs. IC Role / Device Role / Timing Role: Super fast rectifier providing unidirectional current flow with minimal reverse recovery loss during high-frequency PWM transitions. Use Value: 35ns trr and 0.975V VF reduce total power loss by 2.1W per diode vs. standard FRD, improving 80 PLUS Titanium efficiency compliance. | Use Scenario: Freewheeling path in three-phase motor drive inverters operating at 8–20 kHz carrier frequency. IC Role / Device Role / Timing Role: Clamp inductive kickback energy during IGBT turn-off, requiring fast recovery to prevent cross-conduction and shoot-through. Use Value: 200A IFSM rating handles motor stall surges; 3°C/W RθJC enables direct mounting to shared heatsink with power switches. |
| Automotive DC-DC Module | Industrial SMPS |
Use Scenario: 12V–5V step-down conversion in ADAS domain controllers with AEC-Q101-compliant BOM requirement. IC Role / Device Role / Timing Role: Output rectifier in synchronous or quasi-resonant flyback topology, where low VF minimizes heat generation in confined enclosures. Use Value: SFAF2001GH variant meets AEC-Q101 stress tests; 150°C TJMAX supports operation near engine control units without derating. | Use Scenario: Input PFC boost diode and output rectifier in 1–3 kW industrial AC-DC front-ends. IC Role / Device Role / Timing Role: High-current freewheeling and rectification element subjected to repetitive 200A surge events during line transients. Use Value: Glass passivation and JESD201 Class 2 whisker resistance ensure long-term solder joint integrity in 24/7 factory automation systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar super fast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH2003D | VRRM = 300V, trr = 35ns, VF = 1.3V @ 20A - higher reverse rating but 35% higher forward loss | Requires redesign of input stage insulation for 300V systems; unsuitable for 50V bus applications without over-spec | Select only when higher VRRM margin is needed and thermal budget allows +7.4W conduction loss |
| VS-20EWH05-M3 | VRRM = 50V, trr = 30ns, VF = 0.92V @ 20A - slightly faster and lower VF, but TO-247AC package increases footprint | Requires PCB layout change due to larger TO-247AC outline and different mounting torque (1.1 N·m) | Prefer for new designs needing marginal performance gain if board space and assembly process allow TO-247AC |
Compared with STTH2003D and VS-20EWH05-M3, SFAF2001G offers optimal balance of 50V rating, 0.975V VF, and compact ITO-220AC footprint-making it ideal for space-constrained 50V industrial and automotive DC-DC modules where thermal resistance and manufacturability are prioritized.
Availability
SFAF2001G is available at Aetrix Electronics and suitable for DC-DC converters, switching inverters, and automotive power modules requiring stable component supply across production lifecycles.
Supply support for SFAF2001G 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, automotive, and consumer markets since 1979.
The SFAF series was developed specifically for high-efficiency, high-reliability power conversion applications demanding fast recovery, low forward drop, and robust thermal performance in compact packages like ITO-220AC.
FAQ
What is the maximum junction temperature rating for SFAF2001G?
The SFAF2001G has a maximum junction temperature (TJ) rating of +150°C, verified per absolute maximum ratings table. This allows continuous operation at full 20A forward current when case temperature is maintained ≤120°C using the specified ITO-220AC heatsink interface. Derating curves confirm usable current down to -55°C ambient, making SFAF2001G suitable for extended temperature industrial deployments.
Is SFAF2001G AEC-Q101 qualified?
The base SFAF2001G is not AEC-Q101 qualified; however, the SFAF2001GH variant-identical in all electrical and thermal specifications-is fully AEC-Q101 qualified per Version J2105 documentation. The "H" suffix denotes qualification including HTGB, HTRB, and temperature cycling tests required for automotive under-hood applications.
What is the reverse recovery time (trr) test condition for SFAF2001G?
SFAF2001G reverse recovery time is measured at IF = 0.5A, IR = 1.0A, and Irr = 0.25A, yielding a maximum trr of 35ns. This condition reflects real-world switching behavior in hard-commutated converters and is validated per JEDEC JESD24-11 methodology, ensuring consistent performance across production lots.
Does SFAF2001G have a built-in thermal protection feature?
No, SFAF2001G is a passive silicon rectifier diode and does not include integrated thermal shutdown or protection circuitry. Thermal management relies entirely on external design-specifically heatsink selection based on its 3°C/W RθJC and adherence to the forward current derating curve above 25°C case temperature.
What is the marking code format printed on the SFAF2001G device body?
The SFAF2001G is marked with "SFAF2001G" followed by date code (YWW), factory code "F", and "G" indicating green (halogen-free) compound per IEC 61249-2-21. Marking appears on the top surface of the ITO-220AC package and is laser-etched for permanent legibility during automated optical inspection and traceability audits.
SFAF2001G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- TO-220-2 Full Pack
- Packaging:
- Tube
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 50 V
- Current - Average Rectified (Io):
- 20A
- Voltage - Forward (Vf) (Max) @ If:
- 975 mV @ 20 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 35 ns
- Current - Reverse Leakage @ Vr:
- 10 µA @ 50 V
- Capacitance @ Vr, F:
- 170pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- ITO-220AC
- Operating Temperature - Junction:
- -55°C ~ 150°C
SFAF2001G FAQ
1.How can I place an order for SFAF2001G through Aetrix?
Please submit a Request for Quotation (RFQ) for SFAF2001G 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 SFAF2001G reliable?
The price and inventory of SFAF2001G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SFAF2001G is usually 5 days.
3.What payment methods are accepted for SFAF2001G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SFAF2001G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SFAF2001G?
SFAF2001G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SFAF2001G 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 SFAF2001G?
For technical support, including SFAF2001G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SFAF2001G requirements.
6.How does Aetrix verify that SFAF2001G is sourced from the original manufacturer or authorized distributors?
All SFAF2001G 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 SFAF2001G meets industry standards.
7.What is the process for return or replacement of SFAF2001G?
All SFAF2001G units undergo pre-shipment inspection (PSI). If there is an issue with SFAF2001G, 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 SFAF2001G part is unused and in its original packaging.
Return procedure for SFAF2001G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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