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Taiwan Semiconductor Corporation SFAF801G
- Part No.:
- SFAF801G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- TO-220-2 Full Pack
- Datasheet:
-
SFAF801G.pdf
- Description:
- 35NS, 8A, 50V, SUPER FAST RECOVE
- Quantity:
- Payment:
- Shipping:
Inventory:5,445
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Product details
Overview
SFAF801G from Taiwan Semiconductor is a single-die, glass-passivated super fast rectifier diode rated for 50 V repetitive peak reverse voltage (VRRM), 8 A average forward current (IF), and 125 A non-repetitive surge current (IFSM), optimized for high-efficiency DC-DC converters and freewheeling paths in switching power supplies.
For engineers reviewing the SFAF801G datasheet, SFAF801G pinout, SFAF801G application, or SFAF801G equivalent, key selection criteria include its 0.95 V forward voltage at 8 A/25°C, 35 ns reverse recovery time, 4 °C/W junction-to-case thermal resistance, ITO-220AC package with matte tin-plated leads, and AEC-Q101 qualification availability (SFAF801GH variant).
Technical Context
The SFAF801G employs a planar epitaxial silicon structure with glass passivation to achieve fast recovery (trr ≤ 35 ns) and low conduction loss. Its 50 V VRRM rating targets low-voltage, high-current switching topologies where voltage margin and thermal management are critical.
Designed for operation up to 150 °C junction temperature, it delivers stable performance under pulsed load conditions (0.3 ms pulse width, 1% duty cycle) and supports high-reliability industrial and automotive-grade designs when specified as AEC-Q101 qualified (SFAF801GH).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 50 V - Maximum blocking voltage in reverse bias; defines usable input/output voltage range in low-voltage SMPS stages |
| IF | 8 A - Continuous average forward current at case temperature ≤ 75 °C; sets minimum heatsink requirement |
| IFSM | 125 A - Peak non-repetitive surge current (8.3 ms half-sine); enables robustness against startup/load-dump transients |
| VF | 0.95 V max @ 8 A, 25 °C - Low conduction loss directly reduces power dissipation and improves system efficiency |
| trr | 35 ns max - Fast reverse recovery minimizes switching losses and EMI in high-frequency (>100 kHz) converters |
| RθJC | 4 °C/W - Enables predictable thermal design; 32 W max power dissipation before reaching 150 °C junction limit at 25 °C case |
| CJ | 90 pF typ @ 1 MHz, 4 V - Low junction capacitance reduces capacitive turn-on loss and improves high-frequency rectification fidelity |
Pinout & Package
Package: ITO-220AC - Insulated TO-220 variant with electrically isolated tab, UL 94V-0 molding compound, matte tin-plated leads compliant with J-STD-002, and 0.56 N·m maximum mounting torque.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 1) | Forward current entry point | Connected to source-side of switching node; polarity-marked on device body |
| Cathode (Lead 2) | Forward current exit / reverse-blocking terminal | Connected to output rail or ground return; electrically tied to isolated metal tab |
| Tab (Case) | Electrically isolated thermal path | Provides mechanical mounting and heat transfer without electrical connection; requires insulating washer if mounted to grounded heatsink |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enhances moisture resistance and long-term reliability under thermal cycling and humid environments |
| UL Recognized (E-326243) | Validates flammability (UL 94V-0), creepage/clearance, and construction compliance for end-equipment safety certification |
| AEC-Q101 qualification option | Confirms robustness for automotive under-hood applications including temperature cycling, HTRB, and ESD stress testing |
| Halogen-free (IEC 61249-2-21) | Meets environmental compliance requirements for RoHS and WEEE without compromising flame retardancy or process compatibility |
| JESD 201 Class 2 whisker resistance | Prevents tin whisker growth on matte tin leads, eliminating latent short-circuit risk in high-reliability systems |
Applications
| DC–DC Converters | Switching Inverters |
|---|---|
Use Scenario: Secondary-side synchronous rectification in isolated 12 V–48 V telecom and server PSUs operating at 200–500 kHz. IC Role / Device Role / Timing Role: Freewheeling diode providing low-loss current path during high-side switch off-time. Use Value: 0.95 V VF and 35 ns trr reduce conduction + switching losses by >15% vs. standard FRDs, improving full-load efficiency. | Use Scenario: Output stage rectification in 3-phase motor drive inverters with 400 V DC bus and PWM frequencies up to 20 kHz. IC Role / Device Role / Timing Role: Fast recovery diode clamping regenerative energy during IGBT commutation. Use Value: 125 A IFSM withstands motor stall surges; 4 °C/W RθJC enables direct heatsink mounting without thermal interface degradation. |
| Freewheeling Circuits | Industrial Power Supplies |
Use Scenario: Inductive load flyback protection in solenoid drivers and relay control modules with 24–48 V supply rails. IC Role / Device Role / Timing Role: Unidirectional current path absorbing stored inductor energy during switch turn-off. Use Value: 50 V VRRM provides sufficient margin over 48 V nominal; 90 pF CJ limits capacitive ringing during rapid voltage reversal. | Use Scenario: Input rectification in ruggedized 24 V/48 V industrial PLC power modules requiring extended lifetime and field reliability. IC Role / Device Role / Timing Role: Primary AC–DC or DC–DC stage rectifier handling continuous 8 A loads with transient overloads. Use Value: Glass passivation and JESD 201 Class 2 plating ensure >10-year operational life in vibration-prone factory environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar super fast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH8R06D | 600 V VRRM, 1.7 V VF @ 8 A, 50 ns trr, TO-220AC package | Higher voltage rating but higher VF and slower recovery; less efficient in low-VIN designs | Select only if system requires >50 V blocking margin or legacy board reuse with 600 V footprint |
| VS-8EWH06FN-M3 | 60 V VRRM, 0.92 V VF @ 8 A, 30 ns trr, TO-220AC package, AEC-Q101 qualified | Near-identical electrical specs; tighter VF and faster trr; certified for automotive use | Preferred for new automotive designs requiring drop-in validation; SFAF801GH matches this spec set with TSC qualification |
Compared with STTH8R06D and VS-8EWH06FN-M3, the SFAF801G offers optimal balance of low VF, fast trr, and cost-effective industrial qualification-making it ideal for 48 V-class power conversion where 50 V rating is sufficient and thermal performance is prioritized.
Availability
SFAF801G is available at Aetrix Electronics and suitable for DC–DC converters, switching inverters, and freewheeling circuits requiring stable component supply, consistent parametric performance across production lots, and long-term industrial lifecycle support.
Supply support for SFAF801G 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, specializing in power rectifiers, TVS devices, MOSFETs, and LED drivers.
The SFAF801G belongs to TSC's Super Fast Rectifier family, engineered specifically for high-frequency switching power supplies demanding low forward voltage, fast recovery, and robust thermal performance in compact ITO-220AC packaging.
FAQ
What is the maximum junction temperature rating for the SFAF801G?
The SFAF801G has a maximum junction temperature (TJ) of +150 °C, with an operating range from –55 °C to +150 °C. This rating allows reliable operation in high-ambient industrial environments when paired with appropriate heatsinking based on its 4 °C/W junction-to-case thermal resistance. Derating curves in the datasheet define safe IF limits above 75 °C case temperature.
Is the SFAF801G pin-compatible with other devices in the SFAF80xG series?
Yes, all SFAF80xG devices-including SFAF801G-share identical ITO-220AC packaging, pinout (anode, cathode, isolated tab), and mechanical dimensions. Voltage ratings differ across the series (50 V to 600 V), but PCB layout, mounting, and thermal interface design remain fully interchangeable.
Does the SFAF801G meet automotive reliability standards?
The base SFAF801G is not AEC-Q101 qualified; however, the SFAF801GH variant is explicitly qualified per AEC-Q101. Both share identical electrical and thermal specifications, differing only in test documentation and traceability-making SFAF801GH the recommended choice for automotive under-hood applications.
What is the reverse leakage current specification for the SFAF801G at elevated temperature?
At 100 °C junction temperature and rated reverse voltage (50 V), the SFAF801G exhibits a maximum reverse leakage current (IR) of 400 µA. At 25 °C, the limit is 10 µA. These values are measured using a 30 ms pulse, ensuring relevance to real-world transient blocking conditions in power converters.
How does the glass passivation in the SFAF801G improve long-term reliability?
Glass passivation protects the silicon die surface from moisture ingress, ionic contamination, and mechanical stress during thermal cycling. In the SFAF801G, this layer significantly extends mean time to failure (MTTF) in humid or chemically aggressive industrial environments-validated by TSC's accelerated life testing and JESD22-A108 humidity exposure protocols.
SFAF801G 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):
- 8A
- Voltage - Forward (Vf) (Max) @ If:
- 950 mV @ 8 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 35 ns
- Current - Reverse Leakage @ Vr:
- 10 µA @ 50 V
- Capacitance @ Vr, F:
- 90pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- ITO-220AC
- Operating Temperature - Junction:
- -55°C ~ 150°C
SFAF801G FAQ
1.How can I place an order for SFAF801G through Aetrix?
Please submit a Request for Quotation (RFQ) for SFAF801G 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 SFAF801G reliable?
The price and inventory of SFAF801G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SFAF801G is usually 5 days.
3.What payment methods are accepted for SFAF801G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SFAF801G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SFAF801G?
SFAF801G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SFAF801G 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 SFAF801G?
For technical support, including SFAF801G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SFAF801G requirements.
6.How does Aetrix verify that SFAF801G is sourced from the original manufacturer or authorized distributors?
All SFAF801G 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 SFAF801G meets industry standards.
7.What is the process for return or replacement of SFAF801G?
All SFAF801G units undergo pre-shipment inspection (PSI). If there is an issue with SFAF801G, 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 SFAF801G part is unused and in its original packaging.
Return procedure for SFAF801G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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