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Taiwan Semiconductor Corporation SFAF802G
- Part No.:
- SFAF802G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- TO-220-2 Full Pack
- Datasheet:
-
SFAF802G.pdf
- Description:
- 35NS, 8A, 100V, SUPER FAST RECOV
- Quantity:
- Payment:
- Shipping:
Inventory:6,122
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Product details
Overview
SFAF802G from Taiwan Semiconductor is an 8A, 100V repetitive peak reverse voltage super fast rectifier diode in ITO-220AC package, featuring 35ns reverse recovery time, 0.95V forward voltage at 8A/25°C, and 4°C/W junction-to-case thermal resistance for high-efficiency DC-DC and switching-mode power conversion.
For engineers reviewing the SFAF802G datasheet, SFAF802G pinout, SFAF802G application, or SFAF802G equivalent, key selection criteria include VRRM=100V, trr=35ns, VF≤0.95V @8A, TJ(max)=150°C, and ITO-220AC mechanical compatibility with heatsink mounting requirements.
Technical Context
This super fast rectifier uses a glass-passivated single-die silicon junction optimized for low conduction loss and rapid carrier recombination. Its 35ns trr and 0.95V VF at rated current support high-frequency operation in SMPS topologies without sacrificing thermal margin.
The device operates across -55°C to +150°C junction temperature range, with 125A non-repetitive surge capability and 4°C/W RθJC, enabling robust performance in automotive-grade (AEC-Q101 optional) and industrial power supplies where reliability under transient stress is critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 100 V - Maximum repetitive reverse blocking voltage; defines usable input voltage headroom in flyback or boost converters |
| IF | 8 A - Continuous forward current rating; sets minimum heatsink sizing for steady-state conduction loss management |
| trr | 35 ns - Reverse recovery time; enables stable operation up to ~3 MHz switching frequency before significant switching loss penalty |
| VF @ 8A, 25°C | 0.95 V - Forward voltage drop; determines conduction loss of 7.6 W at full load, directly impacting efficiency and thermal design |
| RθJC | 4 °C/W - Junction-to-case thermal resistance; allows calculation of case temperature rise under load for mechanical mounting validation |
| IFSM | 125 A - Peak non-repetitive surge current; supports handling of inrush or fault transients without bond-wire failure |
| TJ(max) | 150 °C - Maximum junction temperature; sets upper limit for thermal design margin in enclosed or high-ambient environments |
Pinout & Package
ITO-220AC package: 3-terminal through-hole outline with isolated tab (cathode-connected), matte tin-plated leads, UL 94V-0 molding compound, and 0.56 N·m maximum mounting torque. Polarity marked on device body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input current entry point | Connected to switching node or transformer secondary; must withstand full reverse voltage during off-state |
| Cathode | Output current exit point | Electrically tied to metal tab; requires insulated mounting when referenced to non-ground potentials |
| Tab (Cathode) | Thermal and electrical cathode terminal | Serves as primary heat path to heatsink; electrically identical to cathode pin; isolation required if heatsink is grounded |
Key Features
| Feature | Design Value |
|---|---|
| Super fast recovery (trr = 35 ns) | Enables >1 MHz switching in compact SMPS designs while limiting reverse recovery charge and associated EMI |
| Glass passivated junction | Provides long-term stability against humidity and contamination in automotive and industrial environments |
| Low VF (0.95 V @ 8A) | Reduces conduction losses by ~15% vs. standard fast rectifiers, improving full-load efficiency and easing thermal constraints |
| High surge rating (IFSM = 125 A) | Withstands 8.3 ms half-sine surges common in AC line start-up or motor drive freewheeling without degradation |
| UL Recognized (E-326243) | Validates safety compliance for end-equipment certification in North American and global markets |
Applications
| DC-DC Converters | Switching Inverters |
|---|---|
Use Scenario: Secondary-side rectification in isolated 48V-to-12V buck-derived DC-DC modules for telecom and server power. 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 0.95V VF reduce switching losses by 22% versus standard fast diodes, enabling higher efficiency at 500 kHz operation. | Use Scenario: Freewheeling path in three-phase IGBT-based motor inverters for HVAC and industrial drives. IC Role / Device Role / Timing Role: Clamp diode conducting reactive energy during IGBT turn-off, requiring fast recovery to prevent cross-conduction. Use Value: 125A IFSM handles motor inductive kickback surges; 100V VRRM matches 600V-class IGBT bus derating requirements. |
| Automotive DC-DC | Industrial SMPS |
Use Scenario: 12V-to-5V/3.3V step-down converter in ADAS camera modules requiring AEC-Q101 compliance. IC Role / Device Role / Timing Role: Output rectifier in synchronous or quasi-resonant flyback topology operating at 300–600 kHz. Use Value: Glass passivation and -55°C to +150°C rating ensure reliability across automotive temperature cycles without parameter drift. | Use Scenario: Primary-side snubber and secondary-side output rectification in 1–3 kW industrial switch-mode power supplies. IC Role / Device Role / Timing Role: High-current freewheeling diode in LLC resonant converter secondary synchronous rectification stage. Use Value: 4°C/W RθJC enables direct mounting to aluminum heatsinks, reducing thermal interface layers and system footprint. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar super fast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH8L06D (STMicroelectronics) | VRRM = 600 V, trr = 30 ns, VF = 1.15 V @ 8A, TO-220AC package | Higher voltage rating suits universal-input PFC stages; slightly higher VF increases conduction loss | Select when 600V blocking is required and faster trr justifies 0.2V VF penalty |
| ES8D (ON Semiconductor) | VRRM = 200 V, trr = 35 ns, VF = 0.92 V @ 8A, TO-220AC package | Lower cost alternative with tighter VF tolerance but no AEC-Q101 option or UL recognition | Prefer for cost-sensitive industrial SMPS where automotive qualification is unnecessary |
Compared with STTH8L06D and ES8D, the SFAF802G offers optimal balance of 100V rating, 35ns trr, 0.95V VF, and UL/AEC-Q101 readiness-making it ideal for mid-voltage automotive and telecom DC-DC where reliability and thermal performance are prioritized over extreme voltage margin or lowest possible VF.
Availability
SFAF802G is available at Aetrix Electronics and suitable for DC-DC converters, switching inverters, automotive power modules, and industrial SMPS requiring stable component supply, consistent parametric performance, and long-term manufacturability.
Supply support for SFAF802G 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 computing markets since 1979.
The SFAF80xG series belongs to TSC's high-reliability super fast rectifier product line, engineered specifically for high-frequency, high-efficiency power conversion in thermally constrained and mission-critical applications.
FAQ
What is the maximum junction temperature rating for SFAF802G?
The SFAF802G has a maximum junction temperature (TJ(max)) of +150°C, verified per absolute maximum ratings in the official Taiwan Semiconductor datasheet Version L2106. This rating applies across the full operating current range and enables use in under-hood automotive and enclosed industrial power supplies where ambient temperatures exceed 85°C. Derating curves confirm 8A continuous current remains valid up to 125°C case temperature when mounted on a properly sized heatsink.
Is SFAF802G pin-compatible with other ITO-220AC rectifiers like STTH8R06D?
Yes, the SFAF802G uses the industry-standard ITO-220AC package with identical mechanical footprint, lead spacing, and tab configuration as STTH8R06D and similar devices. However, electrical characteristics differ: SFAF802G is rated for 100V VRRM and 0.95V VF, whereas STTH8R06D is 600V/1.15V. PCB layout reuse is mechanically feasible, but circuit validation is required due to voltage and loss differences.
Does SFAF802G meet AEC-Q101 reliability standards?
The base SFAF802G is not AEC-Q101 qualified; only the variant SFAF802GH carries that qualification. Per Taiwan Semiconductor's ordering information, the "H" suffix denotes AEC-Q101 compliance-including stress testing for temperature cycling, humidity bias, and high-temperature operating life. For automotive applications requiring qualification evidence, SFAF802GH-not SFAF802G-must be specified and procured.
What is the reverse recovery time (trr) specification for SFAF802G and how is it measured?
The SFAF802G has a maximum reverse recovery time (trr) of 35 ns, measured under conditions of IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A, per the Electrical Specifications table in the L2106 datasheet. This test uses a standardized half-sine waveform with defined di/dt and voltage slew rate, ensuring repeatable comparison across super fast rectifier families. The value reflects actual device physics-not typical or guaranteed min-and applies at TA = 25°C.
Can SFAF802G replace SFAF801G in a design?
Yes, SFAF802G can directly replace SFAF801G in most applications because both share identical package (ITO-220AC), current rating (8A), thermal performance (RθJC = 4°C/W), and recovery speed (trr = 35 ns). The only difference is VRRM: SFAF801G is rated for 50V, while SFAF802G is rated for 100V. Substituting SFAF802G provides increased reverse voltage margin without altering layout, thermal design, or control loop behavior.
SFAF802G 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):
- 100 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 @ 100 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
SFAF802G FAQ
1.How can I place an order for SFAF802G through Aetrix?
Please submit a Request for Quotation (RFQ) for SFAF802G 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 SFAF802G reliable?
The price and inventory of SFAF802G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SFAF802G is usually 5 days.
3.What payment methods are accepted for SFAF802G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SFAF802G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SFAF802G?
SFAF802G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SFAF802G 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 SFAF802G?
For technical support, including SFAF802G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SFAF802G requirements.
6.How does Aetrix verify that SFAF802G is sourced from the original manufacturer or authorized distributors?
All SFAF802G 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 SFAF802G meets industry standards.
7.What is the process for return or replacement of SFAF802G?
All SFAF802G units undergo pre-shipment inspection (PSI). If there is an issue with SFAF802G, 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 SFAF802G part is unused and in its original packaging.
Return procedure for SFAF802G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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