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Taiwan Semiconductor Corporation SFA802G
- Part No.:
- SFA802G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- TO-220-2
- Datasheet:
-
SFA802G.pdf
- Description:
- 35NS, 8A, 100V, SUPER FAST RECOV
- Quantity:
- Payment:
- Shipping:
Inventory:4,876
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Product details
Overview
SFA802G from Taiwan Semiconductor is an 8A, 100V super fast rectifier diode in TO-220AC package, featuring 35ns reverse recovery time, 0.975V forward voltage at 8A/25°C, and 125A surge capability-designed for high-efficiency DC-DC converters and switching inverters.
For engineers reviewing the SFA802G datasheet, SFA802G pinout, SFA802G application, or SFA802G equivalent, key selection factors include its AEC-Q101-qualified variant (SFA802GH), low VF trade-off vs. higher-voltage SFA80xG series, thermal resistance of 4°C/W, and single-die TO-220AC construction for industrial power conversion.
Technical Context
The SFA802G implements a single-die silicon PN junction optimized for super-fast recovery (trr = 35 ns) with low stored charge, enabling high-frequency operation in hard-switched topologies. Its 100V VRRM rating targets mid-range SMPS and freewheeling paths where efficiency and thermal management are critical.
Thermal performance is defined by a junction-to-case resistance of 4°C/W and maximum junction temperature of +150°C, supporting continuous 8A conduction when mounted on heatsinks per JESD201 Class 2 whisker-tested matte tin leads. Reverse leakage remains ≤10 µA at 25°C and ≤400 µA at 125°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 100 V - Maximum repetitive reverse blocking voltage; sets upper limit for DC bus or clamp voltage in converter designs |
| IF | 8 A - Continuous average forward current; defines steady-state power handling without forced cooling |
| IFSM | 125 A - Non-repetitive surge current (8.3 ms half-sine); supports inrush and fault-current tolerance |
| VF @ 8A, 25°C | 0.975 V - Forward voltage drop; directly determines conduction loss (7.8 W at 8A) |
| trr | 35 ns - Reverse recovery time; enables operation up to ~3–5 MHz in resonant or ZVS circuits |
| RθJC | 4 °C/W - Thermal resistance from junction to case; requires ≥25 cm² heatsink area for 8A continuous at TA=70°C |
| CJ @ 1MHz, 4V | 100 pF - Junction capacitance; impacts EMI and snubber design in high-dV/dt environments |
Pinout & Package
TO-220AC package: single-ended through-hole mounting with isolated tab (cathode-connected case), matte tin-plated leads compliant with J-STD-002 solderability, UL 94V-0 molding compound, and 0.56 N·m max mounting torque.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 1) | Forward current entry | Connected to input/source side in rectification; must handle full IF and IFSM |
| Cathode (Tab & Lead 2) | Forward current exit / heat path | Electrically and thermally connected to metal tab; requires insulating washer if mounted to grounded heatsink |
| No third lead | N/A | TO-220AC is 2-terminal device; no gate, control, or sense pins |
Key Features
| Feature | Design Value |
|---|---|
| Super-fast recovery (35 ns) | Reduces switching losses and EMI in high-frequency SMPS, enabling smaller passive components |
| Low VF (0.975 V @ 8A) | Lowers conduction loss by ~15% vs. standard fast rectifiers, improving system efficiency at medium load |
| AEC-Q101 qualification option (SFA802GH) | Validated for automotive under-hood applications including engine control and ADAS power supplies |
| Junction-to-case RθJC = 4°C/W | Enables compact thermal design with minimal heatsink mass for 8A continuous operation |
| Halogen-free & RoHS-compliant | Meets IEC 61249-2-21 and global environmental compliance requirements for industrial and automotive use |
Applications
| DC-DC Converters | Switching Inverters |
|---|---|
Use Scenario: Secondary-side synchronous rectification in isolated 48V-to-12V telecom or server PSUs operating at 200–500 kHz. IC Role / Device Role / Timing Role: Freewheeling diode providing unidirectional current path during low-side switch off-time. Use Value: 35 ns trr minimizes reverse recovery loss, while 0.975 V VF reduces conduction loss versus legacy FRDs-improving full-load efficiency by 0.8–1.2%. | Use Scenario: Output stage of 3-phase motor drive inverters with 10–20 kHz PWM switching. IC Role / Device Role / Timing Role: Anti-parallel freewheeling diode across IGBTs, clamping inductive kickback during turn-off. Use Value: 125 A IFSM withstands motor stall currents; 4°C/W RθJC allows direct heatsink mounting without thermal interface pads in space-constrained drives. |
| Industrial Power Supplies | Automotive DC-DC Modules |
Use Scenario: Input rectification in 1 kW industrial AC-DC front-ends with PFC + LLC topology. IC Role / Device Role / Timing Role: Boost diode in continuous conduction mode (CCM) PFC stage, conducting during MOSFET off-time. Use Value: Low CJ (100 pF) reduces capacitive turn-on loss; 100 V VRRM matches typical 80–90 V boost bus, avoiding overrating penalty. | Use Scenario: 12V/48V bidirectional DC-DC converter in 48V mild-hybrid vehicles. IC Role / Device Role / Timing Role: Isolation barrier rectifier in secondary-side synchronous rectification circuit. Use Value: AEC-Q101-qualified SFA802GH variant ensures reliability at -40°C to +150°C junction temp; RoHS/halogen-free compliance meets automotive material standards. |
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) | Same 8A/600V rating but higher VF (1.7 V @ 8A); trr = 35 ns; TO-220AC package | Better suited for 400–600 V systems; less efficient at 100 V due to higher VF | Select SFA802G for 100 V designs prioritizing conduction loss; STTH8L06D only if higher VRRM margin required |
| ON Semiconductor MUR8100E | 8A/100V, VF = 1.25 V @ 8A, trr = 35 ns, TO-220AC, AEC-Q101 qualified | Higher VF increases conduction loss by ~280 mW vs. SFA802G; identical thermal and surge specs | SFA802G preferred where <1.0 V VF is critical; MUR8100E acceptable if AEC-Q101 is mandatory and VF tolerance allows |
Compared with STTH8L06D and MUR8100E, the SFA802G delivers the lowest forward voltage (0.975 V) among 100 V-class 8A super fast rectifiers, directly reducing steady-state power loss-making it optimal for thermally constrained, high-efficiency 100 V DC-DC and inverter freewheeling applications.
Availability
SFA802G is available at Aetrix Electronics and suitable for DC-DC converters, switching inverters, and industrial power supplies requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for SFA802G 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 industrial, computing, and automotive markets since 1979.
The SFA802G belongs to TSC's Super Fast Rectifier family, engineered specifically for high-frequency switching power conversion where low VF, fast trr, and robust surge capability are essential-targeting efficiency-critical rectification in SMPS, UPS, and motor drives.
FAQ
What is the maximum junction temperature rating for the SFA802G?
The SFA802G has a maximum junction temperature (TJ MAX) of +150°C, verified per absolute maximum ratings in the official Taiwan Semiconductor datasheet Version K2103. This rating enables reliable operation in high-ambient environments such as enclosed industrial power supplies or under-hood automotive modules when properly heatsinked. Derating curves confirm 8A continuous current is sustainable up to 125°C case temperature.
Is the SFA802G pin-compatible with other TO-220AC rectifiers like the SFA801G or SFA803G?
Yes-the SFA802G shares identical TO-220AC mechanical dimensions, lead frame layout, and terminal polarity (anode on lead 1, cathode on tab/lead 2) with all SFA801G–SFA808G devices. This allows direct PCB footprint reuse across the family; however, electrical differences-including VRRM (100 V), VF (0.975 V), and CJ (100 pF)-must be validated per application requirements before substitution.
Does the SFA802G meet automotive qualification standards?
The base SFA802G is not AEC-Q101 qualified, but its variant SFA802GH is fully AEC-Q101 certified per Version K2103 documentation. The "H" suffix denotes qualification for automotive applications including engine control units and ADAS power supplies. Engineers requiring automotive-grade assurance must specify SFA802GH-not SFA802G-for such deployments.
What is the reverse recovery time (trr) specification for the SFA802G, and under what test conditions is it measured?
The SFA802G has a typical reverse recovery time (trr) of 35 ns, measured under conditions of IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A, as specified in the Electrical Specifications table of the Taiwan Semiconductor datasheet. This value is consistent across the SFA801G–SFA804G subgroup and reflects the device's suitability for high-frequency switching up to several MHz in resonant and soft-switching topologies.
How does the forward voltage (VF) of the SFA802G compare to higher-voltage variants in the same family?
At 8 A and 25°C, the SFA802G exhibits VF = 0.975 V-lower than SFA805G (1.300 V) and SFA807G (1.700 V) due to optimized doping and junction design for its 100 V rating. This lower VF directly reduces conduction loss: SFA802G dissipates 7.8 W vs. 10.4 W for SFA805G at 8 A, making it the most efficient choice within the SFA80xG family for 100 V applications.
SFA802G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- TO-220-2
- Packaging:
- Tube
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 100 V
- Current - Average Rectified (Io):
- 8A
- Voltage - Forward (Vf) (Max) @ If:
- 975 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:
- 100pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220AC
- Operating Temperature - Junction:
- -55°C ~ 150°C
SFA802G FAQ
1.How can I place an order for SFA802G through Aetrix?
Please submit a Request for Quotation (RFQ) for SFA802G 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 SFA802G reliable?
The price and inventory of SFA802G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SFA802G is usually 5 days.
3.What payment methods are accepted for SFA802G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SFA802G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SFA802G?
SFA802G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SFA802G 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 SFA802G?
For technical support, including SFA802G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SFA802G requirements.
6.How does Aetrix verify that SFA802G is sourced from the original manufacturer or authorized distributors?
All SFA802G 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 SFA802G meets industry standards.
7.What is the process for return or replacement of SFA802G?
All SFA802G units undergo pre-shipment inspection (PSI). If there is an issue with SFA802G, 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 SFA802G part is unused and in its original packaging.
Return procedure for SFA802G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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