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Taiwan Semiconductor Corporation SFA804G
- Part No.:
- SFA804G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- TO-220-2
- Datasheet:
-
SFA804G.pdf
- Description:
- DIODE GEN PURP 200V 8A TO220AC
- Quantity:
- Payment:
- Shipping:
Inventory:992
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Product details
Overview
SFA804G from Taiwan Semiconductor is an 8A, 200V super fast rectifier diode in TO-220AC package, designed for high-efficiency DC-DC conversion and freewheeling paths in switching power supplies. It delivers VF = 0.975 V at IF = 8 A and TJ = 25°C, trr = 35 ns, RθJC = 4°C/W, and supports TJ up to 150°C.
For engineers reviewing the SFA804G datasheet, SFA804G pinout, SFA804G application, or SFA804G equivalent, key selection criteria include forward voltage drop under full load, reverse recovery speed in high-frequency SMPS, thermal resistance for heatsink design, and AEC-Q101 qualification status for automotive-grade reliability validation.
Technical Context
The SFA804G is a single-die, unidirectional super fast recovery rectifier optimized for 200V repetitive peak reverse voltage (VRRM) operation. Its 35 ns reverse recovery time and low 0.975 V forward voltage at 8 A enable reduced switching losses in 100–500 kHz converters.
Thermally, it features a junction-to-case resistance of 4°C/W and operates across –55°C to +150°C junction temperature range. The TO-220AC package uses matte tin-plated leads compliant with J-STD-002 solderability standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 200 V - Maximum non-repetitive reverse blocking voltage; defines safe operating limit in flyback/clamp circuits |
| IF | 8 A - Continuous average forward current; sets minimum heatsink sizing for sustained conduction |
| VF @ 8A, 25°C | 0.975 V - Forward voltage drop at rated current; directly determines I²R conduction loss in power stage |
| trr | 35 ns - Reverse recovery time; critical for minimizing turn-off switching loss and EMI in high-frequency SMPS |
| RθJC | 4°C/W - Thermal resistance from junction to case; enables accurate case temperature prediction under load |
| IFSM | 125 A - Non-repetitive surge current rating; supports inrush and fault-current handling without failure |
Pinout & Package
Package: TO-220AC - Three-terminal, through-hole plastic package with isolated tab; mounting torque ≤ 0.56 N·m; UL 94V-0 rated molding compound; polarity marked on device body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 1) | Forward current entry point | Connected to input/high-side node in freewheeling or output rectification path |
| Cathode (Lead 2) | Forward current exit point | Connected to ground or low-side return; electrically tied to metal tab in standard TO-220AC |
| Tab (Case) | Thermal and electrical connection | Internally connected to cathode; provides primary heat path to heatsink; must be electrically isolated if cathode is not at ground potential |
Key Features
| Feature | Design Value |
|---|---|
| Super fast recovery (trr = 35 ns) | Enables efficient operation in 200–500 kHz switching converters without excessive turn-off loss or ringing |
| Low VF = 0.975 V @ 8 A | Reduces conduction loss by ~15% vs. standard fast rectifiers, improving system efficiency at full load |
| TO-220AC package with RθJC = 4°C/W | Supports >6 W continuous power dissipation with standard 10°C/W heatsink, simplifying thermal design |
| AEC-Q101 qualified option (SFA804GH) | Validated for automotive under-hood applications including engine control and ADAS power modules |
Applications
| DC-DC Converter | Switching Inverter |
|---|---|
Use Scenario: Secondary-side synchronous rectification in isolated 48 V–12 V buck-derived DC-DC modules for telecom and server PSUs. IC Role / Device Role / Timing Role: Freewheeling rectifier conducting during low-side switch off-time; handles 8 A average current with minimal voltage drop. Use Value: 0.975 V VF reduces conduction loss by 0.78 W vs. 1.075 V alternative, lowering thermal stress and enabling smaller heatsinks. | Use Scenario: Output rectification in 3 kW solar microinverter H-bridge output stage operating at 25 kHz. IC Role / Device Role / Timing Role: Unidirectional current path during half-cycle conduction; blocks 200 V reverse voltage during complementary switch conduction. Use Value: 35 ns trr limits reverse recovery charge (Qrr), suppressing voltage overshoot and reducing snubber losses. |
| Freewheeling Diode | Automotive Power Module |
Use Scenario: Inductive load flyback protection in 24 V industrial motor drivers using IGBT half-bridges. IC Role / Device Role / Timing Role: Provides low-impedance return path for stored inductor energy when main switch turns off. Use Value: 125 A IFSM withstands peak inductive kick without degradation; TO-220AC tab ensures direct mechanical/thermal coupling to chassis ground. | Use Scenario: Auxiliary power supply rectification in automotive body control modules (BCM) requiring AEC-Q101 compliance. IC Role / Device Role / Timing Role: Input rectifier converting 12 V battery feed to regulated 5 V/3.3 V rails; operates continuously at 8 A peak load. Use Value: Qualified SFA804GH variant meets automotive temperature cycling, vibration, and long-term reliability requirements per AEC-Q101 Rev D. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar super fast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH8R02DJF | 8 A, 200 V, VF = 0.92 V @ 8 A, trr = 25 ns, TO-220AC | Lower VF and faster trr; higher cost; no AEC-Q101 option | Select when prioritizing lowest conduction + switching loss over qualification or cost |
| VS-8EWH02FN-M3 | 8 A, 200 V, VF = 0.95 V @ 8 A, trr = 30 ns, TO-220AC, AEC-Q101 qualified | Similar performance envelope; Vishay's AEC-Q101 version offers alternate supply chain | Select when dual-sourcing or second-source qualification is required alongside SFA804GH |
Compared with STTH8R02DJF and VS-8EWH02FN-M3, the SFA804G balances competitive VF/trr performance with cost-effective AEC-Q101 availability in the SFA804GH variant-making it suitable for cost-sensitive automotive and industrial designs where 0.975 V VF and 35 ns trr meet system loss budgets.
Availability
SFA804G is available at Aetrix Electronics and suitable for DC-DC converters, switching inverters, freewheeling diode circuits, and automotive auxiliary power modules requiring stable component supply and long-term production continuity.
Supply support for SFA804G 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 power, automotive, and industrial markets since 1979.
The SFA804G belongs to TSC's Super Fast Rectifier family, engineered specifically for high-frequency, high-efficiency AC/DC and DC/DC power conversion where low VF, fast trr, and robust surge capability are essential.
FAQ
What is the maximum repetitive peak reverse voltage (VRRM) rating for the SFA804G?
The SFA804G has a VRRM rating of 200 V, meaning it can reliably block up to 200 V of reverse voltage in repetitive operation without breakdown. This value is fixed for the SFA804G within the SFA801G–SFA808G series and is confirmed in the Absolute Maximum Ratings table of the official datasheet revision K2103.
What is the forward voltage drop (VF) of the SFA804G at its rated current?
The SFA804G exhibits a typical forward voltage drop of 0.975 V at IF = 8 A and TJ = 25°C, as specified in the Electrical Specifications table. This value is measured under pulsed conditions (PW = 0.3 ms) and represents the conduction loss baseline used for thermal and efficiency calculations in power supply design.
Is the SFA804G suitable for automotive applications?
The base SFA804G is not AEC-Q101 qualified, but the pin-identical SFA804GH variant is explicitly qualified per AEC-Q101 Rev D. Engineers requiring automotive-grade reliability must specify SFA804GH; the SFA804G itself is intended for industrial and commercial power applications where qualification is not mandated.
What is the thermal resistance (RθJC) of the SFA804G, and how does it impact heatsink design?
The SFA804G has a junction-to-case thermal resistance (RθJC) of 4°C/W. This means that for every watt of power dissipated internally, the junction temperature rises 4°C above the case temperature. Accurate heatsink selection requires measuring case temperature under load and applying RθJC to determine worst-case junction temperature versus the 150°C maximum limit.
Does the SFA804G have a defined reverse recovery time (trr), and why does it matter?
Yes, the SFA804G has a typical reverse recovery time (trr) of 35 ns, measured at IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A. This parameter directly affects switching loss and EMI generation in high-frequency converters; shorter trr reduces reverse recovery charge (Qrr), minimizing voltage spikes and improving efficiency above 100 kHz.
SFA804G 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):
- 200 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 @ 200 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
SFA804G FAQ
1.How can I place an order for SFA804G through Aetrix?
Please submit a Request for Quotation (RFQ) for SFA804G 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 SFA804G reliable?
The price and inventory of SFA804G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SFA804G is usually 5 days.
3.What payment methods are accepted for SFA804G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SFA804G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SFA804G?
SFA804G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SFA804G 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 SFA804G?
For technical support, including SFA804G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SFA804G requirements.
6.How does Aetrix verify that SFA804G is sourced from the original manufacturer or authorized distributors?
All SFA804G 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 SFA804G meets industry standards.
7.What is the process for return or replacement of SFA804G?
All SFA804G units undergo pre-shipment inspection (PSI). If there is an issue with SFA804G, 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 SFA804G part is unused and in its original packaging.
Return procedure for SFA804G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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