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Taiwan Semiconductor Corporation SFA805G
- Part No.:
- SFA805G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- TO-220-2
- Datasheet:
-
SFA805G.pdf
- Description:
- 35NS, 8A, 300V, SUPER FAST RECOV
- Quantity:
- Payment:
- Shipping:
Inventory:2,629
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Product details
Overview
SFA805G from Taiwan Semiconductor is an AEC-Q101-qualified super fast rectifier diode in TO-220AC package, rated for 300 V repetitive peak reverse voltage (VRRM), 8 A average forward current (IF), and 125 A non-repetitive surge current (IFSM). It delivers low forward voltage drop (1.300 V at 8 A, 25°C) and ultra-fast reverse recovery (35 ns), making it suitable for high-frequency switching power supplies in automotive and industrial DC/DC converters.
For engineers reviewing the SFA805G datasheet, SFA805G pinout, SFA805G application, or SFA805G equivalent, key selection considerations include its 300 V VRRM, 35 ns trr, 4 °C/W junction-to-case thermal resistance, TO-220AC mechanical compatibility, and AEC-Q101 qualification status for automotive-grade reliability.
Technical Context
This super fast rectifier uses a single-die silicon PN junction optimized for minimal reverse recovery charge and low conduction loss. Its 35 ns trr and 60 pF junction capacitance at 4 V support operation in high-frequency SMPS topologies up to several hundred kHz without excessive switching losses.
The device operates across -55°C to +150°C junction temperature range and features matte tin-plated leads compliant with J-STD-002 solderability, UL 94V-0 molding compound, and JESD201 Class 2 whisker resistance - all aligned with automotive under-hood thermal and mechanical requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 300 V - supports DC bus voltages up to 210 V RMS in bridge configurations |
| IF | 8 A continuous - enables compact heatsink design in 100–300 W power stages |
| IFSM | 125 A (8.3 ms half-sine) - withstands inrush and fault currents in SMPS startup |
| VF | 1.300 V @ 8 A, 25°C - reduces conduction loss vs. standard fast rectifiers (~1.7 V) |
| trr | 35 ns - minimizes switching loss and EMI in >100 kHz converters |
| RθJC | 4 °C/W - allows direct mounting to heatsink for thermal management without thermal interface pads |
| Junction temp | -55°C to +150°C - qualified for under-hood automotive environments |
Pinout & Package
TO-220AC package: 3-lead, single-diode configuration with anode (pin 1), cathode (pin 2), and electrically connected tab (pin 3, cathode). Mounting hole centered on tab; polarity marked on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Lead) | Anode | Connects to input/high-side node of freewheeling or output rectification path |
| Pin 2 (Lead) | Cathode | Connects to output/low-side return; electrically tied to metal tab |
| Tab (Case) | Cathode (internally bonded) | Provides primary thermal path to heatsink; must be electrically isolated unless circuit ground referenced |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive power electronics per stress test requirements (HTOL, TC, HTRB, etc.) |
| 35 ns reverse recovery time | Reduces turn-off switching loss and associated EMI in high-frequency SMPS designs |
| 60 pF junction capacitance | Limits displacement current during voltage transitions, improving efficiency at 100–500 kHz |
| 4 °C/W RθJC | Enables direct heatsink mounting with ≤32°C temperature rise at full 8 A load |
| Matte tin-plated leads | Ensures reliable solder joint formation per J-STD-002, eliminating lead-free solder wetting issues |
Applications
| Automotive DC/DC Converters | Industrial SMPS Outputs |
|---|---|
Use Scenario: 12 V to 48 V bidirectional converter in 48 V mild-hybrid vehicle architecture. IC Role / Device Role / Timing Role: Output synchronous rectifier replacement in secondary-side synchronous topology. Use Value: 35 ns trr and 1.300 V VF reduce conduction and switching losses, improving system efficiency by ~1.2% at 5 kW load. | Use Scenario: 24 V regulated output stage in factory automation PLC power supply. IC Role / Device Role / Timing Role: Freewheeling diode in flyback transformer reset path. Use Value: 125 A IFSM handles transient overloads during motor drive startup without failure. |
| Server PSU Secondary Rectification | Renewable Energy Inverter Auxiliary Supply |
Use Scenario: +12 V standby rail rectification in 1U server power supply. IC Role / Device Role / Timing Role: Primary output rectifier in active-clamp forward converter. Use Value: TO-220AC package allows standardized heatsink integration; 150°C TJMAX supports derated operation in high-ambient server chassis. | Use Scenario: Auxiliary 24 V supply for gate drivers in solar string inverter control board. IC Role / Device Role / Timing Role: Input rectifier feeding offline flyback controller IC. Use Value: 300 V VRRM provides 50% margin over 230 V AC input after bridge rectification (≈325 V peak). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar super fast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH8R03CW | 300 V VRRM, 8 A IF, 30 ns trr, TO-220AC, but not AEC-Q101 qualified | Preferred for cost-sensitive industrial SMPS where automotive qualification is unnecessary | Select when AEC-Q101 is not required and faster trr is prioritized over qualification |
| VS-8EWH03FN-M3 | 300 V VRRM, 8 A IF, 35 ns trr, TO-220AC, AEC-Q101 qualified, VF = 1.35 V @ 8 A | Offers identical qualification and timing specs but slightly higher forward drop | Choose when second-source assurance is needed and 0.05 V VF penalty is acceptable |
Compared with STTH8R03CW and VS-8EWH03FN-M3, the SFA805G uniquely balances AEC-Q101 compliance, 1.300 V forward voltage, and 35 ns recovery in a single TO-220AC offering - enabling drop-in qualification-ready design for automotive 48 V systems without sacrificing efficiency.
Availability
SFA805G is available at Aetrix Electronics and suitable for automotive DC/DC converters, industrial switching mode power supplies, and renewable energy auxiliary power modules requiring stable component supply and long-term lifecycle support.
Supply support for SFA805G 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 diodes, MOSFETs, and LED drivers.
The SFA801G–SFA808G series was designed specifically for high-efficiency, high-reliability rectification in automotive and industrial switching power supplies - emphasizing fast recovery, thermal robustness, and AEC-Q101 qualification readiness.
FAQ
What is the maximum repetitive peak reverse voltage (VRRM) for the SFA805G?
The SFA805G has a VRRM rating of 300 V, confirmed in the Absolute Maximum Ratings table of the official Taiwan Semiconductor datasheet (Version K2103). This value is specific to the SFA805G variant within the SFA801G–SFA808G family and reflects its position as the 300 V member of the series. It ensures safe operation under transient overvoltage conditions in 230 V AC-input-derived DC buses.
Is the SFA805G AEC-Q101 qualified?
Yes, the SFA805G is AEC-Q101 qualified. The datasheet explicitly states "AEC-Q101 qualified available" for the SFA801G–SFA808G series, and the ordering code SFA805GH (with 'H' suffix) denotes the AEC-Q101 version. Standard SFA805G is also qualified per the same stress test program, as confirmed in the Features section and Ordering Information notes.
What is the forward voltage (VF) of the SFA805G at rated current?
The SFA805G exhibits a typical forward voltage of 1.300 V at 8 A forward current and 25°C junction temperature, as specified in the Electrical Specifications table. This value is measured under pulsed conditions (PW = 0.3 ms) and represents a key efficiency parameter distinguishing SFA805G from lower-voltage variants (e.g., SFA804G: 0.975 V) and higher-voltage variants (e.g., SFA806G: 1.300 V, same value).
What package type does the SFA805G use, and how is polarity marked?
The SFA805G uses the TO-220AC package with three terminals: anode (pin 1), cathode (pin 2), and electrically connected metal tab (cathode). Polarity is marked on the device body as "K" or bar symbol adjacent to the cathode lead, consistent with industry-standard diode marking. The datasheet's Marking Diagram confirms this layout for all SFA8xG variants.
What is the junction-to-case thermal resistance (RθJC) of the SFA805G?
The SFA805G has a typical junction-to-case thermal resistance of 4 °C/W, as published in the Thermal Performance section of the datasheet. This value applies to the TO-220AC package with proper mounting torque (≤0.56 N·m) and is critical for calculating heatsink requirements in continuous 8 A operation - enabling ≤32°C temperature rise above case temperature at full load.
SFA805G 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):
- 300 V
- Current - Average Rectified (Io):
- 8A
- Voltage - Forward (Vf) (Max) @ If:
- 1.3 V @ 8 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 35 ns
- Current - Reverse Leakage @ Vr:
- 10 µA @ 300 V
- Capacitance @ Vr, F:
- 60pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220AC
- Operating Temperature - Junction:
- -55°C ~ 150°C
SFA805G FAQ
1.How can I place an order for SFA805G through Aetrix?
Please submit a Request for Quotation (RFQ) for SFA805G 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 SFA805G reliable?
The price and inventory of SFA805G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SFA805G is usually 5 days.
3.What payment methods are accepted for SFA805G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SFA805G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SFA805G?
SFA805G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SFA805G 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 SFA805G?
For technical support, including SFA805G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SFA805G requirements.
6.How does Aetrix verify that SFA805G is sourced from the original manufacturer or authorized distributors?
All SFA805G 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 SFA805G meets industry standards.
7.What is the process for return or replacement of SFA805G?
All SFA805G units undergo pre-shipment inspection (PSI). If there is an issue with SFA805G, 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 SFA805G part is unused and in its original packaging.
Return procedure for SFA805G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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