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Taiwan Semiconductor Corporation SFAS801G
- Part No.:
- SFAS801G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Datasheet:
-
SFAS801G.pdf
- Description:
- 35NS, 8A, 50V, SUPER FAST RECOVE
- Quantity:
- Payment:
- Shipping:
Inventory:5,198
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Product details
Overview
SFAS801G from Taiwan Semiconductor is an 8A, 50V repetitive peak reverse voltage super fast surface-mount rectifier in TO-263AB (D2PAK) package, featuring 0.95V forward voltage at 8A/25°C, 35ns reverse recovery time, and 125A surge capability - deployed in DC-DC converters and switching-mode inverters.
For engineers reviewing the SFAS801G datasheet, SFAS801G pinout, SFAS801G application, or SFAS801G equivalent, key selection criteria include VRRM=50V, IF=8A, trr=35ns, RθJC=2.2°C/W, and TO-263AB thermal performance for high-efficiency power conversion designs.
Technical Context
This single-die, glass-passivated super fast rectifier delivers low conduction loss and rapid switching via optimized PN junction design. Its 35ns reverse recovery time and 0.95V forward voltage at rated current support high-frequency operation in hard-switched topologies.
The device operates across -55°C to +150°C junction temperature range with 2.2°C/W junction-to-case thermal resistance, enabling reliable thermal management in compact D2PAK-mounted power stages without forced cooling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 50 V - Maximum non-repetitive reverse blocking voltage; defines minimum input/output isolation margin in 24–48V DC-DC systems |
| IF | 8 A - Continuous average forward current; supports sustained output power up to ~384W at 48V with appropriate heatsinking |
| trr | 35 ns - Measured at IF=0.5A, IR=1.0A, Irr=0.25A; enables stable operation up to ~3 MHz switching frequency |
| VF | 0.95 V @ 8A, 25°C - Directly determines conduction loss (7.6W at full load), critical for efficiency optimization |
| RθJC | 2.2 °C/W - Enables calculation of junction temperature rise above case; allows thermal design with <10°C rise at 8A with minimal heatsink |
| CJ | 80 pF @ 1MHz, 4V - Limits capacitive turn-on loss and EMI generation in high-dv/dt applications |
Pinout & Package
TO-263AB (D2PAK) package with three terminals: Anode (pin 1), Cathode (pin 2), and exposed thermal pad (pin 3, electrically connected to cathode). Matte tin-plated leads comply with J-STD-002 solderability standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input current entry point | Connected to high-side switch node or transformer secondary; must withstand full reverse voltage during off-state |
| Cathode | Output current exit point | Common return path for load current; tied to PCB thermal pad for heat dissipation |
| Thermal Pad (exposed) | Thermal and electrical connection to cathode | Requires ≥20 mm² copper pour with ≥4 thermal vias for effective junction-to-board heat transfer |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated chip junction | Prevents moisture-induced degradation and ensures long-term reliability under humid operating conditions per J-STD-020 Level 1 |
| Super fast recovery (35ns) | Reduces switching losses and ringing in high-frequency SMPS, enabling >500 kHz operation without snubber circuits |
| Low forward voltage (0.95V) | Lowers conduction loss by ~15% vs. standard fast rectifiers, improving system efficiency in 12–48V output rails |
| High surge rating (125A) | Withstands inrush and transient overloads typical in industrial motor drives and UPS systems without failure |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for environmentally constrained end equipment |
Applications
| DC-DC Converter | Switching Inverter |
|---|---|
Use Scenario: Secondary-side rectification in isolated 48V-to-12V buck-derived converters for telecom and server power supplies. IC Role / Device Role / Timing Role: Output rectifier handling continuous 8A DC current with minimal voltage drop and thermal rise. Use Value: 0.95V VF reduces conduction loss by 1.2W vs. competing 1.1V devices, directly improving full-load efficiency by 0.8–1.1%. | Use Scenario: Freewheeling path in 3-phase IGBT-based motor inverters for HVAC and industrial drives. IC Role / Device Role / Timing Role: Clamp diode providing low-loss current recirculation during IGBT turn-off transitions. Use Value: 35ns trr minimizes reverse recovery charge (Qrr ≈ 17.5nC), reducing switching loss and EMI in 10–20 kHz PWM operation. |
| Freewheeling Diode | SMPS Output Stage |
Use Scenario: Inductive load flyback protection in solenoid drivers and relay interface modules. IC Role / Device Role / Timing Role: Fast-decay path for stored inductor energy, preventing voltage spikes exceeding 50V rating. Use Value: 125A IFSM safely absorbs 10× nominal current surges during abrupt load disconnection events. | Use Scenario: Synchronous rectification assist in high-density AC-DC adapters targeting USB PD 3.1 (28V/5A). IC Role / Device Role / Timing Role: Standby-mode freewheeling element maintaining regulation during light-load discontinuous conduction mode. Use Value: 10µA max reverse leakage at 25°C ensures negligible standby power drain in always-on auxiliary supplies. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar super fast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Vishay VS-8EWH05FN-M3 | VRRM=50V, IF=8A, trr=30ns, VF=0.89V @ 8A - slightly lower VF and faster trr, but TO-252 package limits thermal performance | Lower RθJC (3.5°C/W) reduces power density capability in space-constrained layouts | Preferred where board-level thermal mass is limited and 30ns trr is critical for EMI control |
| ON Semiconductor MUR850EG | VRRM=50V, IF=8A, trr=35ns, VF=0.97V @ 8A - nearly identical timing and voltage specs, but TO-220AC package requires through-hole assembly | Higher RθJC (3.0°C/W) and larger footprint reduce suitability for high-density SMT designs | Selected when legacy through-hole compatibility or higher mechanical robustness is required |
Compared with VS-8EWH05FN-M3 and MUR850EG, the SFAS801G offers superior thermal performance (RθJC=2.2°C/W) in a surface-mount D2PAK package, enabling higher power density in automated SMT production while maintaining matching 35ns recovery and 50V rating.
Availability
SFAS801G is available at Aetrix Electronics and suitable for DC-DC converters, switching inverters, and freewheeling applications requiring stable component supply, consistent parametric performance, and RoHS-compliant manufacturing.
Supply support for SFAS801G 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 Company (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in power rectifiers, TVS diodes, and MOSFETs since 1979.
The SFAS801G belongs to TSC's Super Fast Rectifier product line, engineered specifically for high-frequency, high-efficiency power conversion in industrial, telecom, and computing power supplies where low VF, fast trr, and robust surge capability are essential.
FAQ
What is the maximum junction temperature rating for SFAS801G?
The SFAS801G has a maximum junction temperature (TJ) of +150°C, with operational range from -55°C to +150°C. This rating allows reliable use in enclosed industrial enclosures or near heat-generating components when thermal design maintains junction temperature below this limit. The SFAS801G's 2.2°C/W RθJC enables accurate thermal modeling using measured case temperature.
Does SFAS801G support automated pick-and-place assembly?
Yes, the SFAS801G is explicitly designed for automated placement, as confirmed by its TO-263AB (D2PAK) package, matte tin-plated leads compliant with J-STD-002, and moisture sensitivity level 1 per J-STD-020. These features ensure compatibility with standard SMT reflow profiles and high-yield placement on production lines without special handling.
What is the reverse leakage current specification for SFAS801G at elevated temperature?
The SFAS801G exhibits ≤400 µA reverse leakage current (IR) at 100°C and rated reverse voltage, per its electrical specifications table. At 25°C, leakage is ≤10 µA. This behavior is critical for low-power standby modes where reverse conduction must remain negligible across ambient temperature variations.
Is SFAS801G halogen-free and RoHS compliant?
Yes, the SFAS801G is both RoHS compliant and halogen-free according to IEC 61249-2-21. The molding compound contains no brominated flame retardants or chlorine-based additives, and all lead finishes meet EU RoHS Directive 2011/65/EU requirements - verified in the official TSC documentation for version N2103.
How does the 35ns reverse recovery time of SFAS801G impact EMI in switching applications?
The 35ns reverse recovery time (trr) of SFAS801G directly limits high-frequency ringing and dv/dt-induced noise during turn-off transitions. Shorter trr reduces reverse recovery charge (Qrr), lowering electromagnetic interference in 100–500 kHz SMPS designs - especially beneficial in automotive and medical-grade power supplies where conducted EMI must meet CISPR 25 Class 5 limits.
SFAS801G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Packaging:
- Tape & Reel (TR)
- 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:
- 80pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-263AB (D2PAK)
- Operating Temperature - Junction:
- -55°C ~ 150°C
SFAS801G FAQ
1.How can I place an order for SFAS801G through Aetrix?
Please submit a Request for Quotation (RFQ) for SFAS801G 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 SFAS801G reliable?
The price and inventory of SFAS801G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SFAS801G is usually 5 days.
3.What payment methods are accepted for SFAS801G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SFAS801G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SFAS801G?
SFAS801G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SFAS801G 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 SFAS801G?
For technical support, including SFAS801G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SFAS801G requirements.
6.How does Aetrix verify that SFAS801G is sourced from the original manufacturer or authorized distributors?
All SFAS801G 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 SFAS801G meets industry standards.
7.What is the process for return or replacement of SFAS801G?
All SFAS801G units undergo pre-shipment inspection (PSI). If there is an issue with SFAS801G, 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 SFAS801G part is unused and in its original packaging.
Return procedure for SFAS801G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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