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Home > Products > Discrete Semiconductor Products > Diodes > Rectifiers > Single Diodes

Taiwan Semiconductor Corporation SFAS802G

Name: SFAS802G
Brand: Taiwan Semiconductor Corporation
SKU: SFAS802G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SFAS802G

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: TO-263-3, D2PAK (2 Leads + Tab), TO-263AB

Datasheet:: SFAS802G.pdf

Description:: 35NS, 8A, 100V, SUPER FAST RECOV

Quantity:: RFQ Add To RFQ list

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Inventory:3,227

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Product details

Overview

SFAS802G from Taiwan Semiconductor is an 8A, 100V 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 inverters for high-efficiency power conversion.

For engineers reviewing the SFAS802G datasheet, SFAS802G pinout, SFAS802G application, or SFAS802G equivalent, key selection criteria include V_RRM=100V, I_F=8A, t_rr=35ns, R_θJC=2.2°C/W, and TO-263AB thermal performance in high-frequency switching topologies.

Technical Context

This single-die silicon rectifier uses glass passivated junction technology to achieve fast recovery (t_rr ≤ 35ns) and low conduction loss (V_F = 0.95V @ 8A, 25°C), enabling efficient operation in hard-switched SMPS and freewheeling paths where di/dt stress and reverse recovery energy must be minimized.

Rated for 100V repetitive peak reverse voltage (V_RRM) and 125A non-repetitive surge (8.3ms half-sine), it operates across –55°C to +150°C junction temperature range with 2.2°C/W junction-to-case thermal resistance - optimized for PCB copper heatsinking in D2PAK footprint.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	100 V - maximum blocking voltage in reverse bias without breakdown
I_F	8 A - continuous average forward current rating at case temperature ≤ 110°C
t_rr	35 ns - reverse recovery time under IF = 0.5A, IR = 1.0A, Irr = 0.25A test conditions
V_F	0.95 V @ 8A, 25°C - forward voltage drop defining conduction loss and thermal load
R_θJC	2.2 °C/W - thermal resistance from junction to case, critical for heatsink sizing
C_J	80 pF @ 1MHz, 4V - junction capacitance affecting high-frequency switching noise and EMI
I_FSM	125 A - peak non-repetitive surge current handling capability during startup or fault

Pinout & Package

TO-263AB (D2PAK) package with three terminals: Anode (pin 1), Cathode (pin 2), and exposed metal tab (pin 3, electrically connected to cathode and used for thermal dissipation).

Pin/Terminal	Circuit Role	Design Meaning
Anode (lead 1)	Forward current entry point	Connected to input/high-side node in buck/flyback freewheeling path
Cathode (lead 2)	Forward current exit point	Connected to output/low-side return; ties to exposed tab for thermal + electrical sink
Exposed tab (pin 3)	Cathode extension & thermal interface	Must be soldered to large copper pour for effective heat transfer; electrically identical to pin 2

Key Features

Feature	Design Value
Glass passivated junction	Enables stable leakage performance (I_R ≤ 10 µA @ 25°C) and long-term reliability under humidity exposure
Super fast recovery (t_rr ≤ 35 ns)	Reduces switching losses and EMI in 100–500 kHz SMPS designs compared to standard rectifiers
Low V_F (0.95 V @ 8A)	Lowers conduction loss by ~15% vs. comparable 100V Schottky alternatives above 85°C junction temp
Moisture sensitivity level 1	Eliminates bake requirement before reflow; compatible with standard SMT assembly lines
Halogen-free & RoHS compliant	Meets IEC 61249-2-21 and EU Directive 2011/65/EU for environmentally constrained applications

Applications

Buck Converter Freewheeling Diode	AC-DC PFC Output Rectifier
Use Scenario: High-frequency synchronous buck converter operating at 300 kHz with 12V input, 5V/6A output. IC Role / Device Role / Timing Role: Freewheeling path for inductor current during low-side switch off-time; handles bidirectional dI/dt stress. Use Value: 35ns t_rr minimizes reverse recovery charge (Q_rr), reducing cross-conduction loss and MOSFET voltage overshoot.	Use Scenario: Boost-type active PFC stage in 200W server PSU, rectifying 400V DC bus after boost diode. IC Role / Device Role / Timing Role: Output rectifier conducting continuous 8A average current with 100V blocking requirement. Use Value: 0.95V V_F at 8A lowers conduction loss versus 1.1V alternatives, improving full-load efficiency by ~0.4%.
Inverter Bridge Anti-Parallel Diode	Industrial Motor Drive Snubber Path
Use Scenario: 3-phase IGBT inverter driving 750W BLDC motor, requiring anti-parallel diodes for regenerative current. IC Role / Device Role / Timing Role: Bidirectional conduction path during PWM dead-time and regeneration; subjected to rapid polarity reversal. Use Value: 125A I_FSM withstands motor stall surges; 2.2°C/W R_θJC enables direct tab mounting to heatsink without thermal interface pad.	Use Scenario: Snubber network in 48V industrial PLC output module switching inductive loads up to 2A. IC Role / Device Role / Timing Role: Clamp diode absorbing inductive kickback energy during MOSFET turn-off. Use Value: Fast t_rr and low C_J (80 pF) limit voltage ringing amplitude and reduce snubber capacitor size.

Buck Converter Freewheeling Diode

AC-DC PFC Output Rectifier

Use Scenario: High-frequency synchronous buck converter operating at 300 kHz with 12V input, 5V/6A output.

IC Role / Device Role / Timing Role: Freewheeling path for inductor current during low-side switch off-time; handles bidirectional dI/dt stress.

Use Value: 35ns t_rr minimizes reverse recovery charge (Q_rr), reducing cross-conduction loss and MOSFET voltage overshoot.

Use Scenario: Boost-type active PFC stage in 200W server PSU, rectifying 400V DC bus after boost diode.

IC Role / Device Role / Timing Role: Output rectifier conducting continuous 8A average current with 100V blocking requirement.

Use Value: 0.95V V_F at 8A lowers conduction loss versus 1.1V alternatives, improving full-load efficiency by ~0.4%.

Inverter Bridge Anti-Parallel Diode

Industrial Motor Drive Snubber Path

Use Scenario: 3-phase IGBT inverter driving 750W BLDC motor, requiring anti-parallel diodes for regenerative current.

IC Role / Device Role / Timing Role: Bidirectional conduction path during PWM dead-time and regeneration; subjected to rapid polarity reversal.

Use Value: 125A I_FSM withstands motor stall surges; 2.2°C/W R_θJC enables direct tab mounting to heatsink without thermal interface pad.

Use Scenario: Snubber network in 48V industrial PLC output module switching inductive loads up to 2A.

IC Role / Device Role / Timing Role: Clamp diode absorbing inductive kickback energy during MOSFET turn-off.

Use Value: Fast t_rr and low C_J (80 pF) limit voltage ringing amplitude and reduce snubber capacitor size.

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)	V_RRM=600V, V_F=1.7V @ 8A, t_rr=35ns, TO-263AB	Higher voltage rating but higher V_F; less efficient at 100V-class systems	Select when system requires >100V margin or transient overvoltage protection beyond 100V
VS-8EWH06FN-M3 (Vishay)	V_RRM=600V, V_F=1.75V @ 8A, t_rr=30ns, TO-263AB	Marginally faster t_rr but significantly higher conduction loss; same footprint	Prefer only if reverse recovery speed dominates over thermal design constraints

Compared with STTH8L06D and VS-8EWH06FN-M3, SFAS802G delivers optimal balance of low V_F (0.95V), 100V rating, and 35ns t_rr - making it more thermally efficient than 600V alternatives in 12–48V DC-DC and PFC output stages where voltage derating is unnecessary.

Availability

SFAS802G is available at Aetrix Electronics and suitable for DC-DC converters, switching mode inverters, and freewheeling applications requiring stable component supply, consistent parametric performance, and long-term industrial availability.

Supply support for SFAS802G 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, and MOSFETs since 1979.

The SFAS80xG series targets high-efficiency power conversion systems, emphasizing low V_F, fast t_rr, and robust surge capability in surface-mount packages for automated manufacturing.

FAQ

What is the maximum junction temperature rating for SFAS802G?

The SFAS802G has a maximum junction temperature (T_J) of +150°C and a minimum of –55°C, allowing operation in demanding industrial environments. This rating is supported by its glass passivated junction and TO-263AB package thermal design. Derating curves in the SFAS802G datasheet define safe operating area limits based on case temperature and ambient conditions.

Is SFAS802G suitable for use in synchronous rectification circuits?

No - SFAS802G is a unidirectional super fast recovery rectifier, not a synchronous MOSFET. It cannot be actively controlled like a gate-driven device. However, SFAS802G is commonly used as the freewheeling diode in synchronous buck converters where the high-side MOSFET is actively switched and the low-side path relies on passive conduction through SFAS802G during dead time.

What is the reverse leakage current specification for SFAS802G at elevated temperature?

At T_J = 100°C and rated reverse voltage (100V), the SFAS802G exhibits a maximum reverse leakage current (I_R) of 400 µA, per its electrical specifications table. At 25°C, I_R is limited to 10 µA. This low leakage supports stable operation in high-temperature power supplies and motor drives.

Does SFAS802G have a halogen-free and RoHS-compliant construction?

Yes - SFAS802G meets RoHS Directive 2011/65/EU and is halogen-free per IEC 61249-2-21. The molding compound contains no brominated flame retardants or chlorine-based additives, and the matte tin-plated leads comply with J-STD-002 solderability standards.

How does the thermal resistance of SFAS802G compare to standard TO-220 rectifiers?

SFAS802G has a junction-to-case thermal resistance (R_θJC) of 2.2°C/W, significantly lower than typical TO-220 rectifiers (~3.5–5.0°C/W). This advantage stems from the TO-263AB (D2PAK) package's larger copper tab area and optimized internal bond structure, enabling higher power density and reduced heatsink requirements in space-constrained layouts.

SFAS802G 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):: 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:: 80pF @ 4V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: TO-263AB (D2PAK)

Operating Temperature - Junction:: -55°C ~ 150°C

SFAS802G FAQ

1.How can I place an order for SFAS802G through Aetrix?

Please submit a Request for Quotation (RFQ) for SFAS802G 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 SFAS802G reliable?

The price and inventory of SFAS802G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SFAS802G is usually 5 days.

3.What payment methods are accepted for SFAS802G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SFAS802G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SFAS802G?

SFAS802G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SFAS802G 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 SFAS802G?

For technical support, including SFAS802G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SFAS802G requirements.

6.How does Aetrix verify that SFAS802G is sourced from the original manufacturer or authorized distributors?

All SFAS802G 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 SFAS802G meets industry standards.

7.What is the process for return or replacement of SFAS802G?

All SFAS802G units undergo pre-shipment inspection (PSI). If there is an issue with SFAS802G, 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 SFAS802G part is unused and in its original packaging.

Return procedure for SFAS802G:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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