Taiwan Semiconductor Corporation SFAS1008G

Overview

SFAS1008G from Taiwan Semiconductor is a 10 A, 600 V super fast recovery surface-mount rectifier in TO-263AB (D2PAK) package, featuring 35 ns reverse recovery time, 1.7 V max forward voltage at 10 A, and 125 A surge capability-designed for high-frequency switching mode power supplies and freewheeling paths in DC-DC converters.

For engineers reviewing the SFAS1008G datasheet, SFAS1008G pinout, SFAS1008G application, or SFAS1008G equivalent, key selection criteria include its 600 V repetitive peak reverse voltage, low 2.2 °C/W junction-to-case thermal resistance, RoHS- and halogen-free compliance, and suitability for automated SMT assembly with moisture sensitivity level 1.

Technical Context

The SFAS1008G employs a single-die, glass-passivated PN junction optimized for fast switching in hard-commutated topologies. Its 35 ns trr and 60 pF junction capacitance enable efficient operation above 100 kHz, while the 125 A non-repetitive surge rating supports transient load conditions in SMPS primary-side rectification.

Thermally, the device delivers 2.2 °C/W R_θJC via its TO-263AB copper-tab package, enabling direct heatsinking without isolation pads. The 1.7 V VF maximum at 10 A and 25 °C ensures low conduction loss, and its -55 °C to +150 °C operating junction range supports industrial and automotive under-hood environments.

Key Specifications

Pinout & Package

Package: TO-263AB (D2PAK), surface-mount with exposed copper drain tab (cathode-connected) for thermal and electrical performance. Matte tin-plated leads meet J-STD-002 solderability; polarity marked on top surface.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar super fast rectifier applications.

Compared with STTH10R06DJF and IXYS MUR1060CT, the SFAS1008G uniquely balances low V_F (1.7 V), fast t_rr (35 ns), and D2PAK thermal performance-making it optimal for compact, high-efficiency SMT-based power supplies where both conduction and switching losses must be minimized.

Availability

SFAS1008G is available at Aetrix Electronics and suitable for DC-DC converters, switching mode inverters, and freewheeling applications requiring stable component supply, high-volume tape-and-reel delivery (800/reel), and consistent parametric performance across production lots.

Supply support for SFAS1008G 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 power discrete manufacturer headquartered in Hsinchu, Taiwan, serving global industrial, computing, and consumer markets since 1979.

The SFAS1008G belongs to TSC's Super Fast Rectifier family, engineered specifically for high-frequency switching power conversion-emphasizing low V_F, fast t_rr, and robust thermal design in surface-mount packages.

FAQ

What is the maximum junction temperature rating for the SFAS1008G?

The SFAS1008G has a maximum junction temperature (T_J) of +150 °C, with a specified operating range from -55 °C to +150 °C. This rating allows reliable operation in demanding industrial environments. Thermal design must ensure that actual junction temperature stays within this limit under worst-case power dissipation, using the device's 2.2 °C/W R_θJC and appropriate PCB copper area. The SFAS1008G datasheet provides derating curves to guide safe current limits at elevated case temperatures.

Is the SFAS1008G suitable for automated SMT assembly?

Yes, the SFAS1008G is explicitly designed for automated placement and reflow soldering. It carries moisture sensitivity level 1 per J-STD-020, eliminating pre-bake requirements. Its TO-263AB (D2PAK) package features matte tin-plated leads compliant with J-STD-002, and the marking code "SFAS1008G" is laser-etched for machine vision recognition. The SFAS1008G is supplied in 800-unit tape-and-reel format optimized for pick-and-place equipment.

What is the reverse recovery time (t_rr) specification for the SFAS1008G?

The SFAS1008G has a maximum reverse recovery time (t_rr) of 35 ns, measured under IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A conditions. This value is confirmed in the official datasheet's Electrical Specifications table. The fast t_rr directly contributes to reduced switching losses and lower EMI generation in high-frequency power converters. Designers should reference the SFAS1008G test circuit diagram (Fig.6) for accurate measurement setup.

Does the SFAS1008G have halogen-free and RoHS compliance documentation?

Yes, the SFAS1008G is certified RoHS compliant and halogen-free per IEC 61249-2-21. These declarations are stated in the official product brief and supported by TSC's material declarations. The device uses molding compound free of brominated flame retardants and antimony trioxide. Compliance applies to the full SFAS1008G unit-including die, leadframe, and encapsulant-and is verified through standardized analytical testing. Documentation is available upon request from Aetrix Electronics for the SFAS1008G.

How does the thermal performance of the SFAS1008G compare to standard TO-220 rectifiers?

The SFAS1008G achieves a junction-to-case thermal resistance (R_θJC) of 2.2 °C/W in its TO-263AB package-significantly lower than typical TO-220 rectifiers (often >3.5 °C/W)-due to its large copper tab and optimized internal construction. This enables higher power density and better thermal coupling to PCB copper pours. Unlike TO-220, the SFAS1008G's surface-mount form avoids mechanical stress and simplifies automated assembly. For equivalent current ratings, the SFAS1008G delivers superior thermal headroom in space-constrained layouts.