Taiwan Semiconductor Corporation SF26G

Overview

SF26G from Taiwan Semiconductor is a 2 A, 400 V super fast recovery rectifier diode in DO-204AC (DO-15) package, featuring 35 ns reverse recovery time, 1.30 V forward voltage at 2 A and 25°C, and 50 A surge current capability. It serves as a freewheeling or output rectifier in high-frequency switching power supplies.

For engineers reviewing the SF26G datasheet, SF26G pinout, SF26G application, or SF26G equivalent, key selection criteria include its 400 V repetitive peak reverse voltage, low VF for reduced conduction loss, AEC-Q101 qualification option, thermal resistance of 65°C/W (junction-to-ambient), and suitability for DC-DC converters operating up to several hundred kHz.

Technical Context

The SF26G employs a single-die, glass-passivated silicon junction optimized for fast switching with minimal reverse recovery charge. Its 35 ns trr and 20 pF junction capacitance at 4 V support efficient operation in SMPS topologies where diode switching losses dominate.

Rated for TJ = –55°C to +150°C and qualified per JESD201 Class 2 for tin whisker resistance, the device targets automotive-grade reliability when ordered with "H" suffix. Its DO-204AC package enables through-hole mounting with pure tin-plated leads compliant with J-STD-002 solderability.

Key Specifications

Pinout & Package

DO-204AC (DO-15) axial-leaded package with cathode band marking; leads are pure tin plated, solderable per J-STD-002, and meet UL 94V-0 flammability rating.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH2R04 and ES2D, the SF26G uniquely balances 400 V blocking, DO-204AC compatibility, and 1.30 V VF-making it optimal for space-constrained, mid-voltage industrial and automotive auxiliary supplies where pin-compatible replacement and thermal efficiency are jointly critical.

Availability

SF26G is available at Aetrix Electronics and suitable for DC–DC converters, switching inverters, and automotive power supplies requiring stable component supply, long-lifecycle sourcing, and RoHS-compliant manufacturing.

Supply support for SF26G 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 industrial, computing, and automotive markets since 1979.

The SF26G belongs to TSC's SF2xG super fast rectifier family, designed specifically for high-efficiency, high-frequency switching power conversion where low trr and controlled VF are essential for minimizing total power loss.

FAQ

What is the maximum repetitive peak reverse voltage (VRRM) for SF26G?

The SF26G has a VRRM of 400 V, meaning it can reliably block up to 400 V in reverse bias without breakdown under repetitive conditions. This rating is confirmed in the Absolute Maximum Ratings table of the H2105 datasheet and defines its use in 300–400 V DC bus applications such as telecom power supplies and industrial SMPS. Exceeding this voltage risks avalanche failure.

Is SF26G AEC-Q101 qualified?

The base SF26G is not AEC-Q101 qualified; however, the variant SF26GH is explicitly qualified per AEC-Q101 Rev D for stress tests including temperature cycling, mechanical shock, and humidity bias. The "H" suffix denotes qualification-so SF26G itself requires verification of suffix code on reel label or ordering code before automotive deployment.

What is the forward voltage (VF) of SF26G at rated current?

The SF26G exhibits a typical forward voltage of 1.30 V at 2 A and 25°C, as specified in the Electrical Specifications table. This value increases with junction temperature and current-e.g., ~1.45 V at 125°C-and directly determines conduction loss in the application. Measured under pulse conditions (PW = 0.3 ms), it reflects real-world switching converter operation.

Does SF26G have a defined reverse recovery time (trr)?

Yes, the SF26G has a maximum reverse recovery time of 35 ns, measured at IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A. This parameter is critical for high-frequency designs, as shorter trr reduces switching loss and EMI. The value applies across the SF25G–SF28G group and is verified via standardized test circuit per Figure 6 in the datasheet.

What package type does SF26G use, and are its leads lead-free?

SF26G uses the DO-204AC (DO-15) axial-leaded package with pure tin-plated leads that are fully RoHS-compliant and solderable per J-STD-002. The molding compound meets UL 94V-0, and the device is halogen-free per IEC 61249-2-21. Polarity is marked by a cathode band, and weight is approximately 0.400 g.