Taiwan Semiconductor Corporation SF22G B0G

Overview

SF22G from Taiwan Semiconductor is a 2 A, 100 V super fast rectifier diode in DO-204AC (DO-15) package, featuring 35 ns reverse recovery time, 0.95 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 SF22G datasheet, SF22G pinout, SF22G application, or SF22G equivalent, key selection criteria include repetitive peak reverse voltage (100 V), forward voltage drop, thermal resistance (65 °C/W junction-to-ambient), and AEC-Q101 qualification status for automotive-grade reliability validation.

Technical Context

The SF22G employs a glass-passivated single-die PN junction optimized for high-speed switching, with low stored charge enabling fast reverse recovery (trr ≤ 35 ns). Its 100 V VRRM rating and 0.95 V VF at 2 A support efficient operation in 100 kHz–500 kHz DC/DC converters.

Thermal performance is defined by RθJA = 65 °C/W and RθJC = 16 °C/W, allowing sustained 2 A conduction at ambient temperatures up to 75°C without derating when mounted on standard PCB copper area. The device meets JESD201 Class 2 whisker resistance and RoHS/halogen-free compliance per IEC 61249-2-21.

Key Specifications

Pinout & Package

Package: DO-204AC (DO-15), axial lead, glass-passivated single die, cathode indicated by band.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH2R0100S and ES2D, the SF22G provides the best balance of low VF (0.95 V), fast trr (35 ns), and AEC-Q101 availability in the DO-15 footprint-making it optimal for space-constrained automotive and industrial SMPS where reliability and thermal performance are jointly critical.

Availability

SF22G is available at Aetrix Electronics and suitable for DC/DC converters, switching inverters, and automotive power supplies requiring stable component supply with consistent parametric performance across production lots.

Supply support for SF22G 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 SF21G–SF28G series was designed specifically for high-efficiency, high-reliability switching power conversion in automotive, industrial, and consumer applications-emphasizing fast recovery, low VF, and rigorous qualification testing.

FAQ

What is the maximum repetitive peak reverse voltage (VRRM) for SF22G?

The SF22G has a VRRM rating of 100 V, meaning it can reliably block up to 100 V of reverse voltage in repetitive operation without breakdown. This value is confirmed in the Absolute Maximum Ratings table of the official TSC datasheet (Version H2105), and applies across the full operating temperature range of −55°C to +150°C. Exceeding this voltage risks irreversible avalanche failure in the SF22G.

Does SF22G have AEC-Q101 qualification?

The base SF22G part is not AEC-Q101 qualified; however, the AEC-Q101 variant is designated SF22G H and is explicitly listed in the Ordering Information section of the TSC datasheet. SF22G H undergoes full stress testing per AEC-Q101 Rev D, including HTGB, TC, and UHAST, and carries the "H" suffix in both marking and ordering code. Standard SF22G remains suitable for industrial use.

What is the forward voltage (VF) of SF22G at 2 A and 25°C?

The SF22G exhibits a typical forward voltage of 0.95 V at 2 A and 25°C, as specified in the Electrical Specifications table under "Forward voltage(1)" for SF22G. This value is measured using a 0.3 ms pulse width test condition and directly impacts conduction loss in power supply designs-lower VF translates to reduced I²R heating and improved system efficiency.

What package type does SF22G use, and what are its key mechanical features?

SF22G uses the DO-204AC (DO-15) axial-leaded package with glass-passivated chip junction, pure tin-plated leads compliant with J-STD-002, and UL 94V-0 rated molding compound. Its cathode is marked by a visible band, and the device weighs approximately 0.400 g. These features ensure solderability, flammability safety, and mechanical robustness in automated assembly and harsh environments.

How does SF22G compare to SF21G and SF23G in terms of voltage rating and forward voltage?

SF22G is rated for 100 V VRRM, positioned between SF21G (50 V) and SF23G (150 V). Its forward voltage is 0.95 V at 2 A and 25°C-identical to SF21G and SF23G per the datasheet's VF grouping (SF21G–SF24G share same VF spec). All three share identical trr (≤35 ns), IFSM (50 A), and thermal specs, making them drop-in replacements except for VRRM-critical designs.