Taiwan Semiconductor Corporation SF16G-K

Overview

SF16G-K from Taiwan Semiconductor is a 1 A, 400 V repetitive peak reverse voltage super fast rectifier diode in DO-204AL (DO-41) package, featuring 35 ns reverse recovery time, 1.30 V forward voltage at 1 A and 25°C, and 20 °C/W junction-to-lead thermal resistance. It serves as a freewheeling or output rectifier in high-frequency switching power supplies.

For engineers reviewing the SF16G-K datasheet, SF16G-K pinout, SF16G-K application, or SF16G-K equivalent, key selection criteria include its 400 V VRRM rating, low trr for reduced switching loss, VF consistency across temperature, DO-41 mechanical compatibility, and RoHS/halogen-free compliance for industrial power conversion designs.

Technical Context

The SF16G-K is a single-die, planar passivated silicon PN junction rectifier optimized for high-speed switching operation. Its 35 ns reverse recovery time and 10 pF junction capacitance at 1 MHz / 4.0 V enable efficient performance in DC–DC converters operating above 50 kHz.

Thermally, it supports continuous 1 A forward current with derating above 75°C ambient, leveraging a 20 °C/W R_θJL to maintain junction temperature ≤150°C under typical PCB copper pad conditions. The cathode band polarity marking and pure tin-plated leads ensure reliable solderability per J-STD-002.

Key Specifications

Pinout & Package

Package: DO-204AL (DO-41), axial leaded, epoxy-molded case meeting UL 94V-0; 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 STTH1R04 and ES1D, the SF16G-K offers balanced speed-efficiency trade-off in through-hole DO-41 format, making it optimal for cost-sensitive, thermally managed industrial power supplies requiring 400 V blocking and proven long-term reliability.

Availability

SF16G-K is available at Aetrix Electronics and suitable for DC–DC converters, switching mode power supplies, and freewheeling applications requiring stable component supply, consistent parametric performance, and long-lifecycle availability.

Supply support for SF16G-K 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 semiconductor manufacturer specializing in discrete power devices, including rectifiers, TVS diodes, and MOSFETs, with global distribution and AEC-Q200 qualified products.

The SF11G-K to SF18G-K series was designed specifically for high-efficiency, high-reliability AC/DC and DC/DC power conversion in industrial, computing, and consumer power supplies.

FAQ

What is the maximum repetitive peak reverse voltage (VRRM) for SF16G-K?

The SF16G-K has a VRRM rating of 400 V, meaning it reliably blocks up to 400 V of reverse voltage in repetitive operation. This value is confirmed in the Absolute Maximum Ratings table of the official TSC datasheet Version B2104 and defines the upper limit for safe reverse-bias operation in circuits like flyback transformer outputs or freewheeling paths. Exceeding 400 V may cause avalanche breakdown or permanent damage to the SF16G-K.

What is the forward voltage drop (VF) of SF16G-K at rated current?

The SF16G-K exhibits a typical forward voltage drop of 1.30 V at 1 A forward current and 25°C junction temperature, as specified in the Electrical Specifications table. This VF value is measured under pulsed conditions (PW = 0.3 ms) and directly impacts conduction loss-lower VF improves efficiency and reduces thermal stress. At elevated temperatures (e.g., 125°C), VF decreases slightly, but system design should verify thermal margin using the SF16G-K's derating curve.

Does SF16G-K have a defined reverse recovery time (trr), and how is it measured?

Yes, the SF16G-K has a maximum reverse recovery time (trr) of 35 ns, measured under standardized conditions: IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A. This parameter is critical for high-frequency switching applications, as shorter trr reduces switching losses and EMI generation. The test method and waveform definitions are detailed in the Characteristics Curves section (Fig.6) of the SF16G-K datasheet, ensuring repeatable validation across manufacturing lots.

Is SF16G-K compliant with environmental regulations such as RoHS and halogen-free standards?

Yes, the SF16G-K is RoHS compliant and halogen-free per IEC 61249-2-21. These certifications are explicitly stated in the FEATURES section of the TSC datasheet and verified via material declarations. The device uses pure tin-plated leads and UL 94V-0 molding compound, supporting environmentally conscious manufacturing and end-of-life processing without brominated flame retardants or restricted heavy metals-key for industrial and consumer product certifications.

What is the thermal resistance from junction to lead (RθJL) for SF16G-K, and why does it matter?

The SF16G-K has a typical junction-to-lead thermal resistance (R_θJL) of 20 °C/W, enabling accurate thermal modeling when soldered to PCB copper pads. This parameter matters because it directly links power dissipation (I²R + VF×IF) to junction temperature rise-critical for ensuring TJ stays below 150°C under continuous 1 A load. Designers use R_θJL alongside board layout data to avoid derating or forced cooling, preserving reliability of the SF16G-K in sealed or high-ambient environments.