Taiwan Semiconductor Corporation SFT14G A1G

Overview

SFT14G from Taiwan Semiconductor is a 1 A, 200 V repetitive peak reverse voltage super fast rectifier diode in TS-1 package, featuring 35 ns reverse recovery time, 0.95 V forward voltage at 1 A and 25°C, and 20 pF junction capacitance at 1 MHz/4.0 V - deployed in DC-DC converters and freewheeling paths for high-efficiency power conversion.

For engineers reviewing the SFT14G datasheet, SFT14G pinout, SFT14G application, or SFT14G equivalent, key selection criteria include V_RRM = 200 V, I_F = 1 A, t_rr = 35 ns, V_F = 0.95 V, and thermal resistance R_θJA = 100 °C/W - critical for compact switching power supplies requiring low conduction loss and fast recovery.

Technical Context

The SFT14G is a single-die, planar epitaxial super fast recovery rectifier optimized for high-frequency switching applications. Its 35 ns reverse recovery time and low 0.95 V forward voltage enable reduced switching losses and improved efficiency in SMPS topologies operating up to several hundred kHz.

Designed with pure tin-plated leads compliant with J-STD-002 and JESD201 Class 2 whisker testing, the device supports lead-free reflow soldering. The TS-1 package provides UL 94V-0 rated molding compound and cathode polarity marking via band.

Key Specifications

Pinout & Package

TS-1 package: surface-mount, single-anode/single-cathode configuration with cathode indicated by molded band; dimensions per Taiwan Semiconductor Package Outline Drawing (TS-1 Rev. J2104); weight ≈ 0.200 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH1R02U and MUR120, the SFT14G delivers balanced performance: 35 ns t_rr and 0.95 V V_F with matched 100 °C/W thermal resistance and native TS-1 compatibility - making it optimal for space-constrained, high-efficiency 100–300 kHz SMPS designs where footprint and thermal design are fixed.

Availability

SFT14G is available at Aetrix Electronics and suitable for DC-DC converters, switching inverters, and freewheeling diode applications requiring stable component supply, consistent parametric performance, and RoHS-compliant manufacturing.

Supply support for SFT14G 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 for industrial and automotive markets.

The SFT14G belongs to TSC's SFT11G–SFT18G super fast rectifier family, engineered specifically for high-frequency switching power supplies demanding low V_F, fast t_rr, and robust thermal performance in compact surface-mount packages.

FAQ

What is the maximum repetitive peak reverse voltage (V_RRM) of the SFT14G?

The SFT14G has a V_RRM rating of 200 V, as confirmed in the Absolute Maximum Ratings table of the official Taiwan Semiconductor datasheet (Version J2104). This value defines the highest reverse voltage the device can block repeatedly without breakdown and is critical for selecting appropriate voltage margin in flyback or clamp circuits. Operating above 200 V risks irreversible avalanche failure. The SFT14G is part of an 8-part series spanning 50 V to 600 V, with SFT14G specifically assigned to the 200 V grade.

What is the forward voltage (V_F) of the SFT14G at 1 A and 25°C?

The SFT14G exhibits a typical forward voltage of 0.95 V at I_F = 1 A and T_J = 25°C, per the Electrical Specifications table. This value is measured under pulsed conditions (PW = 0.3 ms) to avoid self-heating effects. At elevated junction temperatures (e.g., 125°C), V_F decreases slightly due to semiconductor physics, but system-level thermal design must ensure average dissipation remains within limits. The SFT14G's 0.95 V V_F is lower than many standard fast rectifiers, directly reducing conduction loss in the SFT14G-based power stage.

Does the SFT14G have AEC-Q101 qualification?

The base SFT14G is not AEC-Q101 qualified; however, the variant SFT14GH is explicitly listed as AEC-Q101 qualified in the Ordering Information section of the datasheet. The "H" suffix denotes qualification to the automotive stress test standard, including temperature cycling, high-temperature operating life, and unbiased highly accelerated stress testing. For automotive applications requiring qualification, designers must specify SFT14GH - the SFT14G itself lacks this certification and should be used only in industrial or consumer-grade systems.

What is the reverse recovery time (t_rr) of the SFT14G and how is it tested?

The SFT14G has a maximum reverse recovery time of 35 ns, measured under the condition I_F = 0.5 A, I_R = 1.0 A, and I_rr = 0.25 A, as specified in the Electrical Specifications table. This test uses a standardized double-pulse setup per JEDEC guidelines to quantify minority carrier lifetime and switching speed. The 35 ns t_rr enables reliable operation in switching power supplies up to ~300 kHz without excessive switching loss or voltage overshoot. The SFT14G's t_rr is consistent across its temperature range and is a key differentiator versus standard recovery diodes.

What package does the SFT14G use and what are its key mechanical features?

The SFT14G uses the TS-1 surface-mount package, a compact 2.5 mm × 1.3 mm outline with gull-wing leads. Key mechanical features include UL 94V-0 rated molding compound, pure tin-plated leads compliant with J-STD-002 solderability, and JESD201 Class 2 whisker resistance. Polarity is marked by a cathode band, and the device weighs approximately 0.200 g. The TS-1 footprint is standardized and widely supported in CAD libraries; no alternate packages (e.g., DO-214AC/SMA) are offered for the SFT14G - only TS-1 is listed in the official ordering information.