Taiwan Semiconductor Corporation F1T4G A1G

Overview

F1T4G from Taiwan Semiconductor is a 1A, 400V fast recovery rectifier diode in TS-1 package, featuring 150 ns reverse recovery time, 1.3 V max forward voltage at 1 A, and 30 A surge capability - used in DC-DC converters and switching inverters for high-efficiency power conversion.

For engineers reviewing the F1T4G datasheet, F1T4G pinout, F1T4G application, or F1T4G equivalent, key selection criteria include V_RRM = 400 V, I_F = 1 A, t_rr = 150 ns, thermal resistance R_θJA = 90 °C/W, and TS-1 package compatibility with automated SMT assembly.

Technical Context

The F1T4G employs a glass-passivated single-die PN junction optimized for fast recovery (t_rr ≤ 150 ns) and low conduction loss (V_F ≤ 1.3 V @ 1 A, 25°C). Its TS-1 package supports surface-mount reflow with pure tin-plated leads compliant to J-STD-002.

Designed for operation across -55°C to +150°C junction temperature range, it delivers stable reverse leakage (I_R ≤ 5 µA @ 25°C, ≤ 150 µA @ 125°C) and exhibits C_J = 15 pF at 1 MHz / 4 V, enabling predictable behavior in high-frequency switching topologies.

Key Specifications

Pinout & Package

Package: TS-1 - surface-mount, single-anode/single-cathode configuration with cathode band marking; lead-free, RoHS-compliant, UL 94V-0 molding compound, 0.200 g typical weight.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MUR140 and VS-1EWH04-M3/5AT, the F1T4G offers superior thermal resistance margin in TS-1 (90 °C/W) versus SMA (70 °C/W), while balancing speed and conduction loss for cost-sensitive SMT power supplies where DO-41 is not viable.

Availability

F1T4G is available at Aetrix Electronics and suitable for DC-DC converters, switching inverters, and industrial power supplies requiring stable component supply, consistent parametric performance, and long-term manufacturing continuity.

Supply support for F1T4G 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 global industrial, computing, and consumer markets since 1979.

The F1T4G belongs to TSC's TS-1 fast recovery rectifier family, engineered specifically for high-efficiency, high-reliability AC-DC and DC-DC conversion in space-constrained SMT applications.

FAQ

What is the maximum junction temperature rating for the F1T4G?

The F1T4G has a maximum junction temperature (T_JMAX) of +150°C, verified per absolute maximum ratings in the official Taiwan Semiconductor datasheet Version H2104. This rating applies under steady-state and transient thermal conditions, supporting reliable operation in enclosed industrial power supplies where ambient temperatures reach 85°C. Derating curves confirm usable current capacity down to zero at 150°C junction temperature. The F1T4G must be mounted on thermally adequate PCB copper to maintain this limit.

Does the F1T4G have automotive qualification?

The base F1T4G is not AEC-Q101 qualified; however, the variant F1T4GH is explicitly listed as AEC-Q101 qualified in the ordering information section of the Taiwan Semiconductor datasheet. F1T4GH shares identical electrical parameters and TS-1 packaging but undergoes additional stress testing for automotive under-hood use. For automotive applications, only F1T4GH should be selected - the F1T4G itself lacks the required qualification documentation and test records.

What is the reverse recovery time (t_rr) specification for the F1T4G?

The F1T4G has a reverse recovery time (t_rr) of ≤150 ns, measured under IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A per the Electrical Specifications table in the Taiwan Semiconductor datasheet. This value is confirmed for all F1T4G units and distinguishes it from higher-voltage variants (e.g., F1T5G = 250 ns). The 150 ns t_rr enables efficient operation in switch-mode power supplies operating up to ~300 kHz without excessive switching loss.

Is the F1T4G halogen-free and RoHS compliant?

Yes, the F1T4G is both RoHS compliant and halogen-free per IEC 61249-2-21, as stated in the FEATURES section of the Taiwan Semiconductor datasheet. The TS-1 package uses halogen-free molding compound, and the pure tin-plated leads meet RoHS Directive 2011/65/EU requirements. These compliance attributes are inherent to the F1T4G part number and do not require special ordering codes - no "H" or "G" suffix is needed to achieve halogen-free status.

What is the thermal resistance (R_θJA) of the F1T4G in its TS-1 package?

The F1T4G has a junction-to-ambient thermal resistance (R_θJA) of 90 °C/W, specified under standard JEDEC test conditions for the TS-1 package. This value assumes a 1-inch² copper pad on a 1-layer FR-4 PCB with no internal planes. Real-world R_θJA will improve with larger copper areas, thermal vias, or multi-layer boards. The 90 °C/W rating directly informs heatsinking decisions and derating calculations for the F1T4G in continuous 1 A operation.