Taiwan Semiconductor Corporation FR301G-K

Overview

FR301G-K from Taiwan Semiconductor is a 3A, 50V fast recovery rectifier diode in DO-201AD package, featuring 1.3V max forward voltage at 3A and 150ns reverse recovery time. It delivers low power loss in DC-DC converters and switching inverters with high surge capability (125A IFSM) and 150°C junction rating.

For engineers reviewing the FR301G-K datasheet, FR301G-K pinout, FR301G-K application, or FR301G-K equivalent, key selection criteria include VRRM=50V, trr=150ns, VF≤1.3V at 3A, DO-201AD mechanical compatibility, and RoHS/halogen-free compliance for industrial power conversion designs.

Technical Context

This single-die fast recovery rectifier uses optimized PN-junction design to achieve 150ns reverse recovery time at IF=0.5A/IR=1.0A/Irr=0.25A, enabling efficient operation in high-frequency switching topologies. Its 35°C/W junction-to-ambient thermal resistance supports sustained 3A conduction under natural convection.

The device operates across -55°C to +150°C junction temperature range with 5µA max reverse leakage at 25°C and 100µA at 125°C, ensuring stable performance in thermally demanding environments like onboard chargers and SMPS primary-side rectification.

Key Specifications

Pinout & Package

DO-201AD axial-leaded package with cathode band marking; leads are pure tin plated per J-STD-002, UL 94V-0 molded compound, and JESD 201 Class 1A whisker compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH3L06S and 1N4933, FR301G-K provides optimal balance of 3A current capacity, 150ns speed, and DO-201AD thermal robustness for mid-power industrial SMPS-neither over-specified nor thermally marginal.

Availability

FR301G-K is available at Aetrix Electronics and suitable for DC-DC converters, switching mode inverters, and general-purpose power rectification requiring stable component supply across automotive infotainment, industrial PLCs, and telecom power systems.

Supply support for FR301G-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 analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, serving global power electronics markets since 1979.

The FR30xG-K series targets cost-sensitive, high-volume power conversion applications requiring reliable fast recovery performance across 50–1000V voltage grades with standardized DO-201AD packaging.

FAQ

What is the maximum junction temperature rating for FR301G-K?

The FR301G-K has a maximum junction temperature (TJ MAX) of +150°C, allowing operation in high-temperature environments such as enclosed power supplies or motor drive control boards. This rating is validated per JEDEC test conditions and supports continuous 3A conduction when thermal design maintains junction temperature ≤150°C. The FR301G-K's 35°C/W RθJA enables this with appropriate PCB copper area and airflow.

Does FR301G-K meet RoHS and halogen-free requirements?

Yes, FR301G-K is RoHS compliant and halogen-free per IEC 61249-2-21, using bromine-free flame retardants in its UL 94V-0 molding compound. Lead finishes are pure tin per J-STD-002, and the device passes JESD 201 Class 1A whisker testing. These qualifications make FR301G-K suitable for consumer, industrial, and green-energy applications with strict environmental compliance mandates.

What is the reverse recovery time (trr) specification for FR301G-K?

The FR301G-K has a reverse recovery time (trr) of 150ns, measured under IF = 0.5A, IR = 1.0A, and Irr = 0.25A per JEDEC standard test conditions. This value is confirmed in the official Taiwan Semiconductor datasheet Version C2105 and enables efficient operation in switching converters up to 500kHz. The FR301G-K's trr is significantly faster than general-purpose rectifiers like 1N4007 (≈2μs), reducing switching losses in high-frequency designs.

Can FR301G-K replace 1N5408 in a 3A power supply design?

FR301G-K can replace 1N5408 in many 3A applications due to identical 3A average current and DO-201AD package compatibility, but offers superior performance: 150ns trr vs. ~2μs, 1.3V VF vs. ~1.1V (but at lower test current), and 125A IFSM vs. 100A. However, verify layout thermal relief and ensure reverse voltage does not exceed 50V-1N5408's 1000V rating is not matched. FR301G-K is optimized for high-frequency efficiency, not ultra-high-voltage blocking.

What is the forward voltage drop of FR301G-K at rated current?

The FR301G-K exhibits a maximum forward voltage (VF) of 1.3V at 3A and 25°C junction temperature, per the manufacturer's electrical specifications table. This value is measured under pulsed conditions (PW = 0.3ms) to avoid self-heating effects. At elevated temperatures (e.g., 125°C), VF decreases slightly, improving conduction efficiency in thermally saturated operation-critical for sustained 3A loads in compact enclosures.