Taiwan Semiconductor Corporation FR306G

Overview

FR306G from Taiwan Semiconductor is a single-die fast recovery rectifier in DO-201AD package, rated for 800 V repetitive peak reverse voltage (V_RRM), 3 A average forward current (I_F), and 500 ns reverse recovery time (t_rr) at I_F = 0.5 A, I_R = 1.0 A, I_rr = 0.25 A - used in high-efficiency DC-DC converters and switching inverters.

For engineers reviewing the FR306G datasheet, FR306G pinout, FR306G application, or FR306G equivalent, key selection criteria include its 800 V V_RRM, 125 A non-repetitive surge rating (I_FSM), 1.3 V max forward voltage at 3 A, 5 µA max reverse leakage at 25°C, and DO-201AD mechanical compatibility with automated through-hole and surface-mount reflow assembly.

Technical Context

The FR306G employs a planar epitaxial silicon junction structure optimized for fast recovery (500 ns) and low conduction loss. Its thermal resistance (R_θJA = 35 °C/W) supports operation up to 150 °C junction temperature with adequate PCB copper area.

It operates as a unidirectional power switch in flyback, forward, and boost topologies - blocking up to 800 V in reverse bias while conducting 3 A continuously, with 125 A surge capability for transient line events and startup conditions.

Key Specifications

Pinout & Package

Package: DO-201AD - axial-leaded, molded plastic case with cathode band marking; RoHS-compliant, halogen-free, UL 94V-0 rated compound; pure tin-plated leads per J-STD-002.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH3L06S and MUR3080CT, the FR306G offers optimal balance of 800 V rating, 500 ns recovery, DO-201AD compactness, and cost-effective through-hole/SMT hybrid assembly - making it preferred for space-constrained, medium-frequency industrial and telecom power supplies.

Availability

FR306G is available at Aetrix Electronics and suitable for DC-DC converters, switching inverters, and AC-DC adapters requiring stable component supply, consistent parametric performance, and long-term manufacturing continuity.

Supply support for FR306G 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 FR301G–FR307G series was developed to deliver AEC-Q101-capable, high-reliability fast recovery rectifiers with standardized DO-201AD packaging for cost-sensitive, high-volume power conversion applications.

FAQ

What is the maximum repetitive peak reverse voltage (V_RRM) for FR306G?

The FR306G has a maximum repetitive peak reverse voltage (V_RRM) of 800 V, as confirmed in the Absolute Maximum Ratings table of the official Taiwan Semiconductor datasheet (Version H2105). This rating defines the highest reverse voltage the device can block repeatedly without breakdown under normal operating conditions. Exceeding this value risks avalanche failure or permanent degradation of the FR306G junction.

Is FR306G suitable for automotive applications?

The base FR306G is not AEC-Q101 qualified; however, the variant FR306GH is explicitly qualified to AEC-Q101 and shares identical electrical specifications. For automotive body electronics or infotainment power supplies requiring qualification, FR306GH must be specified - the FR306G itself is intended for industrial and commercial power systems where qualification is not mandated.

What is the forward voltage (V_F) of FR306G at rated current?

The FR306G exhibits a maximum forward voltage (V_F) of 1.3 V at 3 A forward current and 25°C junction temperature, per the Electrical Specifications table. This value is measured under pulsed conditions (PW = 0.3 ms) and represents worst-case conduction loss - actual V_F decreases slightly at lower currents or higher temperatures, but design margins should be based on the 1.3 V max specification for the FR306G.

Does FR306G have a defined reverse recovery time (t_rr)?

Yes, the FR306G has a specified reverse recovery time (t_rr) of 500 ns, measured under conditions of I_F = 0.5 A, I_R = 1.0 A, and I_rr = 0.25 A. This parameter is documented in the Electrical Specifications section of the FR301G–FR307G datasheet and distinguishes FR306G from slower general-purpose rectifiers - enabling its use in switching frequencies up to ~500 kHz with controlled turn-off loss.

What package type does FR306G use, and what are its key mechanical features?

The FR306G uses the DO-201AD package: an axial-leaded, molded plastic case with cathode band polarity marking. Key mechanical features include UL 94V-0 flammability rating, pure tin-plated leads compliant with J-STD-002 solderability, JESD201 Class 2 whisker resistance, and approximate weight of 1.20 g. These attributes ensure robust manufacturability and long-term reliability for the FR306G in both wave-soldered and reflow-assembled boards.