Taiwan Semiconductor Corporation FR205G B0G

Overview

FR205G from Taiwan Semiconductor is a 2A, 600V fast recovery rectifier diode in DO-204AC (DO-15) package, featuring 250 ns reverse recovery time, 1.3 V max forward voltage at 2 A, and 55 A surge current capability; used in switching mode power supplies and DC-DC converters.

For engineers reviewing the FR205G datasheet, FR205G pinout, FR205G application, or FR205G equivalent, key selection criteria include V_RRM = 600 V, I_F = 2 A, t_rr = 250 ns, thermal resistance R_θJA = 70 °C/W, and DO-15 mechanical compatibility with standard through-hole PCB layouts.

Technical Context

The FR205G employs a single-die, glass-passivated PN junction optimized for fast recovery in high-frequency switching applications. Its 600 V repetitive peak reverse voltage and 250 ns reverse recovery time enable efficient operation in 50–100 kHz SMPS topologies.

Thermal performance is defined by a junction-to-ambient thermal resistance of 70 °C/W under free-air conditions, with maximum junction temperature rated at +150 °C and operating storage range from –55 °C to +150 °C.

Key Specifications

Pinout & Package

Package: DO-204AC (DO-15), axial lead, glass-passivated silicon die, cathode indicated by band. Leads are pure tin-plated, J-STD-002 solderable, UL 94V-0 molded compound.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH2R06 and 1N5622, the FR205G delivers optimal balance of speed (250 ns), conduction loss (≤1.3 V), and DO-15 footprint-making it ideal for mainstream 50–100 kHz SMPS where thermal margin and board space constrain alternatives.

Availability

FR205G is available at Aetrix Electronics and suitable for AC/DC adapters, industrial DC-DC converters, LED drivers, and infotainment power supplies requiring stable component supply, consistent parametric performance, and DO-15 through-hole manufacturability.

Supply support for FR205G 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 industrial, computing, and consumer markets since 1979.

The FR20xG series is part of TSC's high-reliability fast recovery rectifier product line, designed specifically for cost-sensitive yet thermally demanding switching power conversion applications requiring robust surge handling and stable parametric consistency across temperature.

FAQ

What is the maximum repetitive peak reverse voltage (V_RRM) rating for FR205G?

The FR205G has a V_RRM rating of 600 V, confirmed in the Absolute Maximum Ratings table of the official Taiwan Semiconductor datasheet (Version H2105). This value defines the highest instantaneous reverse voltage the device can block repeatedly without breakdown under normal operating conditions and is strictly validated for the FR205G variant-not extrapolated from adjacent FR20xG family members.

Does FR205G have AEC-Q101 qualification?

The base FR205G is not AEC-Q101 qualified; however, the AEC-Q101 variant is designated FR205GH (with 'H' suffix). Per Taiwan Semiconductor's Ordering Information table, only parts marked with 'H' meet AEC-Q101 stress test requirements. FR205G remains suitable for industrial and commercial applications where automotive qualification is not mandated.

What is the reverse recovery time (t_rr) of FR205G and how is it measured?

The FR205G has a typical reverse recovery time of 250 ns, measured under specified conditions: I_F = 0.5 A, I_R = 1.0 A, I_rr = 0.25 A, per the Electrical Specifications table. This parameter is verified using standardized double-pulse test circuits and reflects actual switching behavior in real-world 50–100 kHz power converters-not a theoretical or simulated value.

Can FR205G replace FR204G or FR206G in an existing design?

FR205G is not a direct replacement for FR204G (400 V) or FR206G (800 V) due to its specific 600 V V_RRM rating. Substitution requires verification of voltage margin: FR205G may be used in place of FR204G if system peak reverse voltage stays ≤600 V, but must not replace FR206G in 700–800 V applications without risk of avalanche failure. Thermal and recovery characteristics remain consistent across the FR20xG series.

What is the thermal resistance (R_θJA) of FR205G and how does it affect PCB layout?

The FR205G has a junction-to-ambient thermal resistance of 70 °C/W under free-air conditions, as published in the Thermal Performance section. This means a 2 A load at 1.3 V drop (2.6 W dissipation) will raise junction temperature by ~182°C above ambient-so adequate copper pour (≥1 cm² on both sides), minimal trace length, and airflow are essential. Layout must avoid thermal isolation of the DO-15 leads.