Taiwan Semiconductor Corporation FR204GH

Overview

FR204GH from Taiwan Semiconductor is a 2A, 400V fast recovery rectifier diode in DO-204AC (DO-15) package, featuring 150 ns reverse recovery time, 1.3 V max forward voltage at 2 A, and AEC-Q101 qualification for automotive-grade reliability. It serves as the primary output rectifier in high-frequency switching power supplies.

For engineers reviewing the FR204GH datasheet, FR204GH pinout, FR204GH application, or FR204GH equivalent, key selection criteria include its 400 V repetitive peak reverse voltage, 55 A surge capability, glass-passivated junction, RoHS/halogen-free compliance, and suitability for DC-DC converters requiring low conduction loss and fast transient response.

Technical Context

This device implements a single-die, planar epitaxial fast recovery structure with glass passivation to enhance surface stability and moisture resistance. Its 150 ns trr and 10 pF junction capacitance enable efficient operation in 50–500 kHz switching topologies without excessive switching loss or ringing.

The FR204GH operates across –55°C to +150°C junction temperature range and delivers 2 A average forward current with 70°C/W junction-to-ambient thermal resistance. Its pure tin-plated leads meet J-STD-002 solderability and JESD201 Class 2 whisker resistance requirements.

Key Specifications

Pinout & Package

Package: DO-204AC (DO-15), axial leaded, epoxy-molded case meeting UL 94V-0 flammability rating. Cathode indicated by band on body.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH2R04 and MUR240, the FR204GH uniquely balances AEC-Q101 compliance, DO-15 form factor, and 150 ns trr-making it optimal for space-constrained automotive modules where qualification and footprint are mandatory, and moderate speed suffices.

Availability

FR204GH is available at Aetrix Electronics and suitable for automotive DC-DC converters, industrial switch-mode power supplies, and consumer AC-DC adapters requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for FR204GH 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 automotive, industrial, and consumer markets since 1979.

The FR20xG series was developed specifically for high-reliability, high-efficiency rectification in automotive and industrial switching power supplies-emphasizing AEC-Q101 qualification, glass passivation, and consistent parametric performance across voltage grades.

FAQ

What is the maximum junction temperature rating for FR204GH?

The FR204GH has a maximum junction temperature (TJ(max)) of +150°C, verified per AEC-Q101 stress testing. This rating allows reliable operation in under-hood automotive environments and high-ambient industrial enclosures. Derating curves confirm 2 A average forward current is sustainable up to 75°C ambient with standard DO-15 PCB pad layout. The FR204GH must be operated within this thermal limit to maintain long-term reliability and avoid parametric shift.

Is FR204GH pin-compatible with other devices in the FR20xG family?

Yes, all FR20xG variants-including FR204GH-share identical DO-204AC (DO-15) package dimensions, axial lead configuration, and cathode band polarity marking. The FR204GH uses the same mechanical footprint and soldering profile as FR201G through FR207G, enabling voltage-grade interchangeability on the same PCB layout without redesign. However, electrical parameters such as VRRM and trr differ across the family and must be validated per application.

Does FR204GH require a heatsink in typical 2 A applications?

The FR204GH typically does not require an external heatsink when operating at ≤2 A average current with ≤75°C ambient temperature and standard 1-inch² copper pour on FR-4 PCB. Its 70°C/W junction-to-ambient thermal resistance and 1.3 V VF yield ~2.6 W dissipation, which remains within safe limits under those conditions. The FR204GH's DO-15 package is optimized for natural convection cooling; forced airflow or heatsinking becomes necessary only above 85°C ambient or sustained >2.5 A loads.

What does the "H" suffix in FR204GH signify?

The "H" suffix in FR204GH denotes full AEC-Q101 qualification per Rev D test requirements-including HTOL, temperature cycling, HAST, and mechanical shock. This distinguishes FR204GH from standard FR204G, which lacks automotive qualification. The FR204GH undergoes additional screening and lot-level validation to ensure robustness in automotive powertrain, chassis, and body electronics applications where failure modes carry safety implications.

How does FR204GH compare to standard recovery rectifiers in switching efficiency?

Compared to standard recovery rectifiers (e.g., 1N4007), the FR204GH reduces total power loss by up to 40% in 100–300 kHz SMPS due to its 150 ns trr and 1.3 V VF. Standard diodes exhibit trr > 2 µs and higher VF, causing significant switching loss and voltage overshoot. The FR204GH's fast recovery minimizes reverse recovery charge (Qrr), directly lowering EMI and improving light-load regulation-critical advantages confirmed in actual FR204GH-based flyback converter measurements.