Taiwan Semiconductor Corporation FR105GH

Overview

FR105GH from Taiwan Semiconductor is a 1A, 600V fast recovery rectifier diode in DO-204AL (DO-41) package, featuring 250ns reverse recovery time, 1.3V max forward voltage at 1A, and AEC-Q101 qualification for automotive-grade reliability.

For engineers reviewing the FR105GH datasheet, FR105GH pinout, FR105GH application, or FR105GH equivalent, key selection criteria include its 600V repetitive peak reverse voltage, 30A surge capability, glass-passivated junction, RoHS/halogen-free compliance, and suitability for high-efficiency DC-DC and SMPS designs requiring stable thermal performance (R_θJA = 70°C/W).

Technical Context

This discrete silicon rectifier uses a single-die construction with glass passivation to ensure robust junction protection and long-term stability under thermal cycling. Its fast recovery (250ns) enables efficient operation in switching frequencies up to several hundred kHz without excessive switching loss.

The device operates across –55°C to +150°C junction temperature range, supports 1A average forward current with derating above 75°C ambient, and maintains low leakage (≤5µA at 25°C, ≤100µA at 125°C) under rated reverse voltage - critical for standby power and high-temperature industrial converters.

Key Specifications

Pinout & Package

Package: DO-204AL (DO-41), axial leaded, glass-passivated silicon die, cathode indicated by band. Weight: 0.340 g. UL 94V-0 molding compound; pure tin-plated leads compliant with J-STD-002 solderability.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH1R06U and MUR106, FR105GH uniquely balances AEC-Q101 compliance, DO-41 form factor, 250ns recovery, and 1.3V V_F - making it optimal for space-constrained automotive and industrial converters needing verified reliability without thermal overhead.

Availability

FR105GH 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 AEC-Q101 traceability.

Supply support for FR105GH 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 FR101G–FR107G family was designed specifically for high-reliability rectification in automotive power systems and industrial SMPS, emphasizing AEC-Q101 qualification, thermal robustness, and consistent fast-recovery performance across voltage grades.

FAQ

What is the maximum junction temperature rating for FR105GH?

The FR105GH has a maximum junction temperature (T_JMAX) of +150°C, validated per AEC-Q101 stress testing. This allows reliable operation in under-hood automotive environments and high-ambient industrial enclosures. Derating begins above 75°C ambient, and the 70°C/W thermal resistance requires adequate PCB copper area to maintain safe T_J at full 1A load. The FR105GH's glass passivation helps sustain this rating across thermal cycles.

Is FR105GH pin-compatible with standard DO-41 rectifiers like 1N4007?

Yes, FR105GH uses the DO-204AL (DO-41) package with identical mechanical dimensions and axial lead configuration as 1N4007, enabling direct PCB footprint replacement. However, FR105GH offers faster recovery (250ns vs. >2µs), lower V_F (1.3V vs. ~1.55V), and AEC-Q101 qualification - making it a performance upgrade, not just a drop-in substitute. Polarity marking (cathode band) matches industry standard.

What does the "H" suffix in FR105GH signify?

The "H" suffix in FR105GH indicates full AEC-Q101 qualification per Rev D, covering stress tests including HTSL, TC, UHAST, and bond wire pull. It is not merely a screening option but a certified automotive-grade variant - distinct from non-H versions (e.g., FR105G) which lack this qualification. This makes FR105GH suitable for ASIL-B relevant power stages without additional component-level validation.

How does FR105GH perform at elevated temperature?

At 125°C junction temperature, FR105GH exhibits ≤100µA reverse leakage (vs. ≤5µA at 25°C) and maintains rated 600V blocking - critical for high-temp industrial converters. Its forward voltage increases only modestly (~5–8%), preserving conduction efficiency. The glass-passivated junction ensures stable parameter drift over time, unlike epoxy-passivated alternatives prone to humidity-induced degradation at elevated T_J.

Can FR105GH be used in high-frequency switching applications above 200kHz?

Yes, FR105GH's 250ns reverse recovery time supports reliable operation up to ~500kHz in hard-switched topologies such as flyback and forward converters. Its low junction capacitance (10pF @ 4V) minimizes capacitive turn-on loss, and the fast recovery reduces diode tail current - key for minimizing EMI and MOSFET switching stress. For >1MHz operation, consider ultrafast variants like MUR106 (75ns), but FR105GH remains optimal for cost- and space-constrained 200–400kHz designs.