Taiwan Semiconductor Corporation SFA806GH

Overview

SFA806GH from Taiwan Semiconductor is an AEC-Q101-qualified super fast rectifier diode in TO-220AC package, rated for 400 V repetitive peak reverse voltage (V_RRM), 8 A average forward current (I_F), and 125 A non-repetitive surge current (I_FSM). It delivers low forward voltage drop (1.300 V at 8 A, 25°C) and ultra-fast reverse recovery (35 ns), making it suitable for high-frequency switching power supplies in automotive and industrial converters.

For engineers reviewing the SFA806GH datasheet, SFA806GH pinout, SFA806GH application, or SFA806GH equivalent, key selection factors include its AEC-Q101 qualification, 400 V V_RRM, 35 ns trr, 1.300 V VF at 8 A, and TO-220AC thermal performance (R_θJC = 4°C/W).

Technical Context

The SFA806GH employs a single-die silicon PN junction optimized for super-fast recovery with controlled minority-carrier lifetime. Its 400 V V_RRM and 35 ns trr enable efficient operation in 50–100 kHz DC/DC converters and freewheeling paths where low switching loss is critical.

Thermally, the TO-220AC package provides 4°C/W junction-to-case resistance and supports mounting torque up to 0.56 N·m. The device operates across –55°C to +150°C junction temperature range and meets JESD201 Class 2 whisker resistance and RoHS/halogen-free requirements.

Key Specifications

Pinout & Package

TO-220AC package: 3-lead, single-anode/single-cathode configuration with isolated tab (cathode-connected tab). Matte tin-plated leads compliant with J-STD-002 solderability. Polarity marked on device body.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH8R04DJF and MUR840E, the SFA806GH uniquely combines AEC-Q101 qualification, 1.300 V VF, and 35 ns trr in a single TO-220AC offering-making it optimal for automotive-grade 400 V rectification where both reliability and efficiency are prioritized.

Availability

SFA806GH is available at Aetrix Electronics and suitable for automotive DC/DC converters, industrial switch-mode power supplies, and UPS inverter output stages requiring stable component supply with AEC-Q101 compliance and consistent thermal performance.

Supply support for SFA806GH 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 SFA801G–SFA808G series was designed specifically for high-efficiency, high-reliability rectification in automotive-grade power conversion systems, emphasizing AEC-Q101 qualification, low VF, and fast recovery across 50–600 V voltage grades.

FAQ

What is the maximum junction temperature rating for the SFA806GH?

The SFA806GH has a maximum junction temperature (T_J) of +150°C and a minimum of –55°C. This wide operating range supports deployment in under-hood automotive environments and high-ambient industrial enclosures. Thermal design must ensure that actual junction temperature stays within this limit under worst-case power dissipation and ambient conditions, using the specified R_θJC = 4°C/W and appropriate heatsinking. The SFA806GH datasheet confirms this rating applies across all operating conditions.

Is the SFA806GH pin-compatible with other devices in the SFA801G–SFA808G family?

Yes, all SFA801G–SFA808G devices share identical TO-220AC package dimensions, pinout (anode–cathode–tab), and mechanical mounting specifications-including 0.56 N·m maximum torque and polarity marking location. This allows direct substitution across the family for voltage grade changes without PCB layout modification. The SFA806GH maintains full mechanical compatibility while delivering its specific 400 V V_RRM and 1.300 V V_F performance.

Does the SFA806GH require a heatsink in typical 8 A operation?

Yes, sustained 8 A operation requires external heatsinking due to conduction and switching losses. With R_θJC = 4°C/W and typical V_F = 1.300 V, power dissipation exceeds 10 W at full load-necessitating a heatsink to maintain T_J ≤ 150°C. The SFA806GH thermal model assumes case temperature ≤ 100°C for rated I_F; proper heatsink design using the tab interface is essential for reliability.

What does the "H" suffix signify in SFA806GH?

Per Taiwan Semiconductor's ordering information, the "H" suffix in SFA806GH explicitly denotes AEC-Q101 qualification. This means the device has undergone rigorous stress testing-including temperature cycling, high-temperature operating life, and mechanical shock-to meet automotive electronic component reliability standards. The SFA806GH is certified for use in automotive powertrain and chassis systems where functional safety and long-term robustness are mandatory.

How does the reverse recovery time of the SFA806GH compare to standard fast recovery diodes?

The SFA806GH has a reverse recovery time (t_rr) of 35 ns under standardized test conditions (I_F = 0.5 A, I_R = 1.0 A, I_rr = 0.25 A), placing it in the super fast recovery category. This is approximately 40–60% faster than standard fast recovery diodes (typically 60–100 ns), resulting in significantly lower switching losses and reduced EMI generation in high-frequency converters. The SFA806GH achieves this via optimized carrier lifetime control in its silicon die structure.