Taiwan Semiconductor Corporation SFA808GH

Overview

SFA808GH from Taiwan Semiconductor is an AEC-Q101-qualified super fast rectifier diode in TO-220AC package, rated for 600 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 (1.700 V at 8 A, 25°C), 60 pF junction capacitance, and 35 ns reverse recovery time - optimized for high-efficiency DC/DC converters and freewheeling in automotive-grade switching inverters.

For engineers reviewing the SFA808GH datasheet, SFA808GH pinout, SFA808GH application, or SFA808GH equivalent, key selection criteria include its 600 V V_RRM, AEC-Q101 qualification, TO-220AC thermal performance (R_θJC = 4°C/W), 150°C max junction temperature, and verified 35 ns trr for high-frequency switching stability.

Technical Context

The SFA808GH employs a single-die silicon PN junction structure optimized for super-fast recovery (trr ≤ 35 ns) under I_F = 0.5 A, I_R = 1.0 A, I_rr = 0.25 A test conditions. Its 600 V V_RRM rating enables use in 400 V DC bus systems with safety margin, while R_θJC = 4°C/W supports thermal management in constrained automotive power modules.

Electrical behavior is characterized by low leakage (I_R ≤ 10 µA @ 25°C, ≤ 400 µA @ 125°C), stable VF of 1.700 V at 8 A/25°C, and junction capacitance of 60 pF at 1 MHz/4.0 V - confirming suitability for >100 kHz switching topologies where capacitive loss and reverse conduction must be minimized.

Key Specifications

Pinout & Package

TO-220AC package: single-ended, 2-terminal through-hole device with isolated tab (cathode-connected case). Mounting torque ≤ 0.56 N·m; matte tin-plated leads compliant with J-STD-002 solderability.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH8R06D and MUR860E, the SFA808GH uniquely combines AEC-Q101 qualification, lowest VF (1.700 V), and best thermal resistance (4°C/W) - making it optimal for space- and efficiency-constrained automotive power modules where thermal headroom and long-term reliability are non-negotiable.

Availability

SFA808GH is available at Aetrix Electronics and suitable for automotive DC/DC converters, industrial switching inverters, and solar microinverters requiring stable component supply with AEC-Q101 compliance and consistent TO-220AC packaging.

Supply support for SFA808GH 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, specializing in power rectifiers, TVS diodes, and MOSFETs for industrial and automotive markets.

The SFA800G series was designed specifically for high-reliability, high-frequency power conversion in automotive and industrial environments - emphasizing AEC-Q101 qualification, low-loss super-fast recovery, and robust thermal performance in TO-220AC.

FAQ

What is the maximum junction temperature rating for the SFA808GH?

The SFA808GH has a maximum junction temperature (T_J(max)) of +150°C, validated across its full operating range. This rating enables reliable operation in under-hood automotive environments and sealed industrial enclosures. The device's R_θJC of 4°C/W allows precise thermal modeling when paired with a heatsink - ensuring SFA808GH stays within safe limits even at full 8 A load and elevated ambient temperatures.

Is the SFA808GH pin-compatible with other TO-220AC rectifiers like the MUR860E?

Yes, the SFA808GH uses the standard TO-220AC mechanical outline with identical lead spacing, tab mounting hole, and terminal geometry as MUR860E and STTH8R06D. All three share Anode–Cathode (tab) pinout configuration and require the same PCB footprint and heatsink interface. However, electrical differences - especially forward voltage and thermal resistance - must be re-validated in the target circuit before substitution.

Does the SFA808GH meet automotive qualification standards?

Yes, the "H" suffix in SFA808GH explicitly denotes AEC-Q101 qualification per Version K2103 documentation. This includes passing high-temperature operating life (HTOL), temperature cycling (TC), and unbiased highly accelerated stress test (UHAST) - confirming suitability for automotive powertrain and chassis applications. Non-H variants (e.g., SFA808G) lack this qualification and are intended for industrial use only.

What is the reverse recovery time (t_rr) specification for the SFA808GH and how is it tested?

The SFA808GH has a typical reverse recovery time (t_rr) of 35 ns, measured under standardized conditions: I_F = 0.5 A, I_R = 1.0 A, I_rr = 0.25 A, with specified di/dt and voltage ramp rates. This value is confirmed across production lots and reflects actual switching behavior in high-frequency converters. The 35 ns t_rr directly contributes to reduced switching loss and lower EMI generation compared to slower rectifiers.

How does the forward voltage (V_F) of the SFA808GH compare to similar 600 V rectifiers?

The SFA808GH specifies a maximum forward voltage of 1.700 V at 8 A and 25°C - among the lowest in its class. For comparison, STTH8R06D is rated at 1.85 V and MUR860E at 1.75 V under identical conditions. This 0.05–0.15 V advantage translates to measurable conduction loss reduction (e.g., 0.4–1.2 W saved at 8 A), improving overall system efficiency and thermal margin in high-power-density designs using SFA808GH.