Taiwan Semiconductor Corporation SFAF804G

Overview

SFAF804G from Taiwan Semiconductor is an 8A, 200V repetitive peak reverse voltage (V_RRM) super fast rectifier diode in ITO-220AC package, featuring 35ns reverse recovery time (t_rr), 0.95V forward voltage at 8A/25°C, and 4°C/W junction-to-case thermal resistance - used in high-frequency DC-DC converters and switching inverters.

For engineers reviewing the SFAF804G datasheet, SFAF804G pinout, SFAF804G application, or SFAF804G equivalent, key selection criteria include V_RRM = 200V, t_rr ≤ 35ns, I_F = 8A continuous, thermal performance (R_θJC = 4°C/W), and AEC-Q101 qualification availability (SFAF804GH variant).

Technical Context

This super fast rectifier employs a glass passivated silicon junction to achieve low forward voltage and rapid carrier recombination. Its 35ns reverse recovery time enables operation in high-frequency switching topologies up to several hundred kHz without excessive switching loss.

The ITO-220AC package provides direct heatsink mounting capability with 0.56 N·m maximum torque and meets UL 94V-0 flammability rating. Polarity is marked on the device body, and terminals are matte tin-plated per J-STD-002 solderability standard.

Key Specifications

Pinout & Package

ITO-220AC package: single-diode configuration with anode and cathode leads mounted on a copper tab for direct heatsink attachment. Cathode is marked by a band on the device body. Leads are matte tin-plated and compliant with J-STD-002 solderability requirements.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH8L06D and ES8D, the SFAF804G offers optimal balance of low V_F, UL recognition, and cost-effective 200V rating - making it ideal for industrial 200V-output SMPS where thermal efficiency and safety certification are prioritized over ultra-high voltage margin.

Availability

SFAF804G is available at Aetrix Electronics and suitable for DC-DC converter output rectification, switching inverter freewheeling, and industrial SMPS input bridge applications requiring stable component supply, long-lifecycle support, and traceable sourcing.

Supply support for SFAF804G 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 automotive markets since 1979.

The SFAF80xG series targets high-efficiency power conversion in space-constrained, thermally demanding applications - designed specifically for next-generation SMPS, motor drives, and renewable energy interfaces where speed, reliability, and regulatory compliance are critical.

FAQ

What is the maximum repetitive peak reverse voltage (V_RRM) of the SFAF804G?

The SFAF804G has a V_RRM rating of 200 V, as defined in the Absolute Maximum Ratings table of its datasheet. This value is fixed for the SFAF804G variant and distinguishes it from other members of the SFAF801G–SFAF808G family, which range from 50 V to 600 V. Exceeding this voltage risks avalanche breakdown and permanent damage to the SFAF804G.

Is the SFAF804G pin-compatible with other devices in the SFAF80xG series?

Yes, all SFAF80xG devices share identical ITO-220AC packaging, pinout, and mechanical dimensions - including SFAF804G. Anode, cathode, and tab connections remain consistent across the family, enabling voltage-rating flexibility without PCB layout changes. However, electrical parameters such as V_F and C_J vary by voltage grade, so system validation is required when substituting SFAF804G for another variant.

Does the SFAF804G meet automotive reliability standards?

The base SFAF804G is not AEC-Q101 qualified, but the SFAF804GH variant is explicitly rated to AEC-Q101. The "H" suffix denotes qualification per stress test conditions including HTOL, TC, and HAST. For automotive applications, specify SFAF804GH - the SFAF804G itself lacks the required test documentation and screening, and should not be deployed in vehicle ECUs or ADAS subsystems.

What is the thermal resistance from junction to case (R_θJC) for the SFAF804G?

The SFAF804G has a typical junction-to-case thermal resistance (R_θJC) of 4°C/W, as specified in the Thermal Performance section of the datasheet. This value applies under standard mounting conditions using recommended torque (≤0.56 N·m) and thermal interface material. It enables accurate junction temperature estimation: T_J = T_C + (P_tot × 4°C/W), where P_tot includes both conduction and switching losses.

How does the SFAF804G's reverse recovery time compare to standard fast rectifiers?

The SFAF804G achieves a maximum reverse recovery time (t_rr) of 35 ns under standardized test conditions (I_F = 0.5A, I_R = 1.0A, I_rr = 0.25A), classifying it as a super fast rectifier. This is approximately 3× faster than standard fast rectifiers (typically 100–150 ns), reducing reverse recovery charge (Q_rr) and associated switching losses - a key advantage in 200–500 kHz SMPS designs where the SFAF804G is commonly applied.