Taiwan Semiconductor Corporation SFAF2004G

Overview

SFAF2004G from Taiwan Semiconductor is a single-die super fast rectifier diode rated for 20 A average forward current, 200 V repetitive peak reverse voltage (V_RRM), and 200 A non-repetitive surge current (I_FSM), with a typical forward voltage of 0.975 V at 20 A and 25°C junction temperature-used in high-efficiency DC-DC converters and switching inverters.

For engineers reviewing the SFAF2004G datasheet, SFAF2004G pinout, SFAF2004G application, or SFAF2004G equivalent, key selection considerations include its ITO-220AC package thermal resistance (3°C/W), 35 ns reverse recovery time, glass-passivated junction, and AEC-Q101 qualification availability (SFAF2004GH variant).

Technical Context

The SFAF2004G employs a planar silicon die with glass passivation to ensure stable reverse leakage (<10 µA at 25°C) and robust surge tolerance. Its 35 ns trr and low VF support high-frequency switching topologies where conduction and switching losses must be jointly minimized.

Thermally, the device uses an ITO-220AC package with a 3°C/W junction-to-case resistance and 1.70 g mass, enabling direct heatsink mounting without isolation hardware. It operates across –55°C to +150°C junction temperature range and meets UL 94V-0 and JESD201 Class 2 whisker requirements.

Key Specifications

Pinout & Package

Package: ITO-220AC - insulated thermoplastic outline with single-row 3-pin configuration (Anode, Cathode, Case tab); matte tin-plated leads; UL 94V-0 molding compound; 0.56 N·m max mounting torque; polarity marked on case.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH2002CT and VS-20EWH02-M3, the SFAF2004G offers optimal balance of cost, thermal performance (3°C/W), and proven field reliability in single-diode freewheeling roles-especially where cathode-grounded mounting simplifies mechanical integration.

Availability

SFAF2004G is available at Aetrix Electronics and suitable for DC–DC converters, switching inverters, and industrial power supplies requiring stable component supply, consistent parametric performance, and long-term manufacturing continuity.

Supply support for SFAF2004G 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 SFAF2004G belongs to TSC's Super Fast Rectifier family, engineered for high-efficiency, high-reliability power conversion in space-constrained, thermally demanding applications-emphasizing low VF, fast trr, and rugged packaging.

FAQ

What is the maximum junction temperature rating for the SFAF2004G?

The SFAF2004G has a maximum junction temperature (T_JMAX) of +150°C and a storage temperature range of –55°C to +150°C. This rating allows operation in high-ambient environments such as enclosed industrial power supplies or under-hood automotive modules when properly heatsinked. Thermal design must account for R_θJC = 3°C/W and interface resistance to avoid exceeding this limit during sustained 20 A conduction.

Is the SFAF2004G pin-compatible with other devices in the SFAF2001G–SFAF2008G series?

Yes-the entire SFAF2001G through SFAF2008G series shares identical ITO-220AC packaging, pinout, and mechanical dimensions. Only V_RRM (50 V to 600 V) and forward voltage (0.975–1.700 V) vary across the series. This enables drop-in replacement during design iteration or voltage-scaling without PCB changes, provided thermal and surge margins remain adequate for the new rating.

Does the SFAF2004G meet automotive qualification standards?

The base SFAF2004G is not AEC-Q101 qualified, but the SFAF2004GH variant is explicitly certified to AEC-Q101. Both share identical electrical and thermal specs; only the GH version undergoes additional stress testing (HTOL, TC, UHAST) and traceability controls required for automotive power electronics. For automotive use, specify SFAF2004GH-not SFAF2004G-to ensure compliance.

What is the reverse recovery time (t_rr) specification for the SFAF2004G, and under what test conditions?

The SFAF2004G has a maximum reverse recovery time (t_rr) of 35 ns, measured under IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A per JEDEC standards. This value reflects performance at room temperature and confirms suitability for switching frequencies up to 200 kHz in hard-switched topologies. At elevated junction temperatures, t_rr increases slightly but remains within 45 ns up to 125°C.

How does the glass passivation in the SFAF2004G improve long-term reliability?

Glass passivation on the SFAF2004G's silicon junction prevents moisture ingress and ion migration, significantly enhancing resistance to corrosion and parameter drift during thermal cycling and humid storage. This contributes to <10 µA reverse leakage stability over 10+ years in industrial environments and eliminates premature failure modes seen in epoxy-passivated alternatives-particularly in outdoor or factory-floor deployments.