Taiwan Semiconductor Corporation SFF1605G

Overview

SFF1605G from Taiwan Semiconductor is a 16A, 300V super fast rectifier diode in ITO-220AB package, featuring 35ns reverse recovery time, 1.300V forward voltage at 8A/25°C, and 50pF junction capacitance per diode - deployed in DC-DC converters and switching inverters requiring high-efficiency freewheeling.

For engineers reviewing the SFF1605G datasheet, SFF1605G pinout, SFF1605G application, or SFF1605G equivalent, key selection criteria include its 300V V_RRM, 125A I_FSM, 1.5°C/W R_θJC, AEC-Q101 qualification option (SFF1605GH), and dual-die construction for thermal robustness in high-reliability power conversion designs.

Technical Context

The SFF1605G is a single-phase, dual-die super fast recovery rectifier optimized for high-frequency switching applications. Its 35ns trr and low 1.300V VF at 8A enable reduced switching losses in SMPS topologies operating up to several hundred kHz.

Thermally, it delivers 1.5°C/W junction-to-case resistance in the ITO-220AB package with matte tin-plated leads compliant to J-STD-002, supporting reliable conduction under 16A continuous forward current and 125A surge peaks per JEDEC JESD201 Class 2 whisker testing.

Key Specifications

Pinout & Package

Package: ITO-220AB - Insulated TO-220 variant with internal isolation barrier, UL 94V-0 molding compound, and matte tin-plated leads suitable for wave and reflow soldering per J-STD-002.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH1603CW and MUR1630CT, the SFF1605G offers superior thermal performance (1.5°C/W vs. ≥2.0°C/W), true ITO-220AB isolation, and tighter t_rr consistency - making it optimal for space-constrained, high-frequency, and automotive-qualified systems where thermal management and reliability are prioritized.

Availability

SFF1605G is available at Aetrix Electronics and suitable for DC-DC converters, switching inverters, and freewheeling applications requiring stable component supply, long-term lifecycle support, and RoHS/halogen-free compliance.

Supply support for SFF1605G 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 power discrete manufacturer headquartered in Hsinchu, Taiwan, serving industrial, computing, and automotive markets since 1979.

The SFF1601G–SFF1608G series was designed specifically for high-efficiency, high-reliability power conversion - emphasizing fast recovery, low VF, and rugged packaging for demanding SMPS, UPS, and motor control applications.

FAQ

What is the maximum junction temperature rating for the SFF1605G?

The SFF1605G has a maximum junction temperature (T_J) of +150°C, with an operational range from –55°C to +150°C. This rating allows sustained 16A conduction in ambient temperatures up to 100°C when properly heatsinked, leveraging its 1.5°C/W R_θJC. Derating curves in the official TSC datasheet confirm usable current drops linearly above 75°C case temperature. The SFF1605G maintains parameter stability within this envelope under specified test conditions.

Is the SFF1605G pin-compatible with other devices in the SFF160xG family?

Yes - all SFF1601G through SFF1608G share identical ITO-220AB package dimensions, pinout (Anode–Cathode–Isolated Tab), and mechanical mounting interface. Voltage ratings differ only in internal die design; no PCB layout change is needed when upgrading from SFF1604G (200V) to SFF1605G (300V) or higher variants. The SFF1605G retains the same marking format, lead finish, and torque spec (0.56 N·m max).

Does the SFF1605G meet automotive qualification standards?

The base SFF1605G is not AEC-Q101 qualified, but its variant SFF1605GH is fully AEC-Q101 certified per Version I2105 documentation. The GH suffix denotes qualification for automotive under-hood use, including extended temperature cycling, humidity resistance, and mechanical vibration testing. For non-automotive industrial applications, the standard SFF1605G remains suitable and widely deployed in telecom and server power supplies.

What is the reverse recovery charge (Q_rr) specification for the SFF1605G?

The SFF1605G datasheet does not publish Q_rr as a standalone parameter; only t_rr = 35 ns is specified under IF = 0.5A, IR = 1.0A, Irr = 0.25A test conditions. While Q_rr can be estimated from trr and di/dt in circuit simulation, TSC provides no guaranteed Q_rr value for the SFF1605G. Designers should rely on measured t_rr and VF data for loss calculation, and verify switching behavior in actual application conditions using the SFF1605G evaluation curves.

How does the junction capacitance of the SFF1605G affect high-frequency EMI performance?

With 50 pF junction capacitance per diode at 1 MHz and 4.0V reverse bias, the SFF1605G exhibits lower capacitive coupling than earlier-generation fast rectifiers (e.g., 80 pF in SFF1601G–SFF1604G). This reduces high-frequency displacement current during voltage transitions, lowering common-mode EMI generation in >200 kHz SMPS designs. Layout best practices - such as minimizing loop area and using local RC snubbers - remain essential, but the SFF1605G's lower C_J directly contributes to cleaner switching node waveforms and easier EMI filter sizing.