Diodes Incorporated SF164

Overview

SF164 from ON Semiconductor is a 200 V, 16 A single-phase super-fast recovery axial-lead rectifier diode in TO-220AB package, featuring 35 ns reverse recovery time, 0.975 V forward voltage at 8.0 A, and 2 K/W junction-to-case thermal resistance - used in high-frequency AC/DC power supplies and DC motor drive freewheeling paths.

For engineers reviewing the SF164 datasheet, SF164 pinout, SF164 application, or SF164 equivalent, key selection criteria include peak repetitive reverse voltage (200 V), average forward current rating (16 A), ultrafast switching (Trr < 35 ns), low leakage (<150 µA at 100°C), and thermal performance for conduction-limited power conversion stages.

Technical Context

This device operates as a unidirectional power rectifier optimized for 200 kHz switching applications. Its super-fast recovery (Trr ≤ 35 ns) minimizes switching losses during turn-off, while low VF (0.975 V @ 8 A) reduces conduction loss under high-current DC output conditions.

The TO-220AB package provides mechanical robustness and direct heatsink mounting capability. Thermal resistance of 2 K/W enables stable operation up to 125°C case temperature, supporting continuous 16 A average forward current in half-wave configurations with resistive or inductive loads.

Key Specifications

Pinout & Package

TO-220AB package with three axial leads: Cathode (marked by color band), Anode, and case-connected tab (electrically tied to cathode). Mountable in any orientation; tab serves as primary thermal path to heatsink.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH1602D and MUR1620CT, SF164 offers identical voltage/current ratings and recovery speed but uses a cathode-connected tab for simplified thermal mounting - advantageous where chassis grounding aligns with cathode potential and isolation is unnecessary.

Availability

SF164 is available at Aetrix Electronics and suitable for AC/DC power supplies, DC motor drives, uninterruptible power systems, and induction heating inverters requiring stable component supply and long-term industrial availability.

Supply support for SF164 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

ON Semiconductor is a global semiconductor manufacturer specializing in power management, analog, sensor, and discrete solutions for automotive, industrial, and cloud power applications.

SF164 belongs to the Super-Fast Recovery Rectifier product line, engineered for high-efficiency, high-frequency power conversion where low Trr and low VF are essential for minimizing both switching and conduction losses.

FAQ

Is SF164 suitable for use in a 100 kHz LLC resonant converter?

Yes. With a specified Trr ≤ 35 ns and low junction capacitance (75 pF @ 4 V), SF164 supports reliable operation in 100 kHz LLC topologies. Its 200 V VRRM and 16 A I(AV) rating accommodate typical secondary-side rectification requirements, provided case temperature remains ≤125°C under actual operating conditions.

What is the maximum allowable case temperature for continuous 16 A operation?

The datasheet specifies 16 A average forward current only at TC = 125°C. Operation above this temperature requires derating per Figure 1 - at 150°C case temperature, maximum I(AV) drops to approximately 12 A. Thermal design must ensure the tab-to-heatsink interface maintains TC ≤ 125°C under worst-case load and ambient conditions.

Does the SF164 metal tab connect internally to the cathode?

Yes. The TO-220AB package's metal tab is electrically connected to the cathode terminal, as confirmed by the polarity marking (color band on cathode lead) and mechanical drawing showing tab continuity with cathode. This eliminates need for external cathode-to-tab wiring but requires electrical isolation from other potentials unless circuit design intends cathode grounding.

Can SF164 replace SF163 in an existing design?

Yes, with voltage margin. SF164 (200 V VRRM) exceeds SF163's 150 V rating and shares identical package, thermal, and current specifications. It provides higher reverse voltage headroom - beneficial in designs subject to line surges or poorly regulated inputs - but verify that layout and snubbing remain adequate for the increased blocking capability.