Diodes Incorporated DSR8F600

Overview

DSR8F600 from Diodes Incorporated is a 600V, 8A hyperfast rectifier diode designed specifically as a boost diode in continuous conduction mode (CCM) power factor correction (PFC) circuits. It delivers 1.95V typical forward voltage at 8A/25°C, 20ns maximum reverse recovery time, and 5.9A peak reverse recovery current at 125°C - enabling high-efficiency operation in telecom and server SMPS.

For engineers reviewing the DSR8F600 datasheet, DSR8F600 pinout, DSR8F600 application, or DSR8F600 equivalent, key selection criteria include soft-switching behavior for EMI reduction, low QRR (85nC) to minimize recovery losses, thermal resistance of 3.4°C/W (junction-to-case), and TO220AC package compatibility with standard heatsink mounting.

Technical Context

This hyperfast rectifier employs optimized silicon epitaxial structure and tailored carrier lifetime control to achieve soft reverse recovery with minimal ringing. Its 14.6–20ns tRR (at low-current test conditions) and 35–45ns tRR (at 8A/300A/µs) reflect dual-mode switching performance calibrated for both light-load stability and full-power PFC efficiency.

The device operates with a maximum junction temperature of +150°C and supports DC blocking up to 600V. Its 9.3pF junction capacitance at 40V/1MHz and 3.9µA typical leakage at 600V/25°C support stable high-frequency operation in hard-switched boost stages without excessive capacitive loading or standby loss.

Key Specifications

Pinout & Package

Package: TO220AC - molded plastic case with UL 94V-0 flammability rating, matte tin-plated copper leadframe, and 1.75g mass. Designed for vertical mounting with case acting as cathode terminal.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH8R06D and MUR860E, the DSR8F600 offers the lowest QRR and fastest soft-recovery profile among TO220AC 8A hyperfast rectifiers - delivering measurable efficiency gain in high-frequency, high-density PFC topologies.

Availability

DSR8F600 is available at Aetrix Electronics and suitable for server power supplies, telecom rectifiers, flat-panel TV power systems, and industrial SMPS requiring stable component supply and long-term manufacturing continuity.

Supply support for DSR8F600 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and the Americas.

The DSR8F600 belongs to Diodes' Hyperfast Rectifier product line, engineered specifically for high-efficiency, high-frequency power factor correction in enterprise and communications infrastructure.

FAQ

What is the maximum allowable case temperature for continuous 8A operation?

The DSR8F600 supports 8A average current continuously when case temperature (TC) remains ≤100°C, per Figure 5 derating curve. At TC = 100°C, the device maintains full 8A rating due to its 3.4°C/W RθJC and 150°C TJ(max); exceeding this requires thermal redesign or current derating.

Does the TO220AC package require insulating hardware when mounted to a heatsink?

Yes - the TO220AC case is electrically connected to the cathode (Pins 2 and 3), so electrical isolation is required if the heatsink is grounded or at a different potential. Use mica or ceramic washers with compatible thermal grease to maintain <1.5°C/W total interface resistance while ensuring dielectric strength ≥2kV.

How does the DSR8F600's soft recovery affect EMI in PFC designs?

Its soft reverse recovery suppresses high-frequency ringing during diode turn-off, reducing common-mode noise amplitude by 8–12dB in the 30–100MHz band. This directly lowers filtering requirements - often allowing reduction of Y-capacitor values by 20–30% while maintaining EN55022 compliance.

Can the DSR8F600 replace standard ultrafast rectifiers like UF806 in existing PFC layouts?

Yes - it shares identical TO220AC footprint and pinout (Anode–Cathode–Cathode), enabling drop-in replacement. However, its lower VF and faster tRR may increase PFC controller gate drive demand slightly; verify MOSFET VGS timing margins and adjust snubber values if overshoot exceeds 10% of VDS rating.