Diodes Incorporated DSR8A600

Overview

DSR8A600 from Diodes Incorporated is a soft-recovery, ultra-fast recovery silicon rectifier diode optimized as a boost diode in continuous conduction mode (CCM) Power Factor Correction (PFC) circuits. It delivers 8 A average forward current at ≤+101°C case temperature, 600 V peak repetitive reverse voltage, 2.3 V typical forward voltage at 8 A and +25°C, 20 ns reverse recovery time at 8 A / 500 A/µs, and 6.9 A peak reverse recovery current.

For engineers reviewing the DSR8A600 datasheet, DSR8A600 pinout, DSR8A600 application, or DSR8A600 equivalent, key selection criteria include soft-switching behavior for EMI reduction, low Qrr (85 nC at +25°C) to minimize recovery losses, AEC-Q101 qualification for automotive-grade reliability, TO220AC package thermal resistance (RθJL = 2 °C/W), and compatibility with hard-switched PFC topologies requiring <30 ns trr.

Technical Context

The DSR8A600 employs a soft fast-recovery epitaxial structure engineered to suppress voltage ringing during turn-off by controlling minority carrier lifetime and tail current decay. Its trr of 20 ns (at IF = 8 A, dI/dt = 500 A/µs, VR = 390 V, TJ = +25°C) and IRM of 6.9 A enable low-loss commutation with MOSFETs in interleaved or single-phase CCM PFC stages.

Designed for high-efficiency AC-DC front-ends, it operates up to +150°C junction temperature and features a low RθJL of 2 °C/W (measured from cathode tab), enabling direct heatsink mounting without thermal interface material in space-constrained industrial and automotive power supplies.

Key Specifications

Pinout & Package

Package: TO220AC - Molded plastic case with matte tin-plated copper leadframe; UL 94V-0 rated; 1.75 g mass; cathode tab serves as thermal and electrical connection point.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultra-fast recovery diode applications.

Compared with STTH8R06D and MUR860E, the DSR8A600 offers superior EMI performance due to soft recovery and lowest Qrr, while its AEC-Q101 rating and 20 ns trr make it uniquely suitable for automotive and high-density telecom PFC designs where thermal and electromagnetic constraints are most stringent.

Availability

DSR8A600 is available at Aetrix Electronics and suitable for server power supplies, automotive on-board chargers, industrial motor drive auxiliary supplies, and telecom rectifier modules requiring stable component supply across multi-year production cycles.

Supply support for DSR8A600 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 North America.

The DIODESTAR™ product line delivers high-performance rectifiers engineered specifically for demanding power conversion applications including PFC, UPS, and industrial switching power supplies, emphasizing soft recovery, low Qrr, and automotive reliability.

FAQ

What is the maximum allowable junction temperature for continuous operation?

The DSR8A600 has a maximum operating junction temperature of +150°C, validated per AEC-Q101 test conditions. Continuous operation at this temperature requires maintaining case temperature ≤+101°C per the IO rating curve, with thermal design ensuring RθJA does not exceed 62 °C/W in free-air or RθJL ≤2 °C/W when mounted to a heatsink.

How does the dual-cathode configuration improve PFC circuit performance?

The TO220AC package provides two cathode leads (pins 2 and 3) plus the metal tab, enabling separation of high-current return path (tab) from low-noise sensing or gate-drive return (pin 2 or 3). This reduces ground bounce and improves stability in high-dI/dt PFC controllers like the UCC28070 or ICE3PCS01.

Is the DSR8A600 suitable for use in discontinuous conduction mode (DCM) PFC?

While optimized for CCM operation, the DSR8A600 remains functional in DCM PFC due to its 20 ns trr and soft recovery. However, its low Qrr and VF advantages are less impactful in DCM, where diode conduction time is shorter and recovery losses are inherently lower than in CCM topologies.

Does the device require snubber circuitry in typical PFC implementations?

Snubbers are generally unnecessary with the DSR8A600 due to its soft recovery characteristic, which limits voltage overshoot and ringing. In well-layout PCBs with minimized loop inductance, measured overshoot remains <15% above VR, eliminating need for RC snubbers and associated power loss.