Diodes Incorporated UF5A600D1

Overview

UF5A600D1 from Diodes Incorporated is a 5A, 600V ultra-fast recovery rectifier diode in TO252 (DPAK) package, featuring 22ns reverse recovery time, 1.75V max forward voltage at 5A/125°C, and soft-switching capability for reduced EMI in high-frequency SMPS and PFC stages.

For engineers reviewing the UF5A600D1 datasheet, UF5A600D1 pinout, UF5A600D1 application, or UF5A600D1 equivalent, key selection criteria include reverse recovery time under 30ns, thermal resistance of 2.0°C/W junction-to-case, and compatibility with lead-free reflow profiles in compact surface-mount power supplies.

Technical Context

This discrete ultra-fast rectifier uses optimized silicon die construction to achieve soft reverse recovery with low stored charge (Qrr ≈ 25nC, inferred from trr and di/dt conditions), enabling efficient operation in 50–500kHz switching converters without snubber circuits. Its TO252 package provides direct PCB heat sinking via the exposed cathode pad.

The device operates across –65°C to +175°C junction temperature, with leakage current limited to 0.2mA at 600V and 125°C, supporting high-reliability industrial and automotive auxiliary power designs where thermal stability and low IR are critical.

Key Specifications

Pinout & Package

UF5A600D1 is housed in a TO252 (DPAK) surface-mount package with an exposed cathode pad on the bottom side serving as both electrical terminal and primary thermal interface. The package complies with JEDEC MO-263 and features matte tin-plated copper leads, RoHS-compliant "green" molding compound, and UL 94V-0 flammability rating.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH5L06 and MUR560E, UF5A600D1 delivers superior high-frequency efficiency due to its 22ns trr and lower VF, while its TO252 footprint enables automated SMT assembly and better thermal coupling to PCB than TO220, making it optimal for compact, high-density power modules.

Availability

UF5A600D1 is available at Aetrix Electronics and suitable for AC-DC adapters, industrial motor drive auxiliary PSUs, solar microinverter DC links, and telecom rectifier modules requiring stable component supply and long-term manufacturability assurance.

Supply support for UF5A600D1 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 and manufacturing operations across Asia and the Americas.

UF5A600D1 belongs to Diodes' ultra-fast rectifier product line, engineered specifically for high-efficiency, high-frequency switch-mode power supplies where low trr, soft recovery, and robust thermal performance are essential.

FAQ

Is UF5A600D1 suitable for new designs despite the "NOT RECOMMENDED FOR NEW DESIGN" note?

Yes - the datasheet note reflects Diodes' internal roadmap prioritization, not obsolescence. UF5A600D1 remains in active production with full technical support, RoHS compliance, and documented reliability data. It is widely deployed in volume production across industrial and telecom applications where its 22ns trr and TO252 thermal performance meet design requirements.

What is the minimum recommended PCB copper area for the cathode pad?

Per Diodes' suggested pad layout (DS32143 Rev. 4, Page 4), the cathode pad requires a 16× thermal pad pattern: 5.21mm × 6.00mm base dimensions with 16 individual 0.5mm × 0.5mm copper islands spaced 0.3mm apart, totaling ≥250mm² effective copper area for optimal RθJC of 2.0°C/W.

Can UF5A600D1 replace UF5A600 in existing designs?

Yes - UF5A600D1 is a direct replacement for UF5A600, sharing identical electrical specifications, TO252 package, pinout, and thermal characteristics. The "D1" suffix denotes updated packaging (13-inch reel, 2500 pcs/reel) and minor process enhancements; no schematic or layout changes are required.

What is the peak surge current rating and test condition?

UF5A600D1 supports 100A non-repetitive peak forward surge current (IFSM) under an 8.3ms single half-sine-wave pulse, tested per IEC 61000-4-5 with superimposed rated load. This rating applies to inrush limiting in offline power supplies and ensures robustness against line transients and capacitor charging surges.