Diodes Incorporated FR605-T

Overview

FR605-T from Diodes Incorporated is a 600V, 6.0A fast recovery axial-lead rectifier diode in R-6 package, featuring 150ns reverse recovery time, 1.3V max forward voltage at 6.0A DC, and 10μA max reverse current at 25°C - deployed in offline AC/DC power supplies, UPS inverters, and motor drive freewheeling paths.

For engineers reviewing the FR605-T datasheet, FR605-T pinout, FR605-T application, or FR605-T equivalent, key selection criteria include V_RRM = 600V, I_(AV) = 6.0A @ 75°C, T_rr = 150ns, low leakage (I_R = 10μA @ 25°C), and UL 94V-0 molded plastic case compliance.

Technical Context

This device operates as a unidirectional silicon junction rectifier with fast recovery characteristics optimized for high-frequency switching converters. Its 150ns T_rr enables reduced switching losses in 20–100kHz SMPS topologies, while the 6.0A average forward current rating supports continuous conduction mode operation with 9.5mm lead length derating.

The R-6 axial package provides mechanical robustness and thermal path via leads, supporting mounting in any orientation. Junction temperature range of –65°C to +175°C allows use in industrial and automotive under-hood auxiliary power stages where ambient exceeds 100°C.

Key Specifications

Pinout & Package

R-6 molded plastic package with axial leads; cathode identified by color band; UL 94V-0 rated; weight ≈1.7 g; mountable in any orientation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with FR605-T, PR6003-T delivers lower switching loss at high frequency but increases BOM cost, while FR605G maintains identical performance with enhanced environmental compliance - making FR605-T optimal for cost-sensitive legacy industrial designs.

Availability

FR605-T is available at Aetrix Electronics and suitable for industrial motor drives, uninterruptible power supplies, AC/DC adapters, and automotive auxiliary power systems requiring stable component supply and long-term lifecycle support.

Supply support for FR605-T 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 US.

The FR601–FR607 series targets cost-effective, high-reliability rectification in industrial and consumer power conversion, emphasizing fast recovery, thermal robustness, and UL-certified packaging.

FAQ

What is the maximum allowable lead temperature during soldering for FR605-T?

The FR605-T axial leads are rated for soldering at 260°C for up to 10 seconds per MIL-STD-202 Method 208. Exceeding this limit risks internal bond wire damage or delamination of the molded plastic body. Pre-tinning is not recommended; use temperature-controlled irons with clean tips and minimal dwell time.

Can FR605-T replace FR604-T in an existing 400VAC input design?

No - FR604-T has V_RRM = 400V, while FR605-T is rated for 600V. Substituting FR605-T is electrically safe but may increase forward voltage slightly due to process differences; however, replacing FR605-T with FR604-T in a 600V design violates voltage margin requirements and risks catastrophic failure during line surges.

Is FR605-T suitable for synchronous rectification topologies?

No - FR605-T is a passive PN-junction diode and cannot be actively controlled. Synchronous rectification requires MOSFETs with gate drive signals. While FR605-T may serve as a fallback in non-synchronous designs, it introduces fixed V_F loss and lacks controllability needed for adaptive dead-time management.

Does FR605-T have a specified junction-to-lead thermal resistance (R_θJL)?

No - Diodes Incorporated does not publish R_θJL for the R-6 package in DS26004. Thermal design must rely on the derating curve (Fig. 1), which specifies I_(AV) = 6.0A at T_A = 75°C with 9.5mm lead length. For board-level thermal modeling, assume R_θJA ≈ 35°C/W based on empirical R-6 measurements under standard JEDEC test conditions.