Diodes Incorporated FR601-T

Overview

FR601-T from Diodes Incorporated is a 6.0A fast recovery rectifier diode in R-6 axial package, rated for 50V maximum recurrent peak reverse voltage (VRRM), 1.3V forward voltage drop at 6.0A DC, and 150ns reverse recovery time (Trr); used in AC/DC input stage of offline switch-mode power supplies.

For engineers reviewing the FR601-T datasheet, FR601-T pinout, FR601-T application, or FR601-T equivalent, key selection criteria include VRRM margin vs. line surge, Trr impact on EMI in high-frequency converters, thermal derating above 75°C ambient, and axial lead compatibility with through-hole PCB assembly.

Technical Context

This device operates as a unidirectional silicon PN junction rectifier optimized for medium-power switching applications. Its fast recovery (150ns) reduces switching losses and associated EMI compared to standard rectifiers, while the 6.0A average forward current rating supports continuous conduction mode operation in 50–100W SMPS front-ends.

The R-6 package provides mechanical robustness and thermal path via axial leads, with UL 94V-0 flammability compliance. Junction temperature range spans –65°C to +175°C, enabling use in industrial and automotive under-hood environments where thermal cycling and ambient extremes are present.

Key Specifications

Pinout & Package

R-6 molded plastic axial-leaded package per JEDEC DO-41 variant; cathode indicated by color band; UL 94V-0 compliant; 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 FR601-T, PR6001-T delivers measurable improvement in switching loss and thermal performance, while 1N5401 trades recovery speed for marginally lower conduction loss at low frequency-making FR601-T the balanced choice for cost-sensitive 50–150 kHz industrial SMPS.

Availability

FR601-T is available at Aetrix Electronics and suitable for AC/DC adapters, industrial DC power supplies, automotive battery chargers, and UPS inverter stages requiring stable component supply and long-term manufacturability.

Supply support for FR601-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 Americas.

The FR600 series belongs to Diodes' general-purpose fast recovery rectifier product line, engineered for reliable, cost-effective AC/DC conversion in industrial, computing, and consumer power applications.

FAQ

What is the maximum allowable junction temperature for FR601-T?

The absolute maximum junction temperature (TJ) is +175°C, verified per DS26004 Rev. 5. Derating begins at TA = 75°C, where I(AV) drops linearly to zero at 175°C case temperature. Thermal resistance (RθJA) is not specified in the datasheet, but typical R-6 package RθJC ≈ 10°C/W enables 6A operation with minimal heatsinking in free-air conditions.

Is FR601-T suitable for use in a full-wave bridge configuration?

Yes, FR601-T is commonly used as one leg in discrete full-wave bridge rectifiers. Its 300A IFSM rating supports surge currents typical of bridge operation, and its 150ns Trr prevents cross-conduction losses during commutation. Ensure matched diodes and symmetric PCB layout to balance thermal stress across all four legs.

Does FR601-T have lead-free and RoHS-compliant construction?

Yes, FR601-T is RoHS-compliant and lead-free per Diodes Incorporated's product change notice PCN-2019-001. The terminals are matte tin-plated copper, and the R-6 epoxy meets JEDEC J-STD-020 moisture sensitivity level MSL-1, eliminating bake requirements before soldering.

How does FR601-T compare to Schottky rectifiers in the same current class?

Unlike Schottky diodes, FR601-T uses a silicon PN junction, enabling 50V VRRM with no reverse leakage increase at high temperature. While Schottkys offer lower VF (~0.5V), they exhibit exponential IR rise above 125°C and lack the 300A surge rating. FR601-T is preferred where reliability under thermal stress and surge immunity outweigh ultra-low VF needs.