Diodes Incorporated FR602-T

Overview

FR602-T from Diodes Incorporated is a 100 V, 6.0 A fast recovery axial-lead rectifier diode in R-6 package, featuring 150 ns reverse recovery time, 1.3 V forward voltage at 6.0 A DC, and 300 A surge capability - used in AC/DC input stage rectification for industrial power supplies and UPS systems.

For engineers reviewing the FR602-T datasheet, FR602-T pinout, FR602-T application, or FR602-T equivalent, key selection criteria include peak repetitive reverse voltage (100 V), average forward current rating (6.0 A @ 75°C), low Trr (150 ns), VF consistency under load, and axial-lead mechanical compatibility with through-hole PCB layouts.

Technical Context

This device operates as a unidirectional silicon PN junction rectifier optimized for high-efficiency switching-mode power conversion. Its fast recovery behavior (Trr = 150 ns) minimizes switching losses during commutation, while the low VF (1.3 V @ 6.0 A) reduces conduction loss in continuous conduction mode.

The R-6 molded plastic case supports UL 94V-0 flammability compliance and enables reliable thermal dissipation via axial leads. Rated for operation from –65°C to +175°C junction temperature, it sustains full 6.0 A average forward current only when lead length is 9.5 mm and ambient temperature remains ≤75°C.

Key Specifications

Pinout & Package

R-6 molded plastic package with axial leads; cathode identified by color band; lead diameter 0.8–0.9 mm; overall length 25.4 mm max; body diameter 8.6–9.1 mm; weight ≈1.7 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with PR6002, FR602-T offers identical electrical specs but higher thermal resistance and legacy status; versus STTH6R010D, it trades 30 ns slower recovery and 50 mV higher VF for axial-lead compatibility and no heatsink requirement.

Availability

FR602-T is available at Aetrix Electronics and suitable for industrial AC/DC power supplies, uninterruptible power systems, motor drive front-ends, and welding equipment requiring stable component supply and long-term obsolescence management.

Supply support for FR602-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, manufacturing, and sales operations across Asia, Europe, and North America.

The FR60x series belongs to Diodes' general-purpose fast recovery rectifier product line, engineered for cost-sensitive, high-volume AC/DC conversion applications where reliability, thermal robustness, and axial-lead compatibility are prioritized.

FAQ

What is the maximum allowable ambient temperature for continuous 6.0 A operation?

FR602-T sustains 6.0 A average forward current only when ambient temperature is ≤75°C and lead length is 9.5 mm. At higher ambient temperatures, derating is required per Figure 1 in DS26004 - e.g., 4.5 A at 100°C ambient. Thermal design must account for PCB copper area and airflow.

Is FR602-T suitable for high-frequency PFC circuits operating above 100 kHz?

No - its 150 ns reverse recovery time makes it appropriate for 20–100 kHz applications, but not for >100 kHz boost PFC where ultrafast diodes (Trr < 50 ns) or SiC Schottkys are preferred. Use PR6002 or STTH6R010D for marginal improvement, but consider SiC alternatives for true high-frequency operation.

Does FR602-T have a specified junction-to-ambient thermal resistance (RθJA)?

No - RθJA is not specified in DS26004 because thermal performance depends heavily on lead length and PCB copper area. The datasheet provides derating curves based on 9.5 mm lead length; for accurate thermal modeling, use the measured VF vs. temperature coefficient (–1.8 mV/°C) and empirical board-level testing.

Can FR602-T replace FR601 or FR603 in an existing design?

Yes - FR602-T is pin-compatible and mechanically identical to other FR60x devices. Substitution requires verifying that 100 V VRRM meets system peak reverse voltage requirements; FR601 (50 V) is insufficient for 100 V designs, while FR603 (200 V) may increase cost and slightly raise VF due to higher doping gradients.