Diodes Incorporated FR305-T

Overview

FR305-T from Diodes Incorporated is a 600 V, 3.0 A fast recovery rectifier diode in DO-201AD axial package, featuring 150 ns reverse recovery time (Trr), 1.3 V forward voltage at 3.0 A, and 10 µA maximum reverse leakage at rated voltage - used in AC/DC front-end rectification for industrial power supplies and UPS systems.

For engineers reviewing the FR305-T datasheet, FR305-T pinout, FR305-T application, or FR305-T equivalent, key selection criteria include Trr < 200 ns, VRRM ≥ 600 V, I(AV) ≥ 3.0 A, VF ≤ 1.3 V at rated current, and DO-201AD mechanical compatibility with through-hole PCB layouts.

Technical Context

This device operates as a unidirectional silicon junction rectifier optimized for high-frequency switching applications where low reverse recovery charge (Qrr) minimizes switching losses. Its 150 ns Trr is measured under standardized conditions (IF = 0.5 A, IR = 1.0 A, IRR = 0.25 A), enabling use in 20–100 kHz SMPS input stages.

The DO-201AD package supports 3.0 A average forward current at 75°C ambient with 9.5 mm lead length, and its 70 pF junction capacitance at 4 V reverse bias contributes to predictable EMI behavior in bridge configurations.

Key Specifications

Pinout & Package

DO-201AD molded plastic package with axial leads; cathode identified by color band; UL 94V-0 rated; weight ≈ 1.1 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 PR3005G and STTH3L06, FR305-T offers proven DO-201AD through-hole compatibility and cost-effective performance for 20–60 kHz industrial rectification, while trading 30 ns Trr and 0.05 V VF for simpler assembly and lower BOM cost.

Availability

FR305-T is available at Aetrix Electronics and suitable for industrial SMPS, UPS systems, solar microinverters, and motor drive auxiliary power supplies requiring stable component supply across multi-year production cycles.

Supply support for FR305-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, specializing in high-reliability power management and signal integrity solutions.

The FR30x series belongs to Diodes' fast recovery rectifier product line, engineered for high-efficiency AC/DC conversion in industrial, computing, and renewable energy applications where low Trr and robust surge capability are critical.

FAQ

What is the maximum junction temperature for FR305-T?

The FR305-T has a specified operating junction temperature range of -65°C to +175°C. Its absolute maximum TJ is 175°C, and thermal design must ensure this limit is not exceeded under worst-case conduction and surge conditions, especially when mounted with 9.5 mm lead length and no heatsink.

Is FR305-T RoHS compliant and halogen-free?

Yes, FR305-T meets RoHS Directive 2011/65/EU requirements and is halogen-free per IEC 61249-2-21. The DO-201AD package uses UL 94V-0 rated molding compound, and all plating meets JEDEC J-STD-609A Class 1 specifications for lead-free solderability.

Can FR305-T replace FR304 or FR306 in existing designs?

FR305-T is not a direct replacement for FR304 (400 V VRRM) or FR306 (800 V VRRM) due to voltage rating mismatch. Substitution requires verification that system peak reverse voltage stays within ±10% of 600 V and that thermal margins remain acceptable at the new VF and Trr values.

Does FR305-T require a heatsink in standard operation?

No heatsink is required for FR305-T at 3.0 A average current and 75°C ambient when using 9.5 mm lead length per JEDEC test conditions. Thermal performance depends on PCB copper area, airflow, and duty cycle; heatsinking becomes necessary above 2.5 A in sealed enclosures above 60°C ambient.