Diodes Incorporated FR805

Overview

FR805 from ON Semiconductor is a fast recovery rectifier diode in TO-220A package, rated for 600 V maximum recurrent peak reverse voltage, 8.0 A average forward current at TC = 100°C, and 150 ns reverse recovery time. It delivers low forward voltage drop (1.3 V @ 8.0 A), high surge capability (150 A, 8.3 ms), and operates from –65°C to +175°C - used in offline AC/DC power supplies and PFC stages.

For engineers reviewing the FR805 datasheet, FR805 pinout, FR805 application, or FR805 equivalent, key selection criteria include VRRM = 600 V, Trr = 150 ns, VF = 1.3 V @ 8.0 A, IFSM = 150 A, and thermal derating above 100°C case temperature in high-efficiency switching power converters.

Technical Context

This device is a single-junction, planar-passivated silicon fast recovery rectifier optimized for high-frequency switching operation. Its 150 ns reverse recovery time and 70 pF junction capacitance enable reduced switching losses in 50–100 kHz SMPS designs, while the 1.3 V forward voltage balances conduction loss and thermal management.

The TO-220A package provides direct heatsink mounting with case polarity defined as cathode (Pin 2) and anode (Pin 1), supporting high-reliability industrial power conversion where leakage must stay below 10 µA at 600 V DC blocking and 25°C ambient.

Key Specifications

Pinout & Package

Package: TO-220A molded plastic case with plated axial leads (solderable per MIL-STD-202, Method 208); case polarity marked - Pin 1 = Anode (+), Pin 2 = Cathode (–); case is electrically isolated and non-conductive.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH8R06D and ESAD86G, FR805 offers balanced trade-offs: mid-range Trr (150 ns) and VF (1.3 V), robust 150 A surge rating, and proven reliability in TO-220A across decades of industrial deployment - ideal for cost-sensitive, thermally demanding 50–100 kHz power supplies.

Availability

FR805 is available at Aetrix Electronics and suitable for industrial AC/DC power supplies, motor drive input rectification, uninterruptible power supplies (UPS), and LED driver bulk rectification requiring stable component supply and long-lifecycle support.

Supply support for FR805 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

ON Semiconductor is a global semiconductor supplier delivering energy-efficient, high-performance silicon solutions for automotive, industrial, cloud, and IoT applications.

The FR801–FR805 series belongs to ON Semiconductor's fast recovery rectifier product line, engineered for high-efficiency offline power conversion where low Trr, low VF, and rugged surge performance are critical.

FAQ

What is the thermal resistance junction-to-case (RθJC) for FR805?

The FR805 has a typical RθJC of 1.8°C/W, measured under standard TO-220A mounting conditions (bare copper heatsink, 0.5 N·m screw torque, no thermal interface material). This value enables calculation of junction temperature rise using TJ = TC + (Pd × RθJC), where Pd is total power dissipation from conduction and switching losses.

Can FR805 be used in a full-wave bridge configuration?

Yes - FR805 is a single-diode device and is commonly used as one leg in discrete full-wave bridge rectifiers. Four FR805 units can form a 600 V, 8 A bridge; ensure matched thermal mounting and equal current sharing via layout symmetry and shared heatsink to avoid thermal runaway.

Does FR805 have a built-in thermal protection feature?

No - FR805 is a passive silicon rectifier with no integrated thermal shutdown or sensing circuitry. System-level thermal protection must be implemented externally via thermistors, thermal fuses, or controller-based temperature monitoring on the heatsink or PCB near the device mounting location.

What is the maximum recommended lead temperature during soldering?

The maximum lead temperature for FR805 during hand soldering is 260°C for up to 10 seconds, per MIL-STD-202, Method 208. Reflow profiles must comply with JEDEC J-STD-020 moisture sensitivity level (MSL) 1 - no floor life limitation, but pre-bake at 125°C for 24 hours is advised if exposed to >60% RH for >72 hours.