EL SEGUNDO, CA, January 2002 - International Rectifier, IR® (NYSE: IRF) today introduced a new series of 320A and 400A standard-recovery, stud-mount rectifiers in the DO-9 package. Rectifier diodes are used to convert raw alternating current (AC) mains electricity into direct current (DC) power, the first step in the power conversion process. The new devices expand IR's current line of DO-9 rectifiers with ratings from 50V to 3200V and 300A to 400A.

The new devices are made for high-voltage, high-current industrial applications, such as welding, battery chargers, power supplies and light-duty traction applications. The term traction refers to motorized equipment such as golf carts and forklift trucks.

Dr. Francesco Vallone, International Rectifier Product Marketing Manager said, "Stud-mount rectifiers are the 'workhorse' of the electronic industry. These new rectifiers are made with the latest IR manufacturing techniques to enhance performance while remaining cost-effective."

Technical Highlights

The 240U060D, 240U080D, 240U100D and 240U120D (320A) rectifiers and the 400U080D, 400U120D, 400U160D (400A) rectifiers are manufactured with a new process that combines brazed-die construction with the reliability and ruggedness of compressed assembly. The new devices have outstanding power cycling performance and the ability to maintain stable forward-voltage characteristics throughout component lifetime.

Proper assembly techniques are highly recommended to ensure optimum performance of these devices, including the use of thermal compound between the heatsink and the device package. However, the new rectifiers are less sensitive to excessive mounting torque than previous devices.

Reverse-polarity (anode-to-stud) versions are available, indicated by the character "R" in the part number. For example, 240U120D refers to a 240U-series, standard-recovery, normal polarity (cathode-to-stud), 1200V, diffused diode, while a 240UR120D refers to the same device with reverse polarity.

Pricing and Availability

The new 320A and 400A stud-mount rectifiers are available immediately. Pricing is US $12.80 each for the 320A versions and US $16.20 each for the 400A devices in 100-unit quantities.

High Resolution JPEGs are available in the Press Room.