market 1977-01

A new series of NPN power tran- sistors with ratings to 1000 volts and 50 watts is now available from the Semiconductor Division of International Rectifier. Designated IR721, the new tran- sistors are rated for a continuous collector current of 3 amps. Maxi- mum de current gain for the devices is 60 at 150 milliamps and 5 volts. All the new units are glass passi- vated to provide stability at high junction temperatures and are made with triple-diffused process- ing for exeptionally high voltage with a wide safe operating area. The new units are especially well suited for applications in high- voltage de regulators, high-voltage switching power supplies and switching regulators. Packaging is a standard JEDEC TO-3 case.