Editor Contact Information
Kory Schroeder
Product Engineering Manager
Stackpole Electronics Inc.

New sizes offer more options to the power electronics designer...


RALEIGH, NC (June 11, 2007) – Stackpole Electronics, Inc. announces the addition of 30W and 50W offerings to their TR series of TO-220 style power film resistors. The TR series was previously offered in 20W and 35W configurations. This style of resistor is normally mounted along with various other power IC’s to a heat sink maintained at 25C. It is this technique that allows these relatively small size parts to dissipate such large amounts of power. The TO-220 package is a configuration that many power electronics engineers are very familiar and comfortable with.

The TR series is available in resistance values from 50 milliohms to 10K ohms, in tolerances as low as 0.5% and TCR’s as low as 50 ppm. It is a low inductance part with an operating voltage of 350 volts and is completely RoHS compliant. The TR series is ideal for a variety of power applications including high speed switching power supplies, snubbers, load resistors, pulsed applications, UPS systems, voltage regulators, RF power amplifiers, and industrial machinery control.

Kory Schroeder, Stackpole Product Engineering Manager stated, “Many power electronics designers incorporate a heat sink in their design to minimize the space needed and to protect their power IC’s. It makes sense to use that heat sink to downsize the resistor as well. Otherwise it would take a relatively large and bulky resistor to dissipate 20 to 50 watts of power in free air.”

Packaging for the TR series can be either tube or bulk pack, in 1000 pcs increments. Unit pricing is typically $1.20 to $1.50, but is value, tolerance and volume dependent. Lead time for this product is stock to 8 weeks.

For more information about Stackpole products, contact Stackpole Electronics Inc. at 2700 Wycliff Road, Suite 410, Raleigh, N.C. 27607; phone 919-850-9500; fax 919-850-9504; email marketing@seielect.com; or visit the Web site at www.seielect.com.

Stackpole Electronics Inc. is a leading global manufacturer of resistors supplying to the world’s largest OEMs, contract manufacturers and distributors. Headquartered in Raleigh, N.C., the privately held company began manufacturing in 1928 as part of Stackpole Carbon Company in St. Mary’s, Pennsylvania. Now affiliated with Akahane Electronics, Stackpole has manufacturing facilities in Japan, Taiwan, China and Mexico; warehousing facilities in El Paso, Guadalajara, Hong Kong and Japan; and sales offices in Tokyo, Hong Kong and Taiwan.