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

Ferrite bobbins offer solutions for many demanding applications...


RALEIGH, NC (December 5, 2006) – Stackpole Electronics, Inc. introduces two new series of ferrite bobbin inductors. Designated the DRGH and DRGR Series, they are available in a wide range of inductance values with tight tolerance and remarkably low DC Resistance. The parts provide solutions to many design challenges where low cost and high power performance are important.

The precise control of core materials creates the exceptionally large range of values and contributes to the ability of the DRGH and DRGR to achieve tolerances as tight as 5%. Both series are DIP Power Inductors, but the DRGR features a ferrite sleeve to effectively shield nearby components from the EMI.

The addition of this type of leaded power inductor fills a significant void in the Stackpole power inductor offering. Bobbin style inductors are a popular choice for applications requiring both noise attenuation and protection of sensitive components. The single layer of windings generates very low parasitic capacitance, making both series efficient power chokes. The DRGH and DRGR are typically larger than many SMD power chokes, which creates two distinct advantages. First of all, the large size enables the DRGH and DRGR to handle large currents with low saturation losses, a key requirement in today’s design environment. Secondly, the relatively large size and through hole configuration help the DRGH and DRGR to efficiently transfer heat away from the part, minimizing susceptibility to overheating which is a common cause of power inductor failures.

The versatility of these products makes them suitable for a wide array of applications. The noise attenuation and low saturation losses make them ideal for personal computers and high power / high frequency power supplies. Furthermore, the variety of sizes available and robust surge capability makes them ideal in a number of battery-supplied devices, such as electronic testing equipment and many other higher power portable electronic devices.

The DRGH Series is a non-shielded power choke available in values from 10-47,000µH, is rated for current up to 5.3A, and offers DC Resistance as low as 50mO. The DRGR is magnetically shielded and available in values from 10-10,000µH, with current ratings up to 3.9A. Both series are available in diameters between 6mm and 10mm, and offer significant cost and space savings over comparable toroid inductors. For both series, the larger part sizes have four leads instead of two to enhance mechanical integrity. Pricing for the DRGH is typically $XXX, DRGR pricing is around $XXX. Lead times for both series are 8-10 weeks, with samples available in 3-4 weeks.

For more information about Stackpole products, contact Stackpole Electronics Inc. at 3261 Atlantic Avenue, Raleigh, N.C. 27604; 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.