© 2007 Cooper Bussmann

St. Louis , MO 63178

www.cooperbussmann.com

1207

BU-SB07326

Page 7 of 7

Data Sheet 4311

This bulletin is intended to present product design solutions and technical information that will help the end user with design applications. Cooper Bussmann reserves the right, without notice,

to change design or construction of any products and to discontinue or limit distribution of any products. Cooper Bussmann also reserves the right to change or update, without notice, any

technical information contained in this bulletin. Once a product has been selected, it should be tested by the user in all possible applications.

Life Support Policy: Cooper Bussmann does not authorize the use of any of its products for use in life support devices or systems without the express written approval of an officer of the

Company. Life support systems are devices which support or sustain life, and whose failure to perform, when properly used in accordance with instructions for use provided in the labeling,

can be reasonably expected to result in significant injury to the user.

North America

Cooper Bussmann

1225 Broken Sound Parkway NW

Suite F

Boca Raton, FL 33487-3533

Tel: 1-561-998-4100

Fax: 1-561-241-6640

Toll Free: 1-888-414-2645

Cooper Bussmann

P.O. Box 14460

St. Louis, MO 63178-4460

Tel: 1-636-394-2877

Fax: 1-636-527-1607

Europe

Cooper Bussmann

Cooper (UK) Limited

Burton-on-the-Wolds

Leicestershire • LE12 5TH UK

Tel: +44 (0) 1509 882 737

Fax: +44 (0) 1509 882 786

Cooper Bussmann

Avda. Santa Eulalia, 290

08223

Terrassa, (Barcelona), Spain

Tel: +34 937 362 812

+34 937 362 813

Fax: +34 937 362 719

Asia Pacific

Cooper Bussmann

1 Jalan Kilang Timor

#06-01 Pacific Tech Centre

Singapore 159303

Tel: +65 278 6151

Fax: +65 270 4160

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% of Isat

OCL vs Isat DRQ74

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% of Isat

OCL vs Isat DRQ125

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% of Isat

OCL vs Isat DRQ127

Irms DERATING WITH CORE LOSS

% of Applied Volt-µSecond

Inductance Characteristics

Core Loss