Visit us on the Web at www.cooperET.com

3601 Quantum Boulevard Boynton Beach, Florida 33426-8638

Tel: +1-561-752-5000 Toll Free: +1-888-414-2645 Fax: +1-561-742-1178

This bulletin is intended to present product design solutions and technical information that will help the end user with design applications. Cooper

Electronic Technologies reserves the right, without notice, to change design or construction of any products and to discontinue or limit distribution of

any products. Cooper Electronic Technologies 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.

PM-4314 1/04

© Cooper Electronic

Technologies 2004

• INDUCTANCE VS. CURRENT:

Inductance will fall off as DC Current is increased.

(See Inductance vs. Current graph).

• INDUCTANCE VS. FREQUENCY:

Inductance roll-off versus Frequency approximates 3% at

1 megaHertz.

• FREQUENCY RESPONSE:

Wide-band frequency response to 1 megaHertz.

• CURRENT LIMITATION:

The maximum allowable currents are defined by the internal

“hot-spot” temperatures which are limited to 130°C, including

ambient.

-35

-15

+5

+25

+45

+65

+85

+105

+125

INDUCTANCE VS. TEMPERATURE

Temperature in Degrees C.

+8

+6

+4

+2

+0

-2

-4

-6

-8

-10

-12

-14

ECONO-PAC

OCTA-PAC

INDUCTANCE VS. CURRENT

Per Unit Full Load Current

100

90

80

70

60

50

40

30

20

10

0

0.00

0.25

0.50

0.75

1.00

1.25

1.50

1.75

2.00

2.25

2.50

ECONO-PAC

OCTA-PAC

TEMPERATURE RISE VS. RATED CURRENT

Max. Ambient plus Rise = 125

°C

Per Unit Full Load Current

140

120

100

80

60

40

20

0

0.00

0.25

0.50

0.75

1.00

1.25

1.50

1.75

2.00

2.25

2.50

ECONO-PAC & OCTA-PAC

Performance Characteristics

®

Power Inductors and Transformers

020

406080

100

120

140

160

180

200

0

10

20

30

40

50

60

70

80

90

100

% of Isat

1000

800

600

500

400

300

200

100

80

60

50

40

30

20

10

% of Applied Volt-

µ-Second Rating

99

98

97

96

95

94

92

90

80

70

60

50

40

20

0