Notes from Tables

1. Temperature of the component (ambient plus

temperature rise) must be within specified

operating temperature range.

2. The rated current as listed is either the saturation

current or the heating current depending on which

value is lower.

3. The saturation current is the current which

causes the inductance to drop to 75% of its initial

inductance at zero bias. This current is determined

by placing the component at room ambient (25°C),

and applying a short duration pulse current (to

eliminate self-heating effects) to the component.

4. The heating current is the DC current, which

causes the temperature of the part to increase

by approximately 40°C. This current is determined

by extending the terminals of the component with

30mm length 28 gauge buss wires and applying

the current to the device for 30 minutes. The

temperature is measured by placing the thermo-

couple between the winding and the shield.

5. In high volt*time applications, additional heating in

the component can occur due to core losses in the

inductor which may necessitate derating the current

in order to limit the temperature rise of the compo-

nent. In order to determine the approximate total

loss (or temperature rise) for a given application,

both copper losses and core losses should be

taken into account.

SMT POWER INDUCTORS

Shielded Drum Core - PL89XX Series

www.pulseeng.com

M117.B (4/06)

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0%

20%

40%

60%

80%

100%

120%

0.0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

Normalized Isat

Inductance vs Current Characteristics