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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