SMD-i055 Planar Inductors

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SMD inductors in our proprietary package i055 (USA PAT. 7,129,809) are designed to be used in high density and high reliability DC-DC converters with up to 30 ADC rated output. Typical applications are telecom, military, and aerospace systems where high efficiency, low profile and high repeatability are paramount. In addition to the tough electrical specifications these inductors have small footprints and very low profiles, from 0.300" to 0.420". They can operate without any air flow for cooling and may be attached to a substrate/heatsink with controlled temperature. Because of the unique SMD header/custom core combination, there is a direct thermal contact between bottom of ferrite core and heat dissipating substrate. The header also provides stable and precise co-planarity of terminals on both sides of the package. i055 inductors can be customized for different inductance / current combinations. Both single and multi-winding inductors are available. As an example, PQC1292, a 5 uH, 20A average (24A peak) inductor is shown below.

Contact our Application Department for more information and customization.


  1. Dimensions are in inches
  2. Drawing not to scale, not all details are shown
  3. Dimension tolerance +/- 2% unless noted

PQC1292 Specification

1. Application:

Differential Mode Inductor

2. Operating ambnient range (full load):

-55 deg, C to +85° C

3. Inductance:

5 uH +/- 10%

4. Rated Current:

20A average (24A Peak)

5. Max, Temp. Rise, +85 deg, C heatsink:


6. Minimum Isolation Voltage Winding-Core:



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