[Object] To provide a powder core that undergoes less changes in magnetic properties even when used in a high temperature environment and that has excellent mechanical properties. A powder core 1 includes a compact 1B including a soft magnetic powder, and an outer coating of the compact 1B, in which the outer coating contains polyethersulfone. A method for manufacturing the powder core 1, an electric or electronic component including the powder core 1, and an electric or electronic device having the electric or electronic component mounted therein are also provided.
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