pioneer gm-6100f

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The PA2027 is a control IC used for protection. It takes the signals from the various protection circuits and controls muting and the output of the UPC494. These rarely fail and are not stressed when the power supply fails.

Arrownac.com has the FKV550N. If Arrow won't ship to your location, Mouser has the IRFIZ48 which should serve as a suitable replacement.

The Z44s would work but you'd need to add shoulder washers and insulators.
 
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