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![4P-6009 [VARYSTOR]](https://deshpower.com.bd/wp-content/uploads/2026/08/4P-6009-500x375.png "4P-6009")
4P-6009 [VARYSTOR]
Caterpillar 4P-6009 — VARISTOR
Part Number: 4P-6009
Part Name: Heat Sink Varistor / Surge Suppressor
Brand: Caterpillar (Cat)
Category: Generator electrical component
The 4P-6009 varistor works as a surge suppressor in the heat-sink assembly of the rotating/revolving rectifier group. It helps protect the generator’s electrical components from voltage surges.