75 AMP Parallax Magnetek Thermal Protector Model 775 09526991
75 amp for the 775 model TU only.
Vintage camper repair parts.
A thermal protector is a component which opens an electrical circuit (i.e., interrupts the flow of currecnt) when it reaches a specified temperature. Resettable thermal protectors, such as these are used in RV power converters, re-connect the circuit when the unit cools down.