The Gefran F053994 is a single-phase solid state power controller from the GTF series, model GTF-40-480-0-0-0-0 1-P-M.
The Gefran F053994 is a single-phase solid state power controller from the GTF series, model GTF-40-480-0-0-0-0 1-P-M, designed for industrial heating applications with a 40 A current rating and 480 V AC voltage capacity.