5300-765 Commercial electric thermostat 175-500F, 60" Capillary, 3/16" X 11-5/8" Nickel Bulb, direct acting (switch contacts open on temperature rise). Factory Model KX-257. The 5300-700 Series controls were s

Commercial electric thermostat 175-500F, 60" Capillary, 3/16" X 11-5/8" Nickel Bulb, direct acting (switch contacts open on temperature rise). Factory Model KX-257. The 5300-700 Series controls were specifically designed for pilot-duty (low voltage) applications. They are unique in that they utilize special cross-wire contacts. These contacts form a plus (+) sign configuration when they are made. Contacts are rated for 50 VA PD. These pilot-duty controls are designed to replace the extensive number of pilot-duty models used on commercial equipment.