Watlow PC91-F20B-1000 Solid State Power Controller

The Watlow PC91-F20B-1000 solid state power controller is a 90 A, 200–480 V AC three-zone single-phase SCR power controller designed for accurate electrical load management in thermal processing systems. Part of Watlow's Power Series, it supports 3-zone operation with both zero-cross and phase-angle firing and communicates via Modbus RTU for integration with industrial automation. Operating at 50/60 Hz and fan-cooled, it is suitable for industrial ovens, plastics processing equipment, heat treatment systems, process heaters, semiconductor manufacturing equipment, industrial furnaces, and OEM thermal control panels. Key specifications include UL, C-UL, and CE certifications, 7 mm mounting / panel mounting, SCCR of 200 kA, and built-in heater and control diagnostics with semiconductor fuse protection.