F3.55A

50°C to 400°C [122°F to 752°F] bimetallic thermal overload relay block heater element. Calibrated to match a specific 3.55 Amp internal trip threshold profile to protect heavy three-phase industrial blower motors from burnout conditions. Installed within centralized magnetic motor starters, industrial fan ventilation control tracks, and factory furnace pump modules. Industry-standard direct replacements and cross-manufacturers include Allen-Bradley F3.55A, Square D (Schneider) thermal heaters, General Electric overload elements, and Westinghouse Type W components.