White-Rodgers 3L05-1 Heating Snap Disc Limit Control

The White-Rodgers 3L05-1 Heating Snap Disc Limit Control is a reliable SPST, Open on Rise limit switch designed for heating control applications. This adjustable-set-point unit features Therm-O-Disc Style 74T11 construction and a flanged Airstream mount for secure installation in furnaces, air handlers, and other heating equipment.

Designed for 120/240 VAC operation, it provides robust protection with current ratings of 14 A at 120 V AC and 10 A at 240 V AC (full load), plus higher ratings for specific conditions (e.g., 72 A at 120 V / 60 A at 240 V for locked rotor). It also supports resistive loads up to 25 A at 120/240 V and includes 1/4 inch quick-connect terminals for easy wiring. With a temperature rating of 135–175°F and a 40°F differential, this limit control delivers precise, dependable protection with a 125 VA pilot-duty power rating. This combination makes it suitable for a wide range of residential and commercial heating systems while maintaining safety and reliability.

• SPST switch, Open on Rise
• Adjustable Set Point
• Therm-O-Disc Style 74T11 construction
• Flanged Airstream Mount for secure installation
• 1/4" Quick Connect Terminals
• Voltage rating: 120/240 VAC
• Temperature rating: 135–175°F; Differential: 40°F