T-O-D 60T21 Thermal Disc Limit Switch
Product overview
Type: Thermal disc limit switch (bimetallic)
Model: T-O-D 60T21
Function: Open or close electrical circuit in response to temperature; provides over-temperature protection and control for HVAC equipment.
Key specifications
Temperature setpoint: 60°C (nominal)
Differential: Manufacturer-specified hysteresis (typical for disc-type limits; check unit label for exact value)
Contact configuration: SPST or SPDT (verify label)
Voltage/current ratings: Match OEM equipment requirements — consult unit label or equipment manual for maximum switching voltage and current
Terminations: Quick-connect or screw terminals depending on version
Mounting: Panel or chassis mount with threaded bushing or bracket (model-dependent)
Materials: Bimetal thermal disc element with metal housing and insulating terminal block
Applications
Furnace and boiler primary or secondary high-limit protection
Packaged rooftop units and air handlers
Water heaters and steam systems
Industrial temperature monitoring and safety cutouts
Installation notes
Mount in the location specified by the equipment manufacturer (typically near the heat source)
Ensure good thermal contact with the surface if required; use thermal paste if recommended
Observe correct orientation and secure mounting to avoid vibration-related failures
Wire according to equipment wiring diagram; de-energize power before installation
Replace like-for-like: match setpoint, mounting style, and electrical ratings
Maintenance and testing
Periodically inspect for corrosion, loose terminals, or physical damage
Test operation by performing controlled heat cycling per equipment service procedures
Replace if contacts are pitted, if switch fails to open/close at specified temperature, or if mechanical deformation is present
Ordering information
When ordering replacement, provide: equipment model, existing part number, setpoint (60°C), mounting type, and terminal style
OEM-equivalent replacements recommended for guaranteed fit and function
Safety
Shorten.
T-O-D 60T21 Thermal Disc Limit Switch
Product overview
Type: Thermal disc limit switch (bimetallic)
Model: T-O-D 60T21
Function: Open or close electrical circuit in response to temperature; provides over-temperature protection and control for HVAC equipment.
Key specifications
Temperature setpoint: 60°C (nominal)
Differential: Manufacturer-specified hysteresis (typical for disc-type limits; check unit label for exact value)
Contact configuration: SPST or SPDT (verify label)
Voltage/current ratings: Match OEM equipment requirements — consult unit label or equipment manual for maximum switching voltage and current
Terminations: Quick-connect or screw terminals depending on version
Mounting: Panel or chassis mount with threaded bushing or bracket (model-dependent)
Materials: Bimetal thermal disc element with metal housing and insulating terminal block
Applications
Furnace and boiler primary or secondary high-limit protection
Packaged rooftop units and air handlers
Water heaters and steam systems
Industrial temperature monitoring and safety cutouts
Installation notes
Mount in the location specified by the equipment manufacturer (typically near the heat source)
Ensure good thermal contact with the surface if required; use thermal paste if recommended
Observe correct orientation and secure mounting to avoid vibration-related failures
Wire according to equipment wiring diagram; de-energize power before installation
Replace like-for-like: match setpoint, mounting style, and electrical ratings
Maintenance and testing
Periodically inspect for corrosion, loose terminals, or physical damage
Test operation by performing controlled heat cycling per equipment service procedures
Replace if contacts are pitted, if switch fails to open/close at specified temperature, or if mechanical deformation is present
Ordering information
When ordering replacement, provide: equipment model, existing part number, setpoint (60°C), mounting type, and terminal style
OEM-equivalent replacements recommended for guaranteed fit and function
Safety
Shorten.