10H Linear Limit

10H Linear Limit


Technology: Safety limits and Controls

Product Category: Bi-metal

Application: HVAC

Brand: Therm-O-Disc


The 10H series temperature control was developed to sense hot spots along the length of electric baseboard heaters. The snap-action design provides high-speed contact separation resulting in excellent life cycle characteristics at electrical loads up to 25 amps at 277VAC. Typical applications include electric baseboard heaters and other applications where it is necessary to sense temperatures along a continuous length.

  • Function:
  • Max Calibration:
  • Max Electrical Amperage:
  • Capillary Auto Reset Or Manual Reset
  • 177°C / 350°F
  • 25
  • “Push–on” screwless mounting
  • Available with either 1/4 inch, 90 degree blade terminals or 6.5 inch lead wires
  • Capillary tube lengths from 24 inches to 144 inches
  • Manual reset available (M1 trip free construction)
  • Single pole, single throw

Agency Ratings

(consult catalog for details)

  • Catalog
    10H Linear Limit Product Specfications
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74T Adjustable Temperature Controls

74T Adjustable Temperature Controls


Technology: Safety limits and Controls

Product Category: Bi-metal

Application: Appliance, HVAC

Brand: Therm-O-Disc


The 74T line of temperature controls features adjustable fan or limit operation in a versatile disc design. The 74T allows adjustment of the operating temperature within an approximate thermal range. The snap-action of the temperature sensing bi-metal disc provides high-speed contact separation for exceptional life characteristics at electrical loads up to 25 amps at 240 VAC.

  • Function:
  • Max Calibration:
  • Max Electrical Amperage:
  • Adjustable Auto Reset
  • 121°C / 200°F
  • 25
  • Adjustable operating temperatures for maximum design or service flexibility
  • Welded construction for integrity of current-carrying components
  • Available with an exposed or enclosed bi-metal disc for either increased thermal response or protection from airborne contaminants
  • Airstream or surface mounting flanges are available

Agency Ratings

(consult catalog for details)

  • Catalog
    74T Adjustable Temperature Controls Product Specifications
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59T Adjustable Bi-metal Control

59T Adjustable Bi-metal Control


Technology: Safety limits and Controls

Product Category: Bi-metal

Application: Water Heating

Brand: Therm-O-Disc


The 59T series of adjustable, automatic reset thermostats is designed to meet the high electrical capacity requirements of electric water heaters. Its design uses a snap-action, temperature sensitive bi-metal disc to provide long, dependable control life at electric loads up to 30 amps at 250VAC. The 59T can be supplied in combination with our 66T manual reset limit as an industry standard electric water heater temperature control/limit.

  • Function:
  • Max Calibration:
  • Max Electrical Amperage:
  • Adjustable Auto Reset
  • 93°C / 200°F
  • 30
  • 10–32 tin plated terminal screws for electrical connections
  • 60°F adjustable range
  • Single pole, single throw or single pole, double throw, open on temperature rise construction
  • Welded construction used on all internal current carrying components for greater electrical integrity

Agency Ratings

(consult catalog for details)

  • Catalog
    59T, 66T Water Heater Controls Product Specifications
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75TF Snap-Action Bi-metal Control

75TF Snap-Action Bi-metal Control


Technology: Safety limits and Controls

Product Category: Bi-metal

Application: Appliance, HVAC

Brand: Therm-O-Disc


The 75TF line of temperature controls combines automatic reset and single operation in one unique switch design. Two independent switch mechanisms, in electric series, provide primary and secondary temperature sensing at electrical loads up to 25 amps at 240 VAC. The 75TF is a viable alternative in applications where space prohibits two separate sensing devices.

  • Function:
  • Max Calibration:
  • Max Electrical Amperage:
  • Auto Reset / One-Shot Combination
  • 149°C / 300 °F Auto And 177°C /350°F Fuse
  • 25
  • Primary and secondary temperature sensing in same location
  • Automatic reset SPST in series with the single operation SPST
  • Snap-action bi-metal disc for high-speed contact separation
  • Wide variety of terminal and mounting options for design flexibility
  • Welded construction for integrity of current-carrying components
  • Available with exposed or enclosed bimetal disc for either increased thermal response or protection from airborne contaminants

Agency Ratings

(consult catalog for details)

  • Catalog
    75TF Snap Action Temperature Controls Product Specifications
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12S, 14S, and 15S Sequencers

12S, 14S, and 15S Sequencers


Technology: Safety limits and Controls

Product Category: Bi-metal

Application: HVAC

Brand: Therm-O-Disc


Type 12S, 14S, and 15S series sequencers combine a solid state PTC (positive temperature coefficient) heater with bimetal disc actuated contacts to provide time-delayed electrical switching. The snap-action design provides high-speed contact separation resulting in excellent life cycle characteristics at electrical loads up to 30 amps at 240 VAC. The 12S is a single disc device (either one or two pole). The 14S uses two bi-metal discs to provide two independent timings. The 15S consists of one control mounted on a common baseplate. Typical applications include electric furnaces, gas unit heaters, and other applications where a time delay is required.

  • Function:
  • Max Calibration:
  • Max Electrical Amperage:
  • Time Delay Relay
  • 30
  • Available with a variety of terminals and baseplates
  • Single pole, single throw/ single pole, double throw/ double pole, single throw/three pole
  • Available with contacts normally open or normally closed
  • Quiet operation

Agency Ratings

(consult catalog for details)

  • Catalog
    12S, 14S and 15S Time Delay Relays Product Specifications
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30M Manual Reset Bi-metal Motor Protector

30M Manual Reset Bi-metal Motor Protector


Technology: Safety limits and Controls

Product Category: Bi-metal

Application: Appliance

Brand: Therm-O-Disc


The 30M manual reset motor protector from Therm–O–Disc® offers accurate and reliable protection against hazardous overheating in single phase/single voltage A/C motors. Provided in a compact, versatile, cost-effective design, the snap-action of the bi-metal disc provides high-speed contact separation resulting in excellent life cycle characteristics at electrical loads up to 50 amps locked rotor at 120VAC, and 37 amps locked rotor at 240VAC. The most common application is garbage disposals.

  • Function:
  • Max Calibration:
  • Max Electrical Amperage:
  • Manual Reset
  • 149°C / 300 °F
  • 50 (LRA)
  • Current and temperature responsive
  • M1 trip free manual reset switching action
  • Male quick connect terminals and lead wire assemblies available
  • Weld terminals standard
  • Wide selection of bi-metal disc and heater combinations available
  • Single pole, single throw

Agency Ratings

(consult catalog for details)

  • Catalog
    30M Motor Protector Product Specifications
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93J Thermistor Sensor Temperature Sensor

93J Thermistor Sensor Temperature Sensor


Technology: Sensing

Product Category: Temperature Sensors

Application: Appliance

Brand: Therm-O-Disc


93J Temperature Sensor offers extremely fast thermal response in a minimal, rugged, cost-effective design. The body can be made from stainless steel, plastic, nickel-plated copper or other customer-specified materials. The internal thermistor element can be selected to meet any resistance-temperature curve and tolerance. The 93J is used in many applications including boiler systems, coffee makers, and many other applications where fast response in liquid is required.

  • Operating Environment:
  • Operating Temperature:
  • Thermal Response (Sec.):
  • Humid, Immersion
  • -40°C to 200°C (-40°F to 392°F)
  • <1
  • Bodies in nickel-plated copper, plastic, stainless steel or others available
  • Custom body lengths, diameters and application-specific mountings are available
  • Excellent moisture resistance
  • Lead wires of various lengths and colors are available
  • Liquid temperature sensing

Agency Ratings

(consult catalog for details)

  • Catalog
    93J Temp Sensor Product Specifications
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  • Application Note
    Temperature Sensors Case Study
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36J Thermistor Sensor Temperature Sensor

36J Thermistor Sensor Temperature Sensor


Technology: Sensing

Product Category: Temperature Sensors

Application: HVAC

Brand: Therm-O-Disc


36J Thermistor Sensor offers the electronic advantage of a thermistor in the time-honored and versatile packaging of Therm-O-Disc’s 36T series. The Thermistor element can be selected to meet any resistance-temperature curve and tolerance. The 36J is used in several applications including clothes dryers, ventilation systems, coffee makers, dishwashers, HVAC systems, and many other applications.

  • Operating Environment:
  • Operating Temperature:
  • Thermal Response (Sec.):
  • Small Design, Measures Airstream or Surface Temperature
  • -40°C to 200°C (-40°F to 392°F)
  • <2
  • 11, 13, 15, 18 and 22mm pipe diameter clips available for Tube Mount body option
  • 2.8 & 6.35 mm quick-connector terminal blades for fast wiring or molded-in connector options
  • No mount, Tube Mount, Airstream Mount, Surface Mount and Wide Flange Mount options are available as standard. Others available upon request.
  • PPS plastic bodies with stainless steel or aluminum caps standard with other materials available

Agency Ratings

(consult catalog for details)

  • Catalog
    36J Temp Sensor Product Specifications
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  • Application Note
    Temperature Sensors Case Study
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10RS Laundry

10RS Laundry


Technology: Safety limits and Controls

Product Category: Bi-metal

Application: Appliance

Brand: Therm-O-Disc


The 10RS auto reset bimetal radiant sensor from Therm–O–Disc® offers proven reliability in a specialized and cost-effective design for electrical loads up to 5.75 amps at 120 VAC. The CSA certified 10RS is most commonly used in hot surface ignition applications, such as gas clothes dryers.

  • Function:
  • Max Calibration:
  • Max Electrical Amperage:
  • Auto Reset
  • Ambient operating range 32°F to 325°F
  • 5.7
  • .032” x .250” (.81mmx 6.35mm) brass quick connect terminal
  • Glass window to maximize effect of radiant energy on bimetal element and limit exposure of sensor package to high igniter temperatures
  • Single pole, single throw
  • Tab and screw mounting plate

Agency Ratings

(consult catalog for details)

  • Catalog
    10RS Radiant Energy Special Purpose Control Product Specifications
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13J Thermistor Sensor Temperature Sensor

13J Thermistor Sensor Temperature Sensor


Technology: Sensing

Product Category: Temperature Sensors

Application: HVAC

Brand: Therm-O-Disc


13J Temperature Sensor offers extremely fast thermal response in a minimal, rugged, cost-effective design. The internal thermistor element can be selected to meet any resistance-temperature curve and tolerance. The 13J is used in many applications including boiler systems, coffee makers, and many other applications where fast response in liquid is required.

  • Operating Environment:
  • Operating Temperature:
  • Thermal Response (Sec.):
  • Dry, Exposed NTC
  • -40°C to 200°C (-40°F to 392°F)
  • <1
  • Leadwire thermistor with shrink tube NTC

Agency Ratings

(consult catalog for details)

  • Catalog
    13J Temp Sensor Product Specifications
    Read More
  • Application Note
    Temperature Sensors Case Study
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