Therm-O-Disc represents innovation in sensor and control development for the appliance, electronic and automotive industries. As the world's leading supplier of controls to the appliance industry, Therm-O-Disc offers a wide array of general and special-purpose products, including NTC Thermistors, Thermistor Probes, Snap Action Thermostats, and Micro Temp Thermal Cutoffs.  We do not supply repair or replacement parts to the public, please contact the OEM (original equipment manufacturer) for replacement parts.

NTC Thermistors Bi-Metal Thermostats Thermal Cutoffs
1H Axial Leaded +/- 10% 36T 1/2" Disc - 15 Amp                          G4A - 15 Amp
 P1H Axial Leaded +/- 2% 49T 3/4" Ceramic - 25 Amp High Temp                          G5A - 25 Amp
Packaged & Probe 60T 3/4" Disc - 25 Amp                          G4AM - High Temp

NTC Thermistors

Axial Leaded +/- 10% Precision Axial Leaded +/-2% Packaged +/- 10% Probe +/- 1%
            1H103T- 10K ohms             P1H302T - 3K ohms ASN1H103K - 10K ohm AP03201 - 10K ohm
            1H303T - 30K ohms             P1H103T - 10K ohms    
            1H104T - 100K ohms             P1H503T- 50K ohms    
              P1H104T - 100K ohms    

Snap Action Bi-Metal Temperature Switch/Thermostat

36T Series - 1/2" Bimetal Temperature Switch     

See our Video Introduction to 36T BiMetal Switches.

Ratings: 15 Amps @ 120 VAC, 10 Amps @ 250 VAC, normally closed and normally open designs, automatic reset, 1/4" x .032" (6.3mm x .8mm) quick connect blade terminals, surface mount. Switch tolerance +/- 5 degrees, 15 degree reset differential. Temperatures are in Celsius.

36T21 - Normally Closed - Open On Rise Thermostats

36T22 - Normally Open - Close On Rise Thermostats

49T Series - 3/4" Bimetal Ceramic High Temperature Switch

Ratings: 25 Amps @ 250 VAC, ceramic base, screw terminals, normally closed.

49T11 209183
     Airstream Mount - Open Temperature: 375 +/-15F, Close Temperature: 335 +/-20F
49T21 206727     Surface Mount - Open Temperature: 500 +/-20F, Close Temperature: 460 +/-25F

60T Series - 3/4" Bimetal Temperature Switch

Ratings: 25 Amps @ 240 VAC, normally closed, automatic reset, 1/4" x .032" (6.3mm x .8mm) quick connect blade terminals, surface mount. Switch tolerance +/- 8 degrees  on open, +/- 12 degrees on close. Temperatures are in Farenheit.

Normally Closed

Part Number        Switch Temperature
60T21 610057                  220 F
60T21 610112
                  300 F

60T21 202440                  325 F
60T21 610114
                  350 F

Microtemp Thermal Cutoffs

Microtemp Thermal Cutoffs from Therm-O-Disc offer an accurate, reliable solution to the need for upper limit temperature protection. Know as a thermal fuse, thermal link, or TCO, the MICROTEMP thermal cutoff provides protection against overheating by interrupting an electrical circuit when operating temperatures exceed the rated temperature of the cutoff.

The operating principle of the thermal cutoff is a electrically nonconductive pellet that under normal operating temperatures will hold the spring loaded contacts closed. When a predetermined temperature is reached, the pellet melts, allowing the compression spring to relax. The trip then slides the contact away from the lead and the circuit is opened. After the thermal cutoff opens the circuit it must be replaced. These devices are often referred to as "one shot" thermal fuses. All temperatures are in Celsius.

G4A MicroTemp Thermal Cutoffs

Ratings: 10A @ 250 VAC, 15A  @ 120 VAC

G4A MicroTemp Thermal Cutoffs

G5A MicroTemp Thermal Cutoffs

Ratings: 20A @ 250 VAC, 25A  @ 120 VAC

G5A MicroTemp Thermal Cutoffs

G4A Packaged Ceramic Microtemp Thermal Cutoff

Ratings: 10A @250 VAC, 15A @ 120 VAC with a high temperature ceramic base.

G4AM Packaged Ceramic Microtemp Thermal Cutoff

TESTCO does not provide service parts to the general public. Consequently, to receive an exact replacement part you must contact the Original Equipment Manufacturer (OEM).

Therm-O-Disc is a large manufacturer of bimetal thermostats, thermal fuses, and other devices. The majority of their products are custom made and proprietary for Original Equipment Manufacturers (OEM's).  We offer some standard configurations, however, the user must determine the suitability of the control for their application, including the level of reliability required, and are solely responsible for the function of the end-use product.  These controls contain exposed electrical components and are not intended to withstand exposure to water or other environmental contaminants which can compromise insulating components. Such exposure may result in insulation breakdown and accompanying localized electrical heating. A control may remain permanently closed or open as a result of exposure to excessive mechanical, electrical, thermal, or environmental conditions or at normal end-of-life. If failure of the control to operate could result in personal injury or property damage, the user should incorporate supplemental system control features to achieve the desired level of reliability and safety.

There are no express warranties that extend beyond the description contained herein. Please review our Terms & Conditions before ordering.

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