Thermostatic Switches

Thermostats are used in temperature control systems regulating air or liquids and can be used in both commercial and domestic applications. The two main types are capillary and bimetallic thermostats.RS Components offer a range of thermostats such as enclosure thermostats, mechanical HVAC thermostats, digital and programmable HVAC thermostats, digital and smart thermostats with Wi-Fi.What Does a Thermostat Do?It regulates the temperature of a liquid in a tank, or in conjuction with air conditioning units to monitor the air in a room/system. The thermostat simply switches the system off or on whenever necessary so that a constant temperature can be maintained. At home room thermostats switches on the heating when the room is cold and once the temperature has reached the level set, the programmable thermostat switches the heating off.Capillary ThermostatsThese consist of a sensor, capillary tube, diaphragms, a probe and an expansion medium. When the liquid heats up and expands, the temperature sensor is heated allowing for it to be converted into displacement in the diaphragm. The contacts within the closed circuit system can be opened or closed by this displacement due to pressure.Due to their accuracy and easy installation, they are widely used to control air and water temperatures and are suitable for use in storage heaters, hot tanks and boilers to control hot water.Bimetallic ThermostatsThese consist of a strip of two different metals with different coefficients of linear expansion. The bimetallic strip acts as an electric contact breaker in an electric heating circuit. When the desired temperature is reached, the circuit is broken.The strips of metal are bolted together. A bridge is then created in the electrical circuit and is connected to your heating system. The strip carries electricity through the circuit when the heating is on. When the strips get hot, both of the metals expand but one more so than the other. The hottest metal bends and opens the circuit. Once the circuit is open the electricity switches off and the heating cuts out.Once the heating is off, the room cools down which in turn cools down the strip of metal and allows it to go back to its original shape. When it cools, the metal goes back into the circuit and switches the heating back on as the electricity flow has been re-established. The metal strip takes a while to expand and contract so the heating is not constantly switching on and off every few seconds.

...
Read more Read less

Filters

Viewing 41 - 60 of 123 products
Results per page
Description Price Minimum Temperature Maximum Temperature Opening Temperature Closing Temperature Thermostat Type Switch Configuration Contact Rating Contact Voltage Rating Terminal Type Mounting Type Reset Type Switch Function
RS Stock No. 228-2535
Mfr. Part No.2455RC 9082-466 L220C
BrandHoneywell
$16.05
Each
units
0°C +260°C +220°C +180°C Bi-Metallic NC 10 A 250 V ac Solder Tab - - -
RS Stock No. 494-0845
Mfr. Part No.2455R-0820386
BrandHoneywell
$14.24
Each
units
0°C +150°C - - Bi-Metallic SPST 15 A 120 → 250 V ac Quick Connect - - -
RS Stock No. 228-2664
Mfr. Part No.2455R 9082-460 L20C
BrandHoneywell
$15.34
Each
units
- - +20°C - Bi-Metallic NC 15 A 240 V ac Quick Connect - - -
RS Stock No. 613-7811
Mfr. Part No.602021/0001
BrandJumo
$151.98
Each
units
0°C +100°C - - Capillary NO/NC 10 A - - - - -
RS Stock No. 228-2579
Mfr. Part No.2455RM 9082-469 L90C
BrandHoneywell
$17.22
Each
units
+50°C +150°C +90°C - Bi-Metallic NC 10 A 250 V ac Solder Tab - - -
RS Stock No. 228-2658
Mfr. Part No.2455R 9082-459 L15C
BrandHoneywell
$14.68
Each
units
- - +15°C - Bi-Metallic SPST 10 A 250 V ac Solder Tab - - -
RS Stock No. 613-7827
Mfr. Part No.602021/0001
BrandJumo
$134.05
Each
units
+50°C +200°C - - Capillary NO/NC 16 A - - - - -
RS Stock No. 467-034
Mfr. Part No.603026/0202-1-043-30-0-00-20-13-46-100-15-6/000
BrandJumo
$496.08
Each
units
+20°C +150°C - - Capillary NO/NC 0.25 (dc) A, 10 (ac) A 230 V ac/dc Screw - - -
RS Stock No. 518-4377
Mfr. Part No.602031/80-000-100-00-2000-40-10-6-40-13-460/707,
BrandJumo
$83.29
Each
units
+100°C +100°C - - Capillary NC 16 A 400 V Quick Connect Wall Mount - -
RS Stock No. 253-2694
Mfr. Part No.67F070
$18.66
Each
units
+40°C +130°C - +70°C Bi-Metallic NO 1 A 48 V dc, 120 V ac PCB Pin PCB Mount Automatic Close On Rise
RS Stock No. 158-4442
Mfr. Part No.603021/02-1-025-30-0-00-20-13-46-120-8-6/000
BrandJumo
$333.75
Each
units
0°C +100°C - - Capillary NO/NC 10 A 230 V ac/dc Solder Tab - - -
RS Stock No. 494-0851
Mfr. Part No.2455RC-90820387
BrandHoneywell
$17.43
Each
units
0°C +260°C +150°C - Bi-Metallic SPST NC 10/15 A 120 → 250 V ac Quick Connect - - -
RS Stock No. 228-2563
Mfr. Part No.2455R 9082-461 L25C
BrandHoneywell
$15.34
Each
units
- - +25°C - Bi-Metallic SPST NC 10 A 250 V ac Solder Tab - - -
RS Stock No. 229-5907
Mfr. Part No.2455RP 9100-433 L50C
BrandHoneywell
$15.32
Each
units
0°C +186°C +50°C +35°C Bi-Metallic NC 10 A 250 V ac Solder Tab - - -
RS Stock No. 357-9896
Mfr. Part No.602021/0001-064-000-25-2000-40-10-00-00-000-00-6
BrandJumo
$298.98
Each
units
+50°C +300°C - - Capillary - 0.25 A @ 230 Vdc, 16 A @ 230 Vac 230 V ac/dc Solder Tab - - -
RS Stock No. 253-2723
Mfr. Part No.67F100
$7.90
Each
units
+40°C +130°C - +100°C Bi-Metallic NO 1 A 48 V dc, 120 V ac PCB Pin PCB Mount Automatic Close On Rise
RS Stock No. 357-7531
Mfr. Part No.602021/0001-064-000-25-1000-40-10-00-00-000-00-6
BrandJumo
$233.95
Each
units
+50°C +300°C - - Capillary - 0.25 A @ 230 Vdc, 16 A @ 230 Vac 230 V ac/dc Solder Tab - - -
RS Stock No. 229-5963
Mfr. Part No.2455RP 9100-444 F70C
BrandHoneywell
$12.83
Each
units
0°C +186°C +55°C +70°C Bi-Metallic NO 10 A 250 V ac Solder Tab - - -
RS Stock No. 229-5890
Mfr. Part No.2455RP 9100-434 L60C
BrandHoneywell
$14.75
Each
units
0°C +186°C +60°C +45°C Bi-Metallic NC 10 A 250 V ac Solder Tab - - -
RS Stock No. 357-7834
Mfr. Part No.602021/0005-064-000-25-1000-40-10-00-00-000-00-6
BrandJumo
$296.08
Each
units
+50°C +300°C - - Capillary - 20 mA 24 V ac/dc Solder Tab - - -
Related Products
This is a modern wireless 7-day Programmable Room ...
Description:
This is a modern wireless 7-day Programmable Room Thermostat It is designed to provide automatic time and temperature control of domestic systems in domestic or light commercial premises. Compatible with 24-230V on/off appliances such as gas boilers, combi-boilers and zone ...
Snap action bi-metallic disc operates an SPST contact ...
Description:
Snap action bi-metallic disc operates an SPST contact which is electrically isolated from the mounting bracketAll types reset when the temperature falls to nominally 15° below operating temperature.• Phenolic body with stainless steel end cap.• 1/4in tab termination.• Contacts are ...
The ORA series from Selco offers a highly ...
Description:
The ORA series from Selco offers a highly reliable range of 1/2” disc thermostats These snap action thermostats open or close a circuit at a factory pre-set temperature and have been designed to work in a variety of different applications ...
Snap action bi-metallic disc operates an SPST contact ...
Description:
Snap action bi-metallic disc operates an SPST contact which is electrically isolated from the mounting bracketAll types reset when the temperature falls to nominally 15° below operating temperature.• Phenolic body with stainless steel end cap.• 1/4in tab termination.• Contacts are ...