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 Thermostats
These 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 Thermostats
These 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.

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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庫存編號 466-986
製造零件編號603026/0202-1-025-30-0-00-20-13-46-120-15-6/000
BrandJumo
TWD9,415.00
單位
0°C +100°C - - Capillary NO/NC 0.25 (dc) A, 10 (ac) A 230 V ac/dc Screw - - -
RS庫存編號 111-7298
製造零件編號802L-080
BrandSelco
TWD293.00
單位
+40°C +120°C +80°C - Bi-Metallic SPST NC 1 A @ 120 V ac, 1 A @ 48 V dc, 20 mA @ 5 V dc 5 V dc @ 20 mA, 48 V dc @ 1 A, 120 V ac @ 1 A PCB Pin PCB Mount - Open On Rise
RS庫存編號 111-7182
製造零件編號ORA-425-QC
BrandSelco
TWD312.00
單位
+10°C +260°C +425°F +375°F Bi-Metallic NC 10 A @ 250 V ac, 15 A @ 125 V ac 125 V ac @ 15 A, 250 V ac @ 10 A Quick Connect Rotating Bracket Automatic Open On Rise
RS庫存編號 467-169
製造零件編號603026/0170-1-052-30-0-00-20-13-46-150-15-6/000
BrandJumo
TWD11,311.00
單位
+30°C +110°C - - Capillary NO/NC 0.25 (dc) A, 10 (ac) A 230 V ac/dc Screw - - -
RS庫存編號 111-7303
製造零件編號OM-302-QCV
BrandSelco
TWD312.00
單位
+50°C +150°C +302°F - Bi-Metallic NC 10 A @ 250 V ac, 15 A @ 125 V ac 125 V ac @ 15 A, 250 V ac @ 10 A Quick Connect Surface Mount Manual Open On Rise
RS庫存編號 111-7146
製造零件編號OA-60
BrandSelco
TWD239.00
單位
- - - - - - - - - - - -
RS庫存編號 228-2620
製造零件編號2455R 9082-463 L110C
BrandHoneywell
TWD361.00
單位
- - +110°C - Bi-Metallic NC 10 A 250 V ac Solder Tab - - -
RS庫存編號 357-7519
製造零件編號602021/0001-025-000-25-1000-40-10-00-00-000-00-6
BrandJumo
TWD4,810.00
單位
0°C +100°C - - Capillary - 16 A @ 230 230 V ac Solder Tab - - -
RS庫存編號 229-5834
製造零件編號2455RP 9100-440 L125C
BrandHoneywell
TWD340.00
單位
0°C +186°C +125°C +110°C Bi-Metallic NC 10 A 250 V ac Solder Tab - - -
RS庫存編號 111-7143
製造零件編號CAP-MR-500-1
BrandSelco
TWD1,456.00
單位
- +260°C - - Capillary - 5 A 240 V ac Quick Connect - Manual -
RS庫存編號 494-0873
製造零件編號2455RC-90820389
BrandHoneywell
TWD307.00
單位
0°C +260°C +180°C - Bi-Metallic - 15 A - Quick Connect - - -
RS庫存編號 111-7183
製造零件編號ORA-450-QC
BrandSelco
TWD312.00
單位
+10°C +260°C +450°F +370°F Bi-Metallic NC 10 A @ 250 V ac, 15 A @ 125 V ac 125 V ac @ 15 A, 250 V ac @ 10 A Quick Connect Rotating Bracket Automatic Open On Rise
RS庫存編號 821-3490
製造零件編號3455RC 01000237
BrandHoneywell
TWD675.00
單位
+52°C +260°C +113°C +96°C Bi-Metallic SPST 15 A 120 → 250 V ac Screw - - -
RS庫存編號 733-4713
BrandRS PRO
TWD950.00
單位
- - - - - - - - - - Automatic -
RS庫存編號 821-3484
製造零件編號3455RC 01000230
BrandHoneywell
TWD696.00
單位
+52°C +260°C +73°C +57°C Bi-Metallic SPST 15 A 120 → 250 V ac Screw - - -
RS庫存編號 228-2664
製造零件編號2455R 9082-460 L20C
BrandHoneywell
TWD334.00
單位
- - +20°C - Bi-Metallic NC 15 A 240 V ac Quick Connect - - -
RS庫存編號 764-5237
製造零件編號604100/20-5-140-3000-0-40/404,
BrandJumo
TWD3,819.00
單位
-10°C +15°C - - Capillary SP 16 A - Push In Wall Mount - -
RS庫存編號 613-7647
製造零件編號603021/02-2-043-30-1000-40-10-00-00-000-00-6/000
BrandJumo
TWD6,006.00
單位
+20°C +150°C - - Capillary - 0.25 A - Screw - - -
RS庫存編號 357-7913
製造零件編號603021/02-2-043-30-1000-40-10-00-00-000-00-6/000
BrandJumo
TWD6,247.00
單位
+20°C +150°C - - Capillary - 0.25 (dc) A, 10 (ac) A 230 V ac/dc Screw - - -
RS庫存編號 357-7878
製造零件編號603021/01-2-043-30-1000-40-10-00-00-000-00-6/000
BrandJumo
TWD6,594.00
單位
+20°C +150°C - - Capillary NO/NC 10 A 230 V ac/dc Solder Tab - - -