1/2″ Epoxy Sealed Snap Disc Thermostats

Senasys tests our snap disc thermostats through air, fluid, hot plate and other testing standards. Learn more about our quality inspection here.

Our epoxy sealed thermostat switches are UL rated for 100,000 cycles 15 Amps at 120VAC / 10 Amps at 240VAC, and 0.5 Amps at 24VDC. We did some additional testing in house. Check out our results here!

Our complete switches aren’t rated for UL94, or any other particular flammability rating for that matter, individual components are. We did some testing in-house as well. Check out the results here!

For small quantities, we can build anything from 0°F to 220°F. Contact us for higher temperatures.

A snap disc does not use any power. Instead it acts as a circuit breaker for a system.

The body of the switch is plastic, and the mounting cap is either steel, aluminum, or brass.

Our products are designed and manufactured in Eau Claire, WI, U.S.A., and sold globally! We also have relationships with suppliers overseas to provide a more low cost solution when required.

One of the key advantages of gold contacts is their significantly lower contact resistance when compared to high-current silver contacts. This low resistance translates into improved electrical conductivity, allowing for smoother and more reliable signal transmission. This is especially important in applications where even the slightest interruption or distortion in the signal could lead to critical errors or malfunctions.

For more information on when gold contacts should be used, click here.

Our standard wire leads are black, 18 AWG at 12″ or 72″ length. We recommend the 72″ length, and then cutting down to what you need. We have other options available including color, lengths and gauge sizes. Click here to learn more.

Senasys manufacturers two different lines of sealed thermal switches,  431 series and 2570 series, which are  UL873 approved to be hermetically sealed. Our sealed snap disc thermal switches are commonly found in environments where condensation, dust or other material may be present.

Senasys performed a series of tests with our sealed thermostat switches by submerging them into fresh water and salt water. Click here to learn more.

For these types of switches 10ºF is about the smallest range they can maintain cost effectively and consistently.

For complex systems actual testing is usually pretty important. We support this process by making it easy to test multiple package styles and disc temps in sequence or all at once just give us a call. Learn more about temperature differentials here.

Continuity! Whether you have a hot or cold temperature thermostat, this test is easy and one of the first things we ask customers. Learn how to do so here.

Our standard tolerance is between 5°F to 10°F, but tighter tolerance options are available. We also offer a min/max type. Click here to learn more, or contact us with your requirements.

The location of the temperature switch inside your heating element should be well thought through. Temperature will change in various locations within the system depending on the heating element location. The further you distance from the heating element, the lower the temperature. Where a temperature switch is located will determine how accurate it can measure and control the system. Senasys typically recommends with all of our temperature switches the closer you can get to the heating element the better for the most accurate reading and fastest response time.

The 431 series has an IP68 rating. To learn more about IP ratings, click here!