Bi-metal Snap Disc

Bi-metal discs can come in all shapes and sizes. Depending on your specifications and quantity, Senasys can build custom bi-metal snap discs to fit inside a thermostat switch. Our standard snap disc thermostat switches use a 1/2″ or 3/4″ disc. Give us a call for for more information or visit our online store to purchase.

Bi-Metal Snap Disc Diameters Explained

Bi-metal Snap Disc

Commonly if an application requires a faster response time to a temperature change or needs to be heavy duty (25A@120VAC / 30A@12VDC) we recommend our 3/4″ disc. The larger disc covers a larger area making the temperature response time more rapid.

Our 1/2″ bi-metal disc option is a great solution where a smaller footprint is needed.

Lastly, we do get the occasional request for 1/4″ bi-metal snap disc and if we have the capabilities to do it. To answer that question, yes we are capable, but what are your requirements?  Senasys does have inserts and tools that allow us to create ¼” discs with a thickness of .004”. So, to answer that questions yes we are capable, but what are you requirements? If you can provide Senasys the below information, we can quote properly:

  • What temperature does the disc need to snap?
  • What is your temperature tolerance and differential?
  • How much movement / space is there in the application?
  • What is your estimated annual usage?

Another interesting note we’d like to take this time to mention is Senasys will supply the bi-metal snap disc only. Send us the above details to get the ball rolling.

Senasys designs and manufactures snap disc thermostat switches. Senasys switches are UL and CUL Recognized. The majority of our switches are made in the United States and our direct customer service would be happy to help you find the right switch for your application. Senasys snap disc thermostats are single pole, single throw, fixed thermostat which may be used in applications such as industrial and HVAC equipment.

Senasys is open to new research projects, adjusting and pioneering new tools and products to fit our customers needs. If you have a custom temperature, air pressure or vacuum sensing application, give us a call at (715) 831-6353 or click here to send us an e-mail.

More Information about manual reset thermostat applications Request for Quote about Bi-Metal Snap Discs


No responses yet

Leave a Reply

Your email address will not be published. Required fields are marked *

Part Number Search
Can we help you find something?


    Temperature Switches
    Industrial Controls