As an easy guide for you we have created this simple cross reference guide to help you find the 1/2″ epoxy sealed thermostat switch you need. If you have one of the part numbers listed below, simply match it to our part number. Give us a call for for more information or visit our online store to purchase.

431 Series Epoxy Sealed Thermostat Switches

Senasys designs and manufactures epoxy sealed snap disc thermostat switches. Senasys switches are UL and CUL Recognized. All 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.

These cost-effective sealed thermostat switches are produced to exacting standards to meet the needs of original equipment manufacturers and instrument makers for a low cost, stable, repeatable switch.


Multiple mounting options, terminals, and temperatures are available. Please contact us with your application requirements for availability.

Click an option below to view more product details or purchase in our online shop.

Can’t find your part number listed? Give our direct support a call with your switch or application requirements and one of our customer service representatives will assist you!

Purchase Epoxy Sealed Thermostat Switches    Contact Senasys about epoxy sealed thermostat switches.

1/2" Epoxy Sealed Thermostat Cross Reference, 39T Thermodisc Thermostat, TK24K1, 2455 Honeywell Thermostat, 20N NGT Thermostat

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431 Epoxy Sealed Thermal Switch Surface Mount


Epoxy Sealed Thermostat

Surface Mount

The 431 series encapsulated half inch automatic reset snap discs are used whenever a moisture and dustproof enclosure is required for safe, sensitive and reliable operation.

Purchase 431-301A10 Epoxy Sealed Thermostat


Contact our technical support today!


The superior controls manufactured by Senasys have a history of solid performance in many industries. From 22.5 mm selectors, to the four quadrant lighted feedback CMC controls, almost any switching need can be, and has been utilized in a variety of applications. Select a group below for more information. When you have found a switch that fits your needs, simply fax or email your specs to us and let our highly trained engineers find the most efficient configuration for your applications.

Custom Soltutions

Senasys products are designed & manufactured to meet the needs of original equipment manufacturers worldwide.

Made in U.S.A.

Senasys products are designed & manufactured in Eau Claire, Wisconsin, U.S.A.