senasys
3/4″ Bi-Metal Snap Disc Thermostats
3/4″ Bi-Metal Snap Disc Thermostats from Senasys are precision-engineered thermal switches built for high-performance temperature control in demanding environments. These thermostats are rated up to 40 amps at 240 volts with a cycle life exceeding 100,000 operations, making them ideal for use in industrial systems, HVAC equipment, food service machines & heating applications.
Each unit uses a 3/4″ bi-metal thermodisc with a factory-preset temperature setpoint, activating within a range of 0°F to 350°F (-18°C to 176°C). These thermostats deliver consistent, mechanical thermal switching, providing reliable overheat protection & temperature regulation across a wide range of systems.
Available Types
• Automatic Reset
• Epoxy Sealed Automatic Reset
• Manual Reset
• Single Shot
Custom options
Manufactured to individual temperature specifications • Available in a variety of terminal and mounting configurations
high quality
All units are subject to 100% mechanical and thermal inspection.
certified
Recognized by UL and CUL • Meets UL Standard 873 and 353
made in u.s.a.
Designed & manufactured in Eau Claire, WI, U.S.A.
Automatic Reset (2511 Series)
The 2511 automatic reset snap disc thermostats can be configured to either open or close their electrical contacts as temperature increases. Once the bimetal disc cools to the specified reset temperature, the contacts automatically return to their original position, allowing normal operation to resume.
Epoxy Sealed (Single Pole, Single Throw)
Senasys 2570 Series 3/4″ epoxy sealed snap disc thermostats are built for reliable, long-term temperature control in harsh environments. The sealed design protects the switch from moisture, dust, vibration, and other external factors, making it suitable for demanding industrial, HVAC, and outdoor applications.
Epoxy Sealed (Single Pole, Double Throw)
The 416 Series is the SPDT version of Senasys’ encapsulated 3/4″ automatic reset snap disc thermostat. Designed for use in harsh environments, the sealed housing provides moisture & dust resistance, making it ideal for refrigeration systems, air conditioning units, and industrial equipment that require reliable thermal control in exposed conditions.
Manual Reset
A manual reset snap disc thermostat is designed with contacts that open on temperature rise. Once the temperature falls below the calibrated open point, the circuit can be manually reset by pressing the reset button. This design prevents automatic restart, adding an extra layer of safety in overheat protection applications.
Single Shot
Single shot snap disc thermostats are non-resettable high-limit controls used in applications where automatic reset is not permitted. When the set temperature is reached, the contacts open permanently to interrupt the circuit, preventing system restart until the thermostat is physically replaced. This provides a fail-safe response in critical overheat conditions.
Adjustable Snap Disc Thermostats (KST Series)
Senasys 3/4″ Adjustable Snap Disc Thermostats (KST Series) are designed for applications that require a field-adjustable switching temperature. These thermostats allow precise on-site calibration within a specified range, making them ideal for systems with variable thermal control requirements across industrial, HVAC, and equipment applications.