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Thermostats

3MS1 QPL Series

Military. QPL. Each unit 100% inspected. Hermetically sealed. Tight tolerances & differentials. SPST contacts. Mounting brackets, terminals.

The 3MS1 QPL Series consists of a single pole, single throw switch activated by a snap-action bimetal disc. Temperature calibrations are pre-set at the factory, and each unit is 100% thermally and mechanically inspected. It is available to open or close on temperature rise. The case is laser welded to form a hermetically sealed steel housing with a glass-to-metal seal at the terminal junction. It is qualified to MIL-S-24236 and is QPL listed for military applications.

Features
  • Hermetically sealed
  • Tight tolerances
  • Tight differentials
  • Hi-Rel
  • QPL listed
Potential Applications
  • Military

Others

  • Thermal Shock
    • MIL-STD-202, Method 107; Cond. B
  • Agency Approvals and Standards
    • MIL-PRF-24236/1 and QPL
  • Humidity
    • MIL-STD-202, Method 106
  • Thermostat Contact Resistance
    • MIL-STD-202, Method 307; 0.050 Ohm max.
  • Acceleration Range/Limits
    • MIL-STD-202, Method 212; 20 G
  • Operating Temperature
    • -46 °C to 191 °C [-50 °F to 375 °F]
  • Vibration
    • MIL-STD-202, Method 204; 20 G
  • Insulation Resistance
    • MIL-STD-202, Method 302; 500 MOhm
  • Salt Spray
    • MIL-STD-202, Method 101; Cond. B
  • Dielectric Strength
    • MIL-STD-202, Method 301; 1250 Vac 60 Hz - Terminal to Case
  • Thermostat Environmental Exposure Range
    • -65 °C to 260 °C [-85 °F to 500 °F]
  • Shock
    • MIL-STD-202, Method 213; 100 G
  • Seal Type
    • MIL-STD-202, Method 112; Cond. C

Others

  • Thermal Shock
    • MIL-STD-202, Method 107; Cond. B
  • Agency Approvals and Standards
    • MIL-PRF-24236/1 and QPL
  • Humidity
    • MIL-STD-202, Method 106
  • Thermostat Contact Resistance
    • MIL-STD-202, Method 307; 0.050 Ohm max.
  • Acceleration Range/Limits
    • MIL-STD-202, Method 212; 20 G
  • Operating Temperature
    • -46 °C to 191 °C [-50 °F to 375 °F]
  • Vibration
    • MIL-STD-202, Method 204; 20 G
  • Insulation Resistance
    • MIL-STD-202, Method 302; 500 MOhm
  • Salt Spray
    • MIL-STD-202, Method 101; Cond. B
  • Dielectric Strength
    • MIL-STD-202, Method 301; 1250 Vac 60 Hz - Terminal to Case
  • Thermostat Environmental Exposure Range
    • -65 °C to 260 °C [-85 °F to 500 °F]
  • Shock
    • MIL-STD-202, Method 213; 100 G
  • Seal Type
    • MIL-STD-202, Method 112; Cond. C
  • Thermal Shock : MIL-STD-202, Method 107; Cond. B
  • Agency Approvals and Standards : MIL-PRF-24236/1 and QPL
  • Humidity : MIL-STD-202, Method 106
  • Thermostat Contact Resistance : MIL-STD-202, Method 307; 0.050 Ohm max.
  • Acceleration Range/Limits : MIL-STD-202, Method 212; 20 G
  • Operating Temperature : -46 °C to 191 °C [-50 °F to 375 °F]
  • Vibration : MIL-STD-202, Method 204; 20 G
  • Insulation Resistance : MIL-STD-202, Method 302; 500 MOhm
  • Salt Spray : MIL-STD-202, Method 101; Cond. B
  • Dielectric Strength : MIL-STD-202, Method 301; 1250 Vac 60 Hz - Terminal to Case
  • Thermostat Environmental Exposure Range : -65 °C to 260 °C [-85 °F to 500 °F]
  • Shock : MIL-STD-202, Method 213; 100 G
  • Seal Type : MIL-STD-202, Method 112; Cond. C
Data Sheet
Name
Description
File Size
Date
Size
Precision and High Reliability Thermostats
application/pdf 5.15 MB
8/24/2021
5.15 MB
Manuals and Guides
Name
Description
File Size
Date
Size
Soldering Wire Leads on Precision Hermetic Thermostats
application/pdf 216.61 KB
8/24/2021
216.61 KB
Precision Thermostat Selection Guide
application/pdf 258.21 KB
8/24/2021
258.21 KB
Thermostats Line Guide
application/pdf 450.42 KB
7/16/2021
450.42 KB
Technical Tip Bulletin - Precision Thermostat | Gold Contact Selection Guide
application/pdf 33.28 KB
8/24/2021
33.28 KB
Thermal Sensors Product Range Guide
application/pdf 977.58 KB
8/12/2021
977.58 KB
Aerospace and Defense Product Range Guide -
application/pdf 16.36 MB
11/17/2022
16.36 MB
Brochure
Name
Description
File Size
Date
Size
Industrial Applications: Going Beyond Limits
application/pdf 16.69 MB
11/17/2022
16.69 MB
Technical Note
Name
Description
File Size
Date
Size
Industrial Product Line Card --
application/pdf 2.24 MB
10/25/2022
2.24 MB
Application Note
Name
Description
File Size
Date
Size
Defence Ground Vehicles -
application/pdf 872.87 KB
10/25/2022
872.87 KB
Construction Vehicles -
application/pdf 984.29 KB
10/24/2022
984.29 KB
Agricultural Vehicles -
application/pdf 1.11 MB
10/25/2022
1.11 MB
Platform Vehicles
application/pdf 628.05 KB
6/23/2022
628.05 KB
Forestry Vehicles
application/pdf 1.05 MB
6/23/2022
1.05 MB
Name
Description
File Size
Date
Size
Soldering Wire Leads on Precision Hermetic Thermostats
216.61 KB
8/24/2021
216.61 KB
Precision Thermostat Selection Guide
258.21 KB
8/24/2021
258.21 KB
Thermostats Line Guide
450.42 KB
7/16/2021
450.42 KB
Defence Ground Vehicles -
872.87 KB
10/25/2022
872.87 KB
Technical Tip Bulletin - Precision Thermostat | Gold Contact Selection Guide
33.28 KB
8/24/2021
33.28 KB
Thermal Sensors Product Range Guide
977.58 KB
8/12/2021
977.58 KB
Aerospace and Defense Product Range Guide -
16.36 MB
11/17/2022
16.36 MB
Construction Vehicles -
984.29 KB
10/24/2022
984.29 KB
Precision and High Reliability Thermostats
5.15 MB
8/24/2021
5.15 MB
Agricultural Vehicles -
1.11 MB
10/25/2022
1.11 MB
Platform Vehicles
628.05 KB
6/23/2022
628.05 KB
Forestry Vehicles
1.05 MB
6/23/2022
1.05 MB
Industrial Product Line Card --
2.24 MB
10/25/2022
2.24 MB
Industrial Applications: Going Beyond Limits
16.69 MB
11/17/2022
16.69 MB
Name
Description
File Size
Date
Size
Precision and High Reliability Thermostats
5.15 MB
8/24/2021
Soldering Wire Leads on Precision Hermetic Thermostats
216.61 KB
8/24/2021
Precision Thermostat Selection Guide
258.21 KB
8/24/2021
Thermostats Line Guide
450.42 KB
7/16/2021
Technical Tip Bulletin - Precision Thermostat | Gold Contact Selection Guide
33.28 KB
8/24/2021
Thermal Sensors Product Range Guide
977.58 KB
8/12/2021
Aerospace and Defense Product Range Guide -
16.36 MB
11/17/2022
Industrial Applications: Going Beyond Limits
16.69 MB
11/17/2022
Industrial Product Line Card --
2.24 MB
10/25/2022
Defence Ground Vehicles -
872.87 KB
10/25/2022
Construction Vehicles -
984.29 KB
10/24/2022
Agricultural Vehicles -
1.11 MB
10/25/2022
Platform Vehicles
628.05 KB
6/23/2022
Forestry Vehicles
1.05 MB
6/23/2022