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    Thermostats

    3MS1 QPL Series

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

    Overview

    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
    Specifications

    Others

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

    Others

    • Operating temperature
      • -46 °C to 191 °C [-50 °F to 375 °F]
    • Vibration
      • MIL-STD-202, Method 204; 20 G
    • Acceleration Range/Limits
      • MIL-STD-202, Method 212; 20 G
    • Insulation Resistance
      • MIL-STD-202, Method 302; 500 MOhm
    • Humidity
      • MIL-STD-202, Method 106
    • Thermostat Environmental Exposure Range
      • -65 °C to 260 °C [-85 °F to 500 °F]
    • Seal Type
      • MIL-STD-202, Method 112; Cond. C
    • Dielectric Strength
      • MIL-STD-202, Method 301; 1250 Vac 60 Hz - Terminal to Case
    • Agency Approvals and Standards
      • MIL-PRF-24236/1 and QPL
    • Thermal Shock
      • MIL-STD-202, Method 107; Cond. B
    • Shock
      • MIL-STD-202, Method 213; 100 G
    • Thermostat Contact Resistance
      • MIL-STD-202, Method 307; 0.050 Ohm max.
    • Salt Spray
      • MIL-STD-202, Method 101; Cond. B
    • Operating temperature : -46 °C to 191 °C [-50 °F to 375 °F]
    • Vibration : MIL-STD-202, Method 204; 20 G
    • Acceleration Range/Limits : MIL-STD-202, Method 212; 20 G
    • Insulation Resistance : MIL-STD-202, Method 302; 500 MOhm
    • Humidity : MIL-STD-202, Method 106
    • Thermostat Environmental Exposure Range : -65 °C to 260 °C [-85 °F to 500 °F]
    • Seal Type : MIL-STD-202, Method 112; Cond. C
    • Dielectric Strength : MIL-STD-202, Method 301; 1250 Vac 60 Hz - Terminal to Case
    • Agency Approvals and Standards : MIL-PRF-24236/1 and QPL
    • Thermal Shock : MIL-STD-202, Method 107; Cond. B
    • Shock : MIL-STD-202, Method 213; 100 G
    • Thermostat Contact Resistance : MIL-STD-202, Method 307; 0.050 Ohm max.
    • Salt Spray : MIL-STD-202, Method 101; Cond. B
    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
    Aerospace and Defense Product Range Guide
    application/pdf 19.65 MB
    9/23/2024
    19.65 MB
    Technical Tip Bulletin - Precision Thermostat | Gold Contact Selection Guide
    application/pdf 33.28 KB
    8/24/2021
    33.28 KB
    Thermostats Line Guide
    application/pdf 450.42 KB
    7/16/2021
    450.42 KB
    Precision Thermostat Selection Guide
    application/pdf 258.21 KB
    8/24/2021
    258.21 KB
    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
    Forestry Vehicles
    application/pdf 1.05 MB
    12/20/2022
    1.05 MB
    Platform Vehicles
    application/pdf 628.05 KB
    12/20/2022
    628.05 KB
    Agricultural Vehicles
    application/pdf 1.11 MB
    4/11/2024
    1.11 MB
    Construction Vehicles -
    application/pdf 984.29 KB
    12/20/2022
    984.29 KB
    Defence Ground Vehicles -
    application/pdf 872.87 KB
    6/14/2023
    872.87 KB
    Name
    Description
    File Size
    Date
    Size
    Soldering Wire Leads on Precision Hermetic Thermostats
    application/pdf 216.61 KB
    8/24/2021
    216.61 KB
    Industrial Applications: Going Beyond Limits
    application/pdf 16.69 MB
    11/17/2022
    16.69 MB
    Industrial Product Line Card --
    application/pdf 2.24 MB
    10/25/2022
    2.24 MB
    Forestry Vehicles
    application/pdf 1.05 MB
    12/20/2022
    1.05 MB
    Platform Vehicles
    application/pdf 628.05 KB
    12/20/2022
    628.05 KB
    Agricultural Vehicles
    application/pdf 1.11 MB
    4/11/2024
    1.11 MB
    Precision and High Reliability Thermostats
    application/pdf 5.15 MB
    8/24/2021
    5.15 MB
    Construction Vehicles -
    application/pdf 984.29 KB
    12/20/2022
    984.29 KB
    Aerospace and Defense Product Range Guide
    application/pdf 19.65 MB
    9/23/2024
    19.65 MB
    Technical Tip Bulletin - Precision Thermostat | Gold Contact Selection Guide
    application/pdf 33.28 KB
    8/24/2021
    33.28 KB
    Defence Ground Vehicles -
    application/pdf 872.87 KB
    6/14/2023
    872.87 KB
    Thermostats Line Guide
    application/pdf 450.42 KB
    7/16/2021
    450.42 KB
    Precision Thermostat Selection Guide
    application/pdf 258.21 KB
    8/24/2021
    258.21 KB
    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
    Aerospace and Defense Product Range Guide
    19.65 MB
    9/23/2024
    Technical Tip Bulletin - Precision Thermostat | Gold Contact Selection Guide
    33.28 KB
    8/24/2021
    Thermostats Line Guide
    450.42 KB
    7/16/2021
    Precision Thermostat Selection Guide
    258.21 KB
    8/24/2021
    Industrial Applications: Going Beyond Limits
    16.69 MB
    11/17/2022
    Industrial Product Line Card --
    2.24 MB
    10/25/2022
    Forestry Vehicles
    1.05 MB
    12/20/2022
    Platform Vehicles
    628.05 KB
    12/20/2022
    Agricultural Vehicles
    1.11 MB
    4/11/2024
    Construction Vehicles -
    984.29 KB
    12/20/2022
    Defence Ground Vehicles -
    872.87 KB
    6/14/2023
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