Our 250 Series snap-action thermal switches are specifically designed for applications requiring more than 5 amperes at 28Vdc resistive in a robust hermetic package. It's used in applications as diverse as commercial aircraft, missiles, radars, locomotives, battery systems – basically any place where a robust package, higher voltages and/or currents are required than can be managed by a sub-miniature thermal switch.
The hermetic all-welded construction of the 250 Series allows use in a broad range of temperature and altitude applications. It is available in a variety of configurations and comes with either solder terminals or screw type lugs. The capabilities of the 250 Series are a result of larger scale, larger contacts, larger glass to metal seals, larger spring deflection, larger bimetal disc diameter and thickness. Because of the size, the design is thermally very stable.
The mounting hardware is equally robust. Some users have selected the 250 Series because it is mechanically solid compared to half-inch mechanism. A few have used it to mechanically secure other parts while simultaneously acting as a switch.
Series 250 specifics include:
• Miniature Hermetic Thermal Switch
• 250 Series
• 7/8" mechanism
• 10 ampere 28Vdc
Thermal switches exported from the United States must be done in accordance with the export administration regulations (EAR) and/or the international traffic in arms regulations (ITAR) as applicable.