12AT Toggle actuated hermetic switches

On NASA’s Apollo space program, Sensata 12AT Series Toggle Actuated Hermetic Switches traveled to the moon and back, including moon landings on Apollo 11 and later missions. The 12AT series utilizes gas tight switch elements with a robust design ideal for use on military aircraft, space-craft, space suit EVA, military ground, and other extremely harsh environments like oil and gas. Switch designs are available in single pole and multiple pole configurations with momentary, maintain, or locked toggle actions. The Klixon® 10AT series are stainless steel, hermetic position limit switches, Klixon® 11AT and 12AT series are position control switches. All are ideal for extremely harsh and demanding environments as found in aircraft, military, aerospace, and aircraft engines applications. Klixon® precision hermetic position switches have been used for over 40 years in a wide range of applications, and can be found on virtually all commercial and military aircraft, as well as various space vehicles and satellites worldwide.



IP code rating


Max current

2A; 4A

MIL approval


Product sheet


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A world leader and early innovator in mission-critical sensors and controls designed to make the world cleaner, safer and more efficient. You will find these in many applications – anywhere from automotive braking systems to aircraft flight controls. Klixon high precision thermostats and circuit breakers are very reliable with very low weight and compact size for your secure function. 
Mission-critical means products that are essential and difficult to do. You’ll find Sensata Technologies 47,000 unique products in many applications – anywhere from automotive braking systems to aircraft flight controls. 
Sensata devices are in systems that protect people and the environment, so what we do matters. Take pride in knowing Sensata’s technologies improve safety, efficiency and comfort for millions of people every day.