What type of switches must aircraft switches be?

Aircraft switches need to be snap-action type because they provide a reliable and consistent operation critical for maintaining safety and functionality in avionic systems. Snap-action switches are designed to operate quickly and with minimal motion, which can help to prevent issues such as bounce or inconsistent states. This is particularly important in aircraft systems, where a clear and definitive action—such as switching on or off circuits—is required to avoid ambiguities that could lead to failures or safety hazards.

The construction of snap-action switches also typically includes mechanisms that ensure the contacts fully engage or disengage, something vital in environments where vibration is present, such as in aircraft. This assures that even under extreme conditions, the switches will perform reliably compared to some other types, which might not have the same level of robustness or responsiveness.

Other types of switches, while useful in different contexts, may not meet the specific needs of aircraft avionics systems. For instance, toggle-type switches can be cumbersome and might not provide the rapid action necessary in critical situations. Momentary-type switches may not be ideal for maintaining a continuous connection when needed, and rotary-type switches can introduce complexity and potential failure points due to mechanical wear over time. Snap-action switches strike the right balance of reliability, speed, and durability, making them