Which type of switch typically has a higher cycle life?

• A. Magnetic switches
• B. Micro switches
• C. Both have the same cycle life
• D. Cycle life is not specified

Answer: (A)

Cycle life is about how many times a switch can be actuated before it wears out. Magnetic switches, often reed switches, use a simple internal contact that is activated by a nearby magnet. There aren’t complex moving parts or a separate actuator mechanism wearing out with each cycle. That means they endure many millions (sometimes billions) of cycles with minimal wear, especially at low currents.

Micro switches, on the other hand, have a mechanical actuator, springs, and a snap-action mechanism. The moving parts and contact surfaces experience wear and arcing over time, so their usable life is typically shorter than that of magnetic switches, even though they can be very reliable in their own right.

So, in most alarm-system contexts, magnetic switches typically offer a higher cycle life than micro switches.