Momentary and latching metal push button switches

In metal push button switches—including the 19MM model with a power logo—response time (from actuation to contact closure) differs notably between momentary and latching versions, with implications for high-speed control applications.

Momentary metal push button switches, designed for temporary actuation, typically feature a shorter response time, often ranging from 5 to 20 milliseconds. Their mechanical design prioritizes rapid contact closure: the spring-loaded mechanism ensures that once the button is pressed to the actuation point, contacts engage almost immediately without additional mechanical steps. This swift response aligns with their intended use in scenarios requiring quick, transient signals, such as triggering emergency stops or initiating short-cycle operations.

Latching switches, by contrast, generally exhibit longer response times, often 20 to 50 milliseconds or more. This delay stems from their mechanical latching mechanism, which requires an extra step to lock the button in the actuated position. When pressed, the switch must not only close the contacts but also engage a locking mechanism (e.g., a detent or ratchet system) to maintain the state. This dual action introduces a slight lag compared to momentary switches.

For high-speed control applications—such as automated manufacturing lines, robotics, or precision machinery—this difference is meaningful. Momentary switches are better suited here because their faster response minimizes latency in signal transmission, ensuring that commands (e.g., stopping a conveyor or adjusting a tool) are executed with minimal delay. In systems where milliseconds matter, the slower response of latching switches could lead to timing discrepancies, reducing precision or causing operational inefficiencies.

However, latching metal switches are not inherently unsuitable for all high-speed contexts. They remain viable in applications where the "maintained state" function is critical (e.g., powering a high-speed motor that runs continuously), as their latency is negligible compared to the overall operation duration. The key distinction lies in whether the application demands rapid, transient signaling (favoring momentary) or stable state retention with less emphasis on actuation speed (favoring latching).

If you need more details on specific scenarios where this time difference plays a critical role, or want to explore how other features of the 19MM round metal switch interact with response time, feel free to let me know.