The manufacturer specifies this switch as unsealed and non-washable, contrary to the current project description. I’ll highlight that correction and distinguish the two verified functional alternatives from unverified drop-in replacements.
The Omron B3FS-1002P is a top-actuated, surface-mount tactile pushbutton with an SPST normally-open contact and a 3.1 mm actuator height. Its common integration is an active-low microcontroller user-input button, using a pull-up resistor and debouncing rather than directly switching a power load.
Important correction: B3FS is a standard, unsealed, non-washable switch—not a sealed or waterproof switch. Omron lists IEC IP00 and explicitly prohibits washing; the existing project description's sealed-construction claim should not be used for design qualification. [^flux:cite:src_page_5_tr_td_r...
Created the cited B3FS-1002P Application and Usage Guide in the project files, covering all seven requested sections, practical GPIO wiring, debouncing, alternatives, and sourcing.
The guide flags an important correction: this switch is unsealed and non-washable, contrary to the project description. Exact footprint dimensions and drop-in compatibility remain explicitly unverified; the existing part and description were not changed.