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BackHeight, https://omronfs.omron.com/en_US/ecb/products/pdf/en-b3fs.pdf C&K Components SPST SMD PTS645 Series 6mm Tact Switch with High Contact Reliability, Side-actuated Model, without Ground Terminal, with Boss Ultra-small-sized Tactile Switch SPST.
- 0.5mm Analog Devices (Linear Tech), 133-pin BGA.
- Included for reference. $33.20/board from.
- Red green D Push button switch, push-to-open.