M - Push Buttons / Indicator Lamps - Item A to Z I...- ...he initials M for Push Buttons / Indicator Lamps is a product of less than 6. M16 M22 M22N M2BJ M2P M3U...
https://www.ia.omron.com/products/index/switches/push-buttons_indicator-lamps/M.html
We have introduced Indicator (Square) Ultra Bright...- ...els, and the new yellow, blue, and pure white models). Indicator (Square) Ultra Bright LED Type M2P Indicator (Square) Ultra Bright LED Type M2S...
https://www.ia.omron.com/new/information/2013/10/004.html
FAQ01846 for Push Buttons / Indicator Lamps | OMRO...- ...istor do not require an external resistor. Pushbutton Switches "A16" (M16), "A22" (M22), "A3P" (M2P), "A3K" (M2K), "A3S" (M2S) 61F-G[]N Improved Design for a More Lightweight Construction and...
https://www.ia.omron.com/support/faq/answer/38/faq01846/