Microwave door switch comparison
The switches common on the doors of microwaves are called "micro switches". Probably due to there small size. They are made to function so that when the switch is activated current flows (normally open 'N.O') or when switched no current flows (normally closed 'N.C'). The group that rates and test these switches is the Underwriters Laboratories. They establish how much voltage each switch is able to safely tolerate. These are the numbers you should try to match to the new switch. They are embossed on the switch in very minute detail. Usually something like: 5A 125-250V AC.