what is a micro switch？

Micro switch makes physical contact with an object, When the plunger is in the released or rest position: the normally closed circuit can carry current,the normally open circuit is electrically insulated; When the plunger is depressed or switched: the normally closed circuit is open, the normally open circuit is closed.To help minimize mechanical stress and damage, you should make sure the actuator does not go beyond the allowed over-travel distance.

Micro switches have various types, including Pin plunger, Spring pin plunger, Spring short pin plunger,Panel mount pin plunger,Panel mounted (cross) roller pin plunger,Leaf spring,Roller leaf spring,Leaf lever,Simulated roller leaf lever,Hinge lever,Simulated roller lever,Hinge roller lever,Reverse operation hinge lever,Reverse operation hinge roller lever,Rotating operation,Flexible rod.

1,Electrical Ratings: As always, the first step is to figure out what kind of supply power you will be using for your switch. Is your power supply AC or DC? At what voltage?What is the largest current the contacts will have to switch? 2, Pole and Throw Count: The number of movable contacts you require determines how many poles you need in a switch. The number of fixed contacts determines how many throws, also called "way," you need. 3, Number of N.O. and N.C. Contacts: Normally open (N.O.) contacts remain open in their untriggered state and close when actuated. In contrast, normally closed (N.C.) contacts remain closed and open when actuated. 4, Enclosure: What kind of environment does your switch need to work in? Whether it needs to be waterproof and dustproof, etc.