4 Pole 3 Way Rotary Switch Plastic

A rotary switch is a way to control many different circuits or select many different values for one circuit with a single switch. Depending on its position, the switch revolves in a circle, turning various circuits. Rotary switches were often used on televisions to choose different channels before digital technology took off. Many applications, including as CB radios, industrial controllers, electronic equipment, and even certain aeroplanes, still use them. The fundamental benefit of a rotary switch is that its layered characteristic allows numerous poles to be used.

The spindle

In a rotary switch, the current passes via a spinning spindle that contains numerous distinct rotors. When the switch is in a given position, an arm protruding outward from each rotor will make contact with a terminal. A switch can have dozens of positions, each of which is generally associated with a distinct circuit.

Controlling the Switch

It is just necessary for the rotary switch to be in the precise position for it to appear on a certain circuit. A rotor that rotated too freely would be difficult to control and might easily be switched off or tossed to the wrong position. To prevent this, rotary switches feature a detent mechanism that causes the switch to “click” into place and stay in that position until it is turned with adequate effort. A detent is a wheel that is mounted to the rotor and has notches or grooves. A needle bearing with a spring or a sliver of spring steel is pressed against the wheel. Rotary switches, as a result of these characteristics, can give larger pole and throw capabilities than basic switches.