71B30-02-4-03S

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Rotary switches are essential components of electronics that are used to turn on and off a circuit or to create a new route in a circuit.

The 71B30-02-4-03S rotary switch is a single pole-double throw (SPDT) rotary switch that is used to connect two different circuits when rotated. It has four terminals, with two input terminals, one common or “output” terminal and one “normally open” terminal.

The 71B30-02-4-03S’s application field is in a variety of electronics installations, such as light switches, sound systems, security locks, and more. It can be used to connect two circuits together and switch them on and off. It’s also often used as a security system for intercoms, video control systems, and more.

The working principle of the 71B30-02-4-03S is mechanical. When the switch is turned, the contact points (dials) on the switch move and connect a circuit to the second circuit. When the switch is off, the circuit is interrupted and no current flows.

The switch is made up of four parts:

• The Dial: The dial is the exterior portion of the switch, and it is the part that you physically turn.
• Coil spring: This is a spring that is wrapped around the dial and provides tension and resistance.
• Voltage regulation plate: The voltage regulation plate is a plate composed of a non-conductive material that helps to maintain a consistent voltage supply to the switch.
• Contact points: These are the actual contact points on the switch, and they are composed of a conductive material that creates the connection between the two circuits when the switch is turned.

The 81B30-02-4-03S works by having the dial turn from one circuit to the other by applying pressure to the coil spring. This pressure causes the voltage regulation plate to move, which in turn causes the contact points to slide across the two circuits.

As the dial turns, the contact points open and close, allowing the current to flow between the circuits. This is how the 71B30-02-4-03S rotary switch operates and why it is used in a variety of electronics and security systems.

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