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Rotary Switches

Rotary switches are widely used in applications including construction, automobiles, communications, and industry. They are used to transmit electrical signals or to control various types of equipment. Rotary switches come in a variety of styles, shapes and sizes and they can be either latching or momentary.

The 09A30-04-4-03N is a type of rotary switch that is widely used in many electrical applications. It is a four-pole and four-position rotary switch designed for switched circuitry that requires all four poles to be actively engaged. It has two common terminals and two isolated terminals and is designed with high-current, low-contact resistance, and powder metallurgy contacts.

Application Fields

Rotary switches are suitable for various types of electrical circuits and devices such as motors, lighting systems, door locks, machine tools, control panels, and instruments.

• The 09A30-04-4-03N is commonly used in controls for appliances, including microwave ovens, washing machines, and stoves
• It is also used in lighting systems, such as dimmers, switches and timers
• In the automotive industry it is used to control vehicle electronics, such as airbags, seat belts, and brakes
• It is also used to control audio and video components, such as antennas, speakers, and amplifiers.

Working Principle

When a rotary switch is actuated, the internal contact points move, initiating a circuit connection between the two contacts. These contact points then remain in their rotated position until they are manually re-adjusted by turning the switch off.

The 09A30-04-4-03N rotary switch is designed so that the left switch position closes two circuits simultaneously. This is achieved by carrying current to the terminals in a ‘cross’ pattern like X. So when the switch is rotated clockwise, it will connect terminals 1 and 3, and then terminals 2 and 4. This allows for two different circuits to be closed or opened at the same time.

The 09A30-04-4-03N rotary switch is available in both panel-mount and through-hole configurations. Panel mount variants are used to mount the switch directly to a wall or other surface. Through-hole versions allow the switch to be mounted within the enclosure which provides greater protection against dust and moisture.

Conclusion

The 09A30-04-4-03N rotary switch is a reliable and versatile device that can be used in a wide variety of applications. It is a four-pole and four-position switch with two common terminals and two isolated terminals that can be used to transmit electrical signals or control various types of equipment. It is available in both panel-mount and through-hole configurations, allowing for the switch to be mounted in different ways depending on the application.

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