09S30-04B12N

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Rotary switches are a versatile switch device that can enable an electrical system to be configured into various combinations of positions. The 09S30-04B12N is a multi-pole rotary switch typically used for applications requiring multiple connections in the same system. The switch is constructed from a durable plastic housing with a metal core and contact fingers.

Switch Connections

The 09S30-04B12N switch is designed with 12 connections offering either SPST, SPDT, and/or SP3T configuration. This is ideal for numerous applications where a combination of both break and make contacts is desired. The connections are made via 3-color code terminals, 6 are black, the rest are yellow and blue. Each set of connections is identified by a number on the housing, providing easy selection and wiring.

Switch Construction

The 09S30-04B12N switch is designed with a metal core enclosed in a durable plastic housing. The metal is typically formed from copper, brass or steel. This combination offers superior protection against electrical arcing and helps with insulation of the switch contacts. The housing also includes a central shaft for rotational drive and a locking sleeve for secure engagement.

The contacts are formed with a short spring-like finger that extends from the metal core to the adjoining terminal. This provides a reliable electrical connection of the two components and prevents the switch from becoming an electrical hazard. The contact fingers are gold-plated for improved conductivity and connection resistance.

Application Field

The 09S30-04B12N switch is ideal for a variety of applications in both low voltage and high voltage systems. Common uses include motor and fan controllers, alarm systems, electrical switching, and instrumentation. It is also used in aircraft and aerospace applications as well as in industrial settings.

Working Principle

The 09S30-04B12N switch relies on the cooperation of 2 components to provide the desired connection; the central shaft and the contact fingers. During each rotational cycle, the central shaft rotates through a series of contacts to establish the desired connection. As each contact is thrust in between the two contacting fingers, an electrical connection is established.

The rotational motion of the switch then moves the contact fingers to a new position and either an on or off condition is established depending on the selected configuration. This is the basic working principle of the 09S30-04B12N switch, allowing for minimal wiring and high current carrying rating.

Conclusion

The 09S30-04B12N rotary switch is an excellent choice for a variety of applications requiring both single pole and multiple pole connections. It offers an efficient way to wire a system by offering multiple combinations of break and make contacts. The 09S30-04B12N is also constructed with a durable plastic housing, metal core and gold-plated contact fingers, ensuring long-term performance and reliability.

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