12HR43-4

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Snap action, limit switches are mechanical control devices whose purpose is to limit the travel of a system component, such as a motor, or provide an exclusive control point. Examples of these mechanisms include relays, contactors, and limit switches. The 12HR43-4 limit switch is a single-pole double-throw (SPDT) switch typically used for the operation and control of two-speed motors, as well as other isolated systems.

The 12HR43-4 has two separate contact blocks-one for the switch system, and one for the motor control. The motor contact block has three terminals: two for the motor, and one for the control circuit. The switch contact block is designed to provide a single contact closure when the switch lever is moved either up or down. This provides the operator with a simple, direct control over the system.

The switch lever is actuated by the application of an appropriate force, usually supplied by the motor. When the lever is in the closed position, the contacts remain closed until the motor is turned off or the switch is released. This allows the operator to manually control the motor and thereby limit the travel of the system.

The 12HR43-4 has a limited range of control. It can only be used for short-term control, such as for the operation of motor starters or other low-power applications. However, due to its reliability and ease of use, it is commonly used in the control of industrial machinery.

In addition to its limited range of control, the 12HR43-4 is also subject to wear and tear due to normal use. The switch must be properly maintained on a regular basis to ensure optimal performance and reliability. Regular cleaning and lubrication of the contacts, as well as regular switching cycles are important for ensuring the safety and longevity of the switch.

The 12HR43-4 switch is a simple and reliable device, designed for use in a variety of applications. Its limited range of control and regular maintenance requirements make it suitable for a wide range of applications. It is an excellent choice for controlling a variety of electrical and mechanical systems.

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