SW3821

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Rocker switches are composed of movable pieces that are attached to a metal plate. They are used to control the direction and speed of a motor, or to toggle between two electrical circuits. SW3821 is one of the most popular rocker switches used in industrial, commercial and residential applications. This article will discuss the application fields and working principle of the SW3821 rocker switch.

The SW3821 rocker switch is commonly used to control either a single-phase or a three-phase motor. In electric vehicles such as golf carts, electric scooters, and EVs, it is used to switch between different gear positions. It is also used to control variable speed motors, such as those in pool pumps, fans, and HVAC systems. Moreover, it is sometimes used in lighting applications, to switch between light levels, or to switch between on and off positions.

The SW3821 is a single pole double throw (SPDT) rocker switch with an internal current rating of 16A. It has a solid contact and off structure, meaning that it is normally open when in the off position, and closed when in the on position. The switch has a maximum voltage rating of 250VAC/30VDC, and can be connected to any two terminals via the screw or solder tabs. Furthermore, it requires minimal mounting space due to its compact and slim shape.

In operation, the SW3821 rocker switch is typically actuated by the user pushing the switch lever in one direction or the other. As the lever slides from the off position to the on position, the electrical current is directed from one terminal to the other. Depending on the configuration of the wiring, the switch can be configured to control the power of the motor, the speed of the motor, or the direction in which the motor moves. This makes it an incredibly versatile and useful rocker switch.

The SW3821 rocker switch is also durable and reliable, making it suitable for use in a wide variety of industrial, commercial, and residential applications. Its snap-in construction allows for easy installation, and its contact construction ensures that it is able to endure high current flows without sparking or arcing. Furthermore, it is UL, CSA and VDE approved, making it suitable for any environment where safety is a priority.

In conclusion, the SW3821 rocker switch is an incredibly versatile and durable switch with a wide range of applications. It is mainly used to control motors, lighting, and other electric circuits, and due to its small size, it requires minimal space for installation. Furthermore, its contact construction ensures that it is able to endure high current flows without any issues, and it is UL, CSA and VDE approved for safety. All these features make the SW3821 an ideal rocker switch for any application.

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