Electric Switches & Electric Switch Manufacturers
Electric switches are, simply put, components that can open or close an electrical circuit. They were invented some time ago, born out of a need to safely and easily control the flow of electricity. While small and quite simple, electric switches are an important part of the modern world. People use them constantly, whether to turn on the bathroom light at night or to control machinery in high-risk industrial environments. Generally speaking, if an electrical circuit is open, that means it is not connected, disallowing a current transmission, while if it is closed, it is connected and it allows current to pass through. Switches that work like these are known as binary devices, a name that reflects their two states. There are other switches, though, that allow varying voltages to pass through via multiple closed positions that alter the output of that to which they are attached.
Electric switches vary from one another in a variety of ways, but most are made up of conducting materials, wires, actuators, and terminals. Switch conducting materials must be corrosion resistant because metal corrosion results in the buildup of insulating oxides that inhibit proper switch function. Conducting materials are also selected for abrasion resistance, mechanical strength, low toxicity, and, ideally, low cost. An actuator is a moving part that serves switch function by applying operating force. Actuators, which are housed in a protective casing, may come in the form of any number of mechanical linkages; most commonly, an actuator is a toggle or dolly, a rocker, or a push-button. A terminal is the point at which an electric conductor connects to external circuits. It may be the standalone end of a wire or it may be fitted with a fastener or connector. All of the above components differ in configuration and quantity from one switch to another. For example, some switches are made quite small and require a miniature tool, like an inkless pen, to be accessed. Others need only the flip of a finger, while others still require special strength. Also, while many switches operate independently, they can also be connected to each other so as to increase circuit options. What’s more, electric switches can also be quite diverse in terms of their intricacy. They range from the simplest operation, requiring a physical touch between the actuator and conductors, or they may be able to open and close by sensing a magnetic field or light.
Some Leading Manufacturers
Stamford, CT | 203-327-7300
As an ISO certified manufacturer, Amphenol Nexus Technologies is your source for high quality electric switches and electronic components. With more than 50 years of experience in the industry, you can count on us to satisfy all of your electric switch needs with expertise and efficiency. We are your partner when it comes to developing the right product and solution, and we will work with you to create the perfect solution for you! Contact us today to see how we can serve you!
Waukegan, IL | 800-927-5292
With a reputation for exceptional customer service and reliable, high quality electronic components, Yaskawa America is the premier manufacturer of electric switches. We specialize in the manufacture of proximity, push-button, and limit switches, and our Bestact™ reed switches are some of the most reliable and functional switches on the market. We are confident that we can find the right solution for you at the right price. Check out our website or call for more information!
Eden Prairie, MN | 800-806-6113
Douglas Corporation designs and manufactures all kinds of custom electronic switches. We take pride in the quality of our work, so we test every product for full circuit functionality before shipping. Our experienced engineers and design team are always ready to work with you to create a custom solution for your exact applications. Call us today to discuss your electric switch requirements!
Shelton, CT | 203-951-4600
Since 1947, EAO Switch has been a family-owned manufacturer of high quality industrial switches and electronic control interface systems. We design and manufacture a diverse range of electric switches, including pushbuttons, emergency stop switches, sector switches, key-insert switches, lever switches, toggle switches, and more. EAO Switch is your solution-focused expert and partner, so visit our website to submit a request for quote or give us a call!
Hillsboro, OR | 800-638-0801
As a leading electrical component manufacturer and supplier, MagneLink is your source for reliable and cost effective magnetic switches. We manufacture several different types of magnetic switches, including our Triac AC voltage switch, Transistor DC voltage switch, Reed light load switch, Hall sinking/sourcing switch, and coded switch. With a MagneLink switch, you extend the life of your switches and reduce costly downtimes. So connect with us today!
South El Monte, CA | 888-442-7180
Here at Electro-Mech Components, we have been manufacturing electric switches and electronic components since 1966. Let us put our experience to work for you! We specialize in the design and manufacture of illuminated pushbutton switches, multi-switch interlocking assemblies, and indicator lights. For quality products and exceptional service, we guarantee 100% customer satisfaction! Give us a call or visit our website today!
GOT Interface LLC
Types of Electrical Switches
Below are brief descriptions of some of the more popular and more commonly used electrical switches:
Toggle switches are used to control the flow of electrical power to a device by toggling to one of two or more different positions. The most basic toggle switches simply toggle between off and on, but some more complex toggle switches may have more than two positions. The switch is most commonly comprised of a lever or handle, which is used to switch between the different positions, and an internal spring keeps the lever held tightly in place at each of its set positions. These switches can be used for applications ranging from controlling household lights to industrial machinery, and many switches can handle switching 250 VAC at currents around 1 amp.
Push Button Switches
Push button switches allow for two-position control, which is activated through the pushing of a button. Pushing the button “in” provides a connection in the internal circuit therefore turning on the device to which the switch is connected. A spring within the switch always pushes the button toward its “out,” or off, position, so once the button is released the circuit loses connection, turning off the device. This is especially useful for applications requiring only brief connection or momentary electrical input.
While many other electrical switches are activated by flipping a lever or pushing a button, rotary switches are activated by rotating a knob. This kind of switch is typically used for applications requiring more than just on and off options since they can be rotated to a variety of different positions. Due to this feature, they allow one point to be connected to one of many different points within an electronic circuit. These switches come in a variety of forms, including rotary switches consisting of three levels all connected to a common shaft.
As its name suggests, a proximity switch is activated as it senses an object coming near it. These switches are typically utilized in machinery, and they use magnetic and high frequency electromagnetic fields to sense metallic machinery components as they approach the switch location therefore triggering the switch to close. This effect is accomplished by energizing a coil of wire with a high frequency current, which is then monitored. The approach of a metallic object or component causes the current in the coil to increase, triggering the switch. Not all proximity switches use this mechanism, however. Some instead use an optical mechanism, which utilizes photocells that monitor incoming light. In this case, the switch is triggered when the incident light is blocked or interrupted.
A speed switch monitors the rotational motion and speed of a shaft or other rotating component, and once the speed of the component reaches a set point, the control circuit is switched or energized. The speed switch can monitor the shaft speed in a variety of ways, including a centrifugal weight mechanism, magnetic pick-up mechanism, or optical mechanism.
Temperature switches utilize a strip of bimetallic materials, which is a strip comprised of two metals with differing thermal characteristics combined back to back. Specifically, these metals must have a dissimilar coefficient of thermal expansion. When the strip is heated or cooled, this difference causes the strip to bend one way or the other, and this bending can be used as a contact mechanism. The strip can be oriented in such a way as to make the strip bend and make contact with the circuit when heated and bend away from the circuit when cooled, or vice versa.
Like a toggle switch, a joystick is controlled by a lever. However, the lever in a joystick switch can move in more than one axis, allowing for a larger number of control options. These switches typically contain many contact mechanisms which are not only stimulated by the direction of the lever, but also by how far the lever is pushed in a certain direction. This kind of switch is commonly used in motion control devices and offers both course and fine control.