E921KC

Pushbutton switches are a type of manually operated off-and-on switch used to control electrical equipment. These switches are generally divided into two categories: momentary action and maintained action telephone-style buttons. E921KC pushbutton switch is a type of maintained action switch that allows electrical contacts to open and close circuits to control on and off functions in a system.

Applications

E921KC pushbuttons are designed for applications where extremely precise stability of contact resistance is required, such as medical and military equipment. These switches are also commonly used in automobiles as well as in industrial applications. In addition, the switches are used in telecom communication, electronic equipment, railway and navigation equipment, etc.

Working Principle

The E921KC pushbutton switch consists of two connected metal plates separated by a plastic or hermetically sealed metal dielectric. When the button is pressed, an electrical contact between the plates is established, allowing current to flow through the circuit. When the button is released, the plates separate and the electrical contact is broken. The switch is designed with a feature called "large contact gap." This means that when a voltage is applied to the metal plates, the gap between the plates increases slightly and this allows the electrical contact to be re-established. This feature is beneficial because it prevents accidents caused by short-circuiting the switch.

The E921KC pushbutton switch also has an electrical contact gap adjustment feature which allows the adjustment of the contact gap to ensure that the switch operates safely. The contact gap must be adjusted periodically to ensure that the switch can handle the maximum load that it is designed for. Adjustment of the contact gap is also important for preventing arcing of the electrical contacts which can cause damage to the switch.

Conclusion

The E921KC pushbutton switch is an ideal choice for applications where precise stability of contact resistance is needed. It has several features that make it a reliable and safe choice for controlling on-and-off functions. It also offers adjustment of the contact gap to ensure that it can handle the maximum load it is designed for.