U21J51ZQE12

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U21J51ZQE12 Application Field and Working Principle

Rocker switches are a type of switches that are characterised by the translation motion of an actuator, usually a "rocker", to operate a circuit breaker. They are used in a variety of electrical applications, including wall switches and computer keyboards. U21J51ZQE12 is a model of a rocker switch and this section will discuss its application field and working principle.

Application Field

U21J51ZQE12 is a particular model of rocker switch, with a 10A at 125/250VAC rating and a UL approved rating. It is often used in wall switch plates, as wall light switches, dimmer switches and loopswitches are the most common type of rocker switch. They are also widely used in computer keyboards, usually for the function key.

Working Principle

The operating principle of a rocker switch is an mechanical one. As the actuator, which is usually a flat rocker shaped piece, is translated from its equilibrium position, the metal contacts inside the switch open and close. This change allows the current to flow in the circuit, enabling the device or appliance to be switched on and off.

The metal contacts are usually connected to poles, and the number of poles indicates how many circuits the switch can control. In the case of U21J51ZQE12, it is a common single pole switch, which only controls one circuit.

Conclusion

In conclusion, the U21J51ZQE12 model of rocker switch is a 10A at 125/250VAC rated switch, approved by UL. It is used in wall switch plates and in computer keyboards, and it can control one circuit. The working principle is an mechanical one and it involves the translation of an rocker actuator, which in turn opens and closes the metal contacts in the switch, allowing current to flow.

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