21HE9-RB1

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Snap action, limit switches are common and essential elements in the control systems. They provide play a vital role in providing feedback to the system it is a part of.

The 21HE9-RB1 is a type of snap action, limit switch with a variety of applications. It is a single-pole, double-throw switch with a plastic case and metal contacts.

Application Field

The 21HE9-RB1 snap action switch is used in a wide array of applications, although its most common use is in industrial equipment. It has the capability to power and control low and medium-voltage systems in the industrial and commercial markets. The well-defined contact positions associated with the 21HE9-RB1 make it an ideal choice for use in a variety of applications. It is also applicable in controlling motor speeds and as a way to increase the precision of production line activities.

Working Principle

The 21HE9-RB1 snap action switch makes use of contact manipulation, meaning that it uses a magic arm or levers to make and break the circuit. When the contact lever is pushed by an external force, the contact points which are set on the lever are bound together, allowing electricity to pass freely. With the lever in this position, the system is often said to be in the “on” state. When external force is removed from the lever, it automatically reverts back to its original position, breaking the circuit and hence this is termed as the “off” position.

The switch uses a coil spring connected to the lever which takes hold of a snap-acting mechanism. When the external force is applied, it stores all the energy in the spring and when the external force is removed, the spring releases the stored energy and the lever moves to its original position. This acts as a protection against any external shocks, ensuring that the 21HE9-RB1 stays in the right state.

Advantages of 21HE9-RB1 Snap Action Switches

The 21HE9-RB1 snap action switch has many advantages such as its low cost, low contact resistance, upper and lower temperature range, large contact gap and reliable contact force. It is also small, lightweight and easy to install. This switch is resistant to shock, vibration and high temperatures. The 21HE9-RB1 is designed with an exceptionally low contact resistance, providing for accurate and consistent switching.

The 21HE9-RB1 is also suitable for a variety of environments and applications. Additionally it has a large contact gap and a high reliable contact force, making it resistant to dust and mechanical wear, as well as electrical noise and other hazardous and damp environments.

Conclusion

The 21HE9-RB1 snap action switch is an essential element of many industrial control systems. It is a reliable and low-cost switch capable of taking the strain out of many processes. Its ability to maintain a steady and reliable contact resistance makes it an ideal option in a variety of applications. The switch is resistant to shock, vibration, dust, and other external influences, making it a superior choice for use in many different types of systems.

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