D4N-1220

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Snap-action switches, also known as limit switches, are electromechanical devices that turn a circuit on or off when physical parameters, such as pressure, temperature, or position, reach a certain level. The D4N-1220 is a type of snap-action switch with the capability of triggering a circuit’s action when a predetermined level of mechanical force is applied. These switches are used to detect information and convert them into electrical signals. They are adept at measuring incremental or sudden physical changes, as well as movement in different directions.

The D4N-1220 is a subminiature, low-profile, single-pole single-throw (SPST) type of switch. It has a creepage distance of 4mm, an electrical rating of 5A at 250VAC, and is generally rated for a mechanical life of up to 200,000 cycles. The D4N-1220 is highly resistant to dust, oil, water, and humidity, and its operating temperature range is from -55 to +85 degrees Celsius. Certain models also come with an IP67 certification for water-resistance.

The primary components of a snap-action switch are the actuator, a contact block, and a return spring. The actuator is a cap-like dome that is attached to the contact block. When the user applies a mechanical force, it causes the actuator to push the contact block, which ultimately triggers the circuit’s activation or deactivation. The return spring is responsible for resetting the switch to its original position after the external force is removed.

The D4N-1220’s contacts are set up in an SPDT configuration, which gives it the ability to detect movement, at two different directions. The actuator has two independent springs that control the rate of switching and movement, both in the same and in different directions, which gives it a precise response time. The actuator also has a pressure-sensitive feature, which ensures that the switch will respond swiftly to minimal pressure variations. It also has a set of auxiliary contacts, which allow it to detect further physical conditions.

The D4N-1220 can be used in a variety of applications, including industrial automation, automotive, commercial, and residential. They are particularly well-suited for applications that require precise movement and pressure detection, such as crane systems, conveyor belts, access control systems, and door switches. The switch’s dust, oil, and humidity resistance, combined with its long-term durability, makes it suitable for use in harsh environments.

The D4N-1220 snap-action switch is an effective and reliable means of detecting and responding to mechanical force, and its wide range of applications make it a worthwhile investment. By employing precision components and setup, it provides a reliable and versatile solution that can improve any application.

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