D4NL-1EFA-B4

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Snap action, limit switches are electromechanical components used to detect the presence or absence of an object or take action when the state of a certain system has changed. Known as ‘snap’ or ‘pull-to-position’ switches, they act as actuators – their purpose driven by the mechanical energy they store in their arms.

D4NL-1EFA-B4 switches are a type of snap action switches that employ two or more electrical contacts actuated by a plunger or lever. When the switch is pressed, either directly or by an external force, its contacts close and, when released, they open. Its contacts can also be opened and closed different times without risk of damage as they are protected against pressure and vibration.

D4NL-1EFA-B4 switches are primarily used in automotive, medical device and consumer electronics applications. In automotive electronics, they are used to signal the presence of an object or a situation that needs to be addressed. They can detect the presence a car seat occupant, a bumper in the wrong position or an open door. In medical device applications, they are used to signal the presence of something that needs to be monitored, such as a patient’s heart rate or blood pressure. They can also be used in consumer electronics applications, such as monitoring the presence of a water bottle or an electronic device that needs to be monitored.

The mechanisms behind D4NL-1EFA-B4 switches involve a two or three lever-type design. The design is based on a spring system where the movement of the plungers is linked to the movement of the levers. The levers in turn produce the electrical contact when in contact with a stationary contact assembly. These contact assemblies are designed to break contact when the switch is pressed, or to make contact when the switch is released. The levers are also designed to stay in the same position when the switch is pressed, allowing an extremely consistent operation.

In addition to its snap action principle, the D4NL-1EFA-B4 switch also features an overload protection system. This system prevents the switch from becoming over-stressed, which can lead to breakage. This overload protection system also prevents the contacts from becoming loose or improperly secured.

The D4NL-1EFA-B4 switch is a reliable, cost-effective solution for monitoring objects or situations that require a fast response time. Its versatility and durability make it suitable for a variety of applications, and its contact protection system ensures that it can withstand the rigors of everyday use.

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