D4F-402-5D

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Snap action, limit switches are devices designed to detect when a physical parameter, such as position or force, has reached or exceeded a specific threshold. When that threshold is met, the switch’s electrical contact either opens or closes, depending on the type of switch. The D4F-402-5D is a two-contact snap action limit switch suitable for a wide range of applications.

Overview of D4F-402-5D Switch

The D4F-402-5D is an electromechanical snap-action limit switch. It features an operating force of 1 to 5 N and a switch travel of 4.5 mm. Long operating life and excellent responsiveness are some of its distinctive characteristics. The D4F-402-5D is designed to operate within a temperature range of -25 to +85°C. The switch is rated for action resistance of 200 mA at 15 V and a minimum insulation resistance of 100 MΩ.

The D4F-402-5D is constructed with an actuator/lever and fixed contact that is connected to the body of the switch with a flexible tube. The function of the flexible tube is to bridge the gap between the switch body and the contact point. This allows the switch to respond to various external loads while maintaining its sensitive operation.

Application Fields

The D4F-402-5D is widely used in multiple applications, including:

• Temperature monitoring
• Electrical motors and pumps
• Robotics
• Heating and air conditioning systems
• Industrial automation
• Industrial process control
• Label sensing

Working Principle

The D4F-402-5D switch is an off-on switch that relies on the physical actuation of the actuator lever to detect when a threshold has been reached or exceeded. The switch operates within a preset hysteresis—an effect that powers the opening or closing of the switch depending on whether the threshold is reached or exceeded in either direction.

When the threshold value is exceeded, the actuator lever mechanically pushes the switch’s internal contacts. This creates a tiny electrical current flow between them, which is strong enough to actuate the switch. The current flow is then redirected based on the configuration of the switch contacts. This causes the switch to either open or close, depending on the circuit it is connected to.

The switch\'s hysteresis is designed to be predetermined, which helps prevent unnecessary actuations from external vibrations or minor fluctuation in the measured parameter.

Advantages

The D4F-402-5D is an ideal choice for applications that require a highly reliable and precise limit switch. Some of its advantages include:

• High-quality materials for reliable operation in challenging environments
• Two-contact configuration for safe, redundant operations
• Broad operating temperature range
• Low operating force and hysteresis
• RoHS compliance

The D4F-402-5D is a reliable, affordable, and highly accurate limit switch. When used with other components, such as a relay or a transformer, it can provide an efficient, cost-effective solution for many industrial and commercial applications.

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