D4F-202-3R

Ingress Protection:	IP67 - Dust Tight, Waterproof
Mechanical Life:	10,000,000 Cycles
Electrical Life:	150,000 Cycles
Operating Position:	1.156" (29.4mm)
Operating Temperature:	-30°C ~ 70°C
Overtravel:	0.125" (3.2mm)
Differential Travel:	--
Pretravel:	0.047" (1.2mm)
Release Force:	153gf
Operating Force:	1224gf
Features:	Cable Length 3m
Series:	D4F
Termination Style:	Cable Leads
Mounting Type:	Chassis Mount
Actuator Type:	Roller Plunger
Voltage Rating - DC:	125V
Voltage Rating - AC:	120V
Current Rating:	15A (AC), 550mA (DC)
Switch Function:	On-Mom
Circuit:	DPST-NC
Part Status:	Active
Packaging:	Bulk

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Introduction

Snap action limit switches are commonly used in a variety of applications where a mechanical device is used to detect when an object has been moved, or a limit position has been reached. The D4F-202-3R is a compact a snap action limit switch designed for applications where space is at a premium. This article will provide an overview of the D4F-202-3R switch, including a description of its application field and working principle.

Application Field

The D4F-202-3R switch is ideally suited for applications where the switch needs to be mounted in confined spaces with restricted working room. The housing measures just 22mm across, and has been designed with a simple, modern yet robust construction, ensuring reliable operation. As this particular switch is a snap action model, it is suitable for detecting rapid and intermittent movement, as it is able to mechanically open and close the contact with minimal force.Due to its small size, the D4F-202-3R switch is suitable for applications where machine space is limited, or the switch needs to be concealed from the visible surface. The switch is also highly reliable, making it a popular choice for devices requiring circuit protection and prolonged service life.

Working Principle

The D4F-202-3R switch utilizes a lever-equipped actuator, which is connected to the contact assembly by a link. When the actuator is pressed either mechanically by a moving object, or electronically by an actuator element, the link turns and opens or closes the contacts. The contacts of the D4F-202-3R switch are made of a gold alloy, and are firmly secured in a precision molded block.The link is designed to absorb the initial shock of actuation, preventing the contacts of the switch from bouncing and resulting in false readings. The link is also designed to ensure the contacts of the switch remain correctly coupled to the actuator, providing reliable operation.

Conclusion

The D4F-202-3R switch is a compact, reliable, and highly reliable limit switch suitable for applications where space is at a premium. This particular switch utilizes a lever-equipped actuator and precision molded contacts to ensure reliable operation even in rapid, intermittent movements. The switch is a snap action model, and is suitable for both visible and concealed work surfaces, as well as for circuit protection applications.

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