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Snap Action, Limit Switches

The D5F-H003 is a snap action, limit switch suitable for a variety of applications. The switch’s application fields include safety switches, emergency-off switches, and position switches. The switch is a three-pole normally open/normally closed/changeover contact design, making it an ideal choice for use in safety circuits, where contacts must be positively opened before the circuit can be enabled again.

Working Principle

When the actuator lever of the switch is moved, the mechanism inside the switch stimulates a snap action which causes the contact poles to be depressed and the contacts to be opened or closed. Then the mechanisms’ spring, which is designed to be able to maintain a stable contact, rapidly returns the contact poles back to their original position, the contact poles can still be depressed, but the contacts remain open or closed.

A contact spring load is also built into the switch to ensure a quick and reliable action of the contact polar, which is essential for the switch to provide a fast response time. Once the lever has been released, the contact spring load springs back and the contact poles retain their original positions.

Features

The D5F-H003 switch provides several features that makes it ideal for use in a variety of applications, including:

• High reliability: the contact spring and the mechanism design inside the switch ensures a reliable performance
• Positive action: the contacts can only be positively opened before the circuit can be enabled again
• High dielectric strength: the contacts have an operating temperature of -40°C to 125°C and a rated voltage of 250VAC/50VDC.
• High mechanical life: the switch has an operating life of up to 100,000 cycles.
• Compact size: the switch measures just 28mm x 20mm x 8mm

Conclusion

In conclusion, the D5F-H003 switch is an ideal choice for use in safety circuits, where contacts must be positively opened before the circuit can be enabled again. The switch provides high reliability and long-term economics and offers high dielectric strength and mechanical life. Its compact size and easy installation make it perfect for applications in limited spaces such as closets, equipment racks, and other confined spaces.

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