1478669-5

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Snap action, limit switches are recognizable due to their distinct design and their capability of performing extreme operation in short periods of time, as they get easily activated by mechanical stress or pressure when they close. 1478669-5 switches, also known as limit switches, use the same working principle, but with a somewhat different appearance, being considered a miniature, low-profile switch that fits in tight spaces.

These miniature snap action switches are designed to prevent damage or accidents while controlling machine operations when an unexpected situation occurs. When an emergency stop arises, these switches activate and immediately shut the machine down, or switch off certain parts of the tool or machinery.

During normal operation, the electrical contacts are inactive. The moment the switch is activated by a mechanical force, however, the contacts will form a connection with each other, as one contact will act as a trigger, activating the switch. In some cases, this is caused by physical contact between the contact points; in others, the contacts will open and close when the force reaches a certain level.

Typical 1478669-5 switches are rated for a UL-10E voltage of 125VAC and 5A, with a 0.5A minimum and a 6A maximum rating. As for the operation tempo, these switches can be activated normally four times per minute, and up to 400 times per minute during pulse operation. Both the range and the sensitivity of these switches can be modified via an adjustable arm and/or roller.

In terms of materials and durability, 1478669-5 switches are made from UL94-HB rated plastic, featuring a corrosion-resistant finish and a medium-short life. As for the actuator, these are usually made of nylon and nylon-covered metal for improved durability and performance. This material is both OEM and RoHS compliant.

The following is an example of how these switches can be used during normal operations:
A metal cylinder passes right next to a 1478669-5 switch, stretching a tightly stretched spring-loaded metal arm attached to the switch. As this spring arm deforms, a metal roller mounted on top of the arm is pushed towards the electrical contacts of the switch, triggering it and immediately changing the state of the mechanical operation. When the metal cylinder leaves the proximity of the switch, the spring returns to its original shape and the metal roller moves away from the contact points, restoring the switch’s original state.

Depending on the type of switch, the roller feel may be adjustable, allowing for different levels of tightness to trigger the switch. 1478669-5 switches often have a little knob to adjust this sensation. It can also be used to adjust the amount of force necessary to trigger the switch.

In summary, 1478669-5 switches are miniature limit switches capable of performing extreme operations in very short periods of time. These switches are used to control machine operations and protect against unexpected damage or accidents, being triggered by mechanical force or pressure. The contacts of the switch are normally inactive, but when the switch is activated, they form a connection, thus changing the state of operation. Furthermore, the switch is made from UL94-HB rated plastic and its actuator is usually made of nylon or nylon-covered metal. Finally, the roller’s feel can be adjusted according to the desired tightness or force needed to trigger the switch.

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