高質(zhì)量的-Contactor AC/DC-銷售

On the marketContactor AC/DCThere are various forms, styles, and techniques. Based on your application, only one type of relay may be suitable. In other cases, multiple types of relays may be suitable. By understanding the advantages and disadvantages of different relays, you should be able to choose the relay for your current job.

Although many conclusions in this document apply to all contactor AC/DC applications, it specifically discusses the factors to consider when using different types of relays on switch modules for automatic test equipment (ATE) applications. The comparison made here is between relays with similar voltage, current, and power ratings, whose form factors can be found in typical switch modules.

The common types of relays used in ATE applications are:

Electromechanical relay

Dry spring relay

Solid state relay

Field-effect transistor switch

These are typically used in applications where relays must switch back to a safe state in the event of a power outage. The latch relay uses permanent magnets to keep the armature in its current position, even when driven by current from the coil. For very low voltage applications, lockout relays are used because the lack of coil heating may affect the measured thermoelectric potential (EMF).

接觸器交直流It may be a widely used relay in ATE applications today. They are composed of coils, armature mechanisms, and electrical contacts. After the coil is energized, the induced magnetic field will move the armature, thereby opening or closing the contacts.Although electromechanical relays are limited in terms of packaging size, switching speed, and mechanical lifespan, they still provide a great all-round solution.

The contacts on contactors for AC and DC are often larger and more robust than some other relay types. Larger contacts enable them to withstand unexpected surge currents caused by parasitic capacitance present in circuits, cables, etc. Unfortunately, larger contacts require larger packaging sizes, so they cannot be densely placed on the switch module.

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