Contact Point Protection Loops

It is suggested that when using the relay to switch between inductance loads (such as relays, diodes), the contact point protection loops listed in following diagrams should be used to protect against malfunctions of the contact points (for example, upper and lower contact points sticking together) caused by electrical arcs, and to increase the reliability of the contact and the longevity for use. Please note that the use of contact point protection loops will increase the open time of the relay...

There are two important factors to affect the action frequency of the relay, which are different type of load, and special surge current...
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