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Can we use LC1D contactor for 24V DC power switching application? What is the current rating possible to switch with DC load and how to connect the DC load?

In DC application, LC1D contactor can be used up to 300VDC. But depending upon the DC voltage level, the maximum current rating is limited. In LC1D contactor range, the operational current is different for different voltage & pole used in the contactor specification. This all kind of tested data are given in the catalog. You can refer the attached catalog page for the same. 

For example if you are talking about the LC1D18*** contactor, at 24V DC the maximum current rating is 25A. The connection of 1/2/3/4 pole contactor also shown in the attachment.
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