DC HIGH VOLTAGE RELAY AND CONTACT MATERIAL FOR DC HIGH-VOLTAGE RELAY
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United States of America Patent
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Issued Date -
Jan 14, 2021
app pub date -
Mar 12, 2019
filing date -
Mar 16, 2018
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A DC high-voltage relay including at least one contact pair including a movable contact and a fixed contact, having a contact force and/or opening force of 100 gf or more, the DC high-voltage relay of 48 V or more. The movable contact and/or the fixed contact includes Ag oxide-based contact material. Metal components in the contact material includes at least one metal M essentially containing Sn, and a balance including Ag and inevitable impurity metals. The content of the metal M is 0.2% by mass or more and 8% by mass or less based on the total mass of all metal components in the contact material. The contact material has a material structure in which one or more oxides of the metal M are dispersed in a matrix including Ag or a Ag alloy. As metal M, In, Bi, Ni and Te can be added.
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