DC high voltage relay and contact material for DC high-voltage relay

A DC high-voltage relay, comprising:

• a drive section which generates and transmits a drive force for moving a movable contact;
• and a contact section which performs switching of a DC high-voltage circuit, wherein
• the drive section comprises an electromagnet or a coil which generates a drive force;
• a transmission unit which transmits the drive force to the contact section;
• and a biasing unit which biases the transmission unit for closing or opening a contact pair,
• the contact section comprises at least one contact pair including a fixed contact and a movable contact which is moved by the transmission unit of the drive section;
• and at least one movable terminal bonded to the movable contact and at least one fixed terminal bonded to the fixed contact,
• the DC high-voltage relay has a rated voltage of 48 V or more,
• the contact pair has a contact force and/or opening force of 100 gf or more,
• the movable contact and/or the fixed contact comprises a Ag oxide-based contact material,
• metal components in the contact material comprise at least one metal M essentially containing Sn, and a balance being Ag and inevitable impurity metals,
• the contact material has a content of the metal M being 0.2% by mass or more and 8% by mass or less based on a total mass of all metal components of, and
• 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.