D.C. RELAY - SUMITOMO ELECTRIC INDUSTRIES

Title:

D.C. RELAY

Document Type and Number:

Japanese Patent JP2005019184

Kind Code:

A

Abstract:

To provide a D.C. relay having a simple structure and capable of surely cutting off a D.C. high voltage without fusing a contact.

This D.C. relay is provided with a pair of contact couples which contact to and separate from each other and at least either of which is a moving contact. Each of contact parts 11a, 21a, 31a and 31b of the contacts is formed of a Ag alloy of a chemical composition containing 1-9 mass% of Sn and 1-9 mass % of In, has a first layer of a surface and a second layer of the inside. Micro Vickers hardness of the first layer is not lower than 190; micro Vickers hardness of the second layer is not higher than 130; and the thickness of the first layer is set in a range of 10-360 μm.

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Inventors:

IMANISHI HIROYUKI
ARIYOSHI TAKESHI
YOSHIMURA AKINOBU

Application Number:

JP2003182074A

Publication Date:

January 20, 2005

Filing Date:

June 26, 2003

Export Citation:

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Assignee:

SUMITOMO ELECTRIC INDUSTRIES

International Classes:

H01H9/32; H01H1/02; H01H1/023; H01H1/04; H01H9/40; H01H9/44; H01H50/00; H01H50/54; (IPC1-7): H01H50/54; H01H1/02; H01H1/04; H01H9/32; H01H9/40; H01H9/44; H01H50/00

Attorney, Agent or Firm:

Hiroshi Yamano
Hidemi Aoki

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