Patent ID: 7012492

Claim:
A contact construction for DC loads comprising: a stationary contact and a movable contact that are opposite to each other; and a magnetic unit which applies a magnetic field acting in a direction orthogonal to a moving direction of the movable contact, to a space in which both contacts exist, one of the stationary contact and the movable contact being used as an anode-side contact, and the other being used as a cathode-side contact, wherein the anode-side contact is made of an AgSnO 2 -based alloy which contains at least Ag and SnO 2 , and the cathode-side contact is made of one of an AgNi-based alloy which contains at least Ag and Ni and an AgCuO-based alloy which contains Ag and CuO, and wherein the AgNi-based alloy contains 8–12 wt. % Ni.