If your switch moves in only two positions, look for 2T (or DT). If it switches one circuit, it's 1P or ST. If two circuits, it's a 2P or DP. A switch with two positions and two sets of contacts is usually refered to as a DTDP switch. Switches are also rated by voltage and current limits on the contacts. If yours is rated 250V and 10A, get a part that meets or exceeds that.