A circuit interrupter having a housing within which components of the circuit interrupter are contained, the circuit interrupter comprising: a line terminal connectable to a source of electrical power; a load terminal connectable to a load; a stationary contact being mounted in a fixed fashion with respect to the housing ; a moveable contact arm having a first end and a second end, said moveable contact arm having a moveable contact positioned on the first end and being pivotably connected at the second end with respect to an axis (A), said moveable contact configured to be pivotable into and out of physical contact with said stationary contact by pivoting of said moveable contact arm about the axis (A); wherein, when said moveable contact and said stationary contact are in physical contact, said line terminal and said load terminal are in electrical communication, and when said moveable contact and said stationary contact are out of physical contact, said line terminal and said load terminal are electrically isolated from one another; wherein said moveable contact arm defines a pivot angle with respect to said housing as said moveable contact arm pivots about the axis (A); and a biasing member exerting a biasing force on said moveable contact arm which pivotally biases said moveable contact toward said stationary contact when the pivot angle is less than a zero-bias angle and which pivotally biases said moveable contact away from said stationary contact when the pivot angle is greater than a zero-bias angle; characterised in that said biasing member comprises a tension spring having a first end connected to a point fixed with respect to said housing and having a second end connected to said moveable contact arm . a line terminal connectable to a source of electrical power; a load terminal connectable to a load; a stationary contact being mounted in a fixed fashion with respect to the housing ; a moveable contact arm having a first end and a second end, said moveable contact arm having a moveable contact positioned on the first end and being pivotably connected at the second end with respect to an axis (A), said moveable contact configured to be pivotable into and out of physical contact with said stationary contact by pivoting of said moveable contact arm about the axis (A); wherein, when said moveable contact and said stationary contact are in physical contact, said line terminal and said load terminal are in electrical communication, and when said moveable contact and said stationary contact are out of physical contact, said line terminal and said load terminal are electrically isolated from one another; wherein said moveable contact arm defines a pivot angle with respect to said housing as said moveable contact arm pivots about the axis (A); and a biasing member exerting a biasing force on said moveable contact arm which pivotally biases said moveable contact toward said stationary contact when the pivot angle is less than a zero-bias angle and which pivotally biases said moveable contact away from said stationary contact when the pivot angle is greater than a zero-bias angle; characterised in that said biasing member comprises a tension spring having a first end connected to a point fixed with respect to said housing and having a second end connected to said moveable contact arm . <EOS>