Abstract: A contact arm assembly is provided having an electrical contact for making and breaking an electrical current, a contact arm for supporting the electrical contact, and a bond surface on the contact arm that is conditioned for improving the bond between the electrical contact and contact arm. Also provided is an electrical circuit breaker that utilizes the improved contact arm assembly. The bond surface of the contact arm is provided with pyramid-shaped serrations that serve to more uniformly distribute the electrical current during brazing, provide multiple areas of localized current constriction during brazing, and provide collector pockets for accumulating the molten braze alloy during brazing. The uniform distribution of electrical current during brazing serves to generate a uniform temperature gradient across the braze area for uniform melting of braze alloy.