Mechanical Considerations For Selecting Materials For Push-button Terminal Connectors

The performance of push fit terminal block connector is based on the choice of its core materials, and high-strength metals or alloys are a common and necessary selection criterion. Brass, due to its excellent conductivity and machinability, is the mainstream base material, and its strength grade directly affects the terminal's ability to withstand wire crimping forces and long-term clamping forces. Higher-strength phosphor bronze is used in applications requiring cyclic stress or vibration environments, and its fatigue resistance is superior to ordinary brass.

Cold forging significantly improves the strength of the metal material. Precision-forged terminals have a dense structure, improved microstructure, and a significantly higher yield strength than stamped parts. This difference in process directly reflects push connector block's ultimate ability to withstand mechanical strain. Surface plating is an extension of the material system. Tin or silver plating primarily protects the conductive interface, while the nickel underlayer acts as a crucial mechanical barrier, improving plating adhesion and resistance to fretting wear. Insufficient plating thickness may increase the risk of oxidation, weakening connection reliability.

Material selection must precisely match the mechanical stress spectrum of the application environment. Professional manufacturers conduct material certification tests based on terminal structure dimensions, service vibration levels, and insertion/removal cycles, providing mechanical performance data that meets industry standards. This materials science-based selection process is the fundamental support for the long-term stable operation of the push wire terminal block.