Why Are Gold-plated Treatments Often Used For High-end Push-in Terminal Blocks?

In the design of push in connector block, frequent insertion and removal occur. After repeated insertions and removals, if the metal surface of push in terminals with clamping screws is treated with ordinary tin or nickel plating, oxidation or slight wear can easily occur at the contact surface, potentially leading to increased contact resistance and unstable signal transmission. In contrast, gold-plated contact surfaces are extremely resistant to oxidation and wear from repeated insertions and removals.

For systems requiring high reliability, signal stability, or resistance to environmental changes, gold plating on push in wire terminal block maintains low and consistent contact resistance. This treatment is particularly important in environments with prolonged use, frequent insertions and removals, or potential exposure to moisture and airborne oxides.

Furthermore, to improve the adhesion between the plating on push wire terminal block and the substrate, a nickel undercoat is typically applied before gold plating. This layered treatment prevents substrate metal diffusion and improves the hardness and durability of the plating.