The beryllium copper (BeCu) and stainless steel EMI contact fingers from Chomerics combine a high level of EMI shielding with a very flexible material, which requires only a low contact pressure. The excellent performance of beryllium copper, such as: high tensile strength, very good electrical conductivity, make it an ideal material for EMI shielding over a wide frequency range. The application is to allow doors and covers of shielded rooms to make particularly good electrical contact with the frame. Even with frequent opening and closing. In addition, depending on the design, a wiping movement can help to reduce any oxide build-up. An alternative application is that they are easily used to make current-carrying contacts or end stop switches. One way to prevent oxidation is to ensure that the metals are galvanically compatible. To achieve this, the profiles are supplied plated without this being at the expense of flexibility. For applications that are less mechanically demanding, there are stainless steel spring contacts. These are slightly stiffer but offer good tensile strength, extreme operating temperature range and good electrical conductivity.
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