Beryllium Copper Fingers

Beryllium Copper EMI finger stock gaskets have superior mechanical spring characteristics and high electrical conductivity making them ideally suited to shielding application where frequent access is required such as shielded room doors. These are available in profiles to suit most EMI shielding applications including grounding. Many plating finishes are available to address galvanic compatibility concerns and enhance shielding performance.

Beryllium copper (BeCu) spring finger and contact gaskets are manufactured by punching or etching.thin BeCu strip which is pressed and formed into the required final shape and then heat treated to give it ‘memory’.

Due to their high conductivity, BeCu gaskets provide good EMI/RFI shielding together with low closure force properties and are available in a number of plated finishes and mounting styles. In certain closingapplications the ‘wiping’ action enhances shielding performance.

The end product results in a low resistance contact finger with excellent anti-corrosion properties that remains flexible within acceptable limits for many years.

BeCu fingers are suited for use in high cycling RFI/EMI and EMP applications where frequent access is required as their construction makes them resistant to fatigue and only low compression forces are needed. They are suited to high and low temperature applications and their wiping action makes them ideal for use in:

• Cabinet doors
• Access panels
• Personnel doors in screened rooms and containers
• Shielded rooms
• Grounding contacts

• Solderable unplated
• Clean and Bright (unsolderable)
• Gold
• Silver
• Bright Tin
• Bright Nickel
• Zinc / Clear Chromate
• Electroless Nickel

• This product does not provide an environmental seal.
• Over-compression can result in damaged fingers and loss of effectiveness.
• Ensure galvanic compatibility with mounting surfaces. Fixing method must be appropriate to the application. Exposed gaskets are susceptible to damage, catching on clothing etc.