Beryllium copper fingers

Technical advantages of beryllium copper EMI fingers

Beryllium copper (BeCu) fingers are made from an alloy of 1.5-2 % beryllium, which gives the material very good spring properties and excellent electrical conductivity. They are used as conductive fingers for shielding in applications where both high frequency shielding is required and there is a need for wear resistance.

Our beryllium copper fingers are designed to protect your equipment from interfering signals. They are very durable and can be opened and closed many times without losing their shape, so they are perfect for frequently used cabinets and doors. To ensure they last a long time and don't rust, they can also be given a protective coating of nickel or gold, for example. The products work equally well in both extreme cold and heat, and they are easy to install without damaging your cabinets or doors. In other words, you get a reliable and durable solution that does the job - year after year.

BeCu fingers are often used here

EMI fingers are used in industries where reliable and stable shielding is needed: 

1. Telecommunications: Displays 5G equipment, antenna modules and base stations.
2. Defence industry: protects critical systems in combat vehicles and communication equipment.
3. Medical devices: EMI shielding for MRI cameras and patient monitoring technologies. 
4. Aerospace industry: Used in satellite hatches and avionics systems.
5. Industrial automation: Screens drives and robot controllers.
6. Construction: Screened rooms and containers.

Swelex range of conductive fingers for cutting

Swelex offers beryllium copper EMI fingers in several profiles:

1. BeCu D-profile: Classic shape for doors, with self-adhesive adhesive.
2. Low profile fingers: For tight spaces in portable devices.
3. Earthing fingers: Advanced connectors with double contact points.
4. High frequency optimised fingers: For mmWave applications up to 40 GHz.

All products can be supplied with custom plating (Au, Ag, Sn, Ni or any other) and length. Do you need electrically conductive fingers for a unique application? Our experts will also help you with CAD design for customised solutions.

BeCu fingers from Swelex: 5 reasons

1. Wide range of standard profiles - fast deliveries
2. Fast technical support.
3. BeCu from certified suppliers.
4. Help with FEM analysis for optimal shielding.
5. Long lifetime that reduces maintenance costs.

Advice for the installation of EMC spring connectors

To maximise the effectiveness of the shielding with beryllium copper gasket: 

• Avoid over-compression: Excessive clamping force poses an injury risk and reduces shielding performance.
• Galvanic compatibility: Match the plating (e.g. tin, nickel, chromated, silver or gold) with the application to prevent corrosion.
• Mounting method: Choose between self-adhesive, soldering, rivet or clamp fasteners depending on the application.