beryllium-copper (BeCu) fingerstrips

Beryllium-copper fingerstrips 2000 series

Fingerstrip gaskets and metal grounding products for shielding and grounding. Used in construction where a large spring range is required and the contact frequently is being pressed and released.

Our range of beryllium-copper fingerstrips and contact strips provides cost-effective long-term EMI/RFI shielding, without any risk of degradation as a result of repeated opening and closing of the enclosure, or of bending of the beryllium-copper fingers. The Be/Cu fingerstrip is also referred to as Be/Cu fingerstock.

How do Be/Cu fingerstrips work?

Modern electronic equipment often requires EMI/RFI shielding and an EMI/RFI-shielding gasket in order to avoid EMI/RFI radiation and to prevent interference from outside sources.

EMI/RFI gaskets that were designed and manufactured utilizing the strengths of beryllium and copper (Be/Cu) are the industry standard throughout the world. Starting with the emergence of RFI/EMI problems in the early days of military electronics, Be/Cu EMI/RFI shielding gaskets have been the solution of choice.

Be/Cu fingerstrips/fingerstock do two things very well

• The mechanical spring characteristics of Be/Cu fingerstrips/fingerstock are far superior to all other EMI/RFI-shielding gaskets in the industry.
• Be/Cu fingerstrips/fingerstock offer the highest EMI/RFI-shielding effectiveness.

Custom-engineered stampings

Apart from beryllium-copper, we also offer shielding and custom-engineered stamping in stainless steel, brass, phosphor bronze and other special alloys.

Example of usage

Fingerstrips are often used in construction where a large spring range is required and the contact frequently is being pressed and released. Fingerstrips are in fact not very susceptible to wear.

Fingerstrips are widely used to make a good contact between hatch and housing or door and Faraday cage. An example of a shielded box with a hatch and housing construction is being displayed below.

Large stock, quick delivery

The Be/Cu fingerstrips are available in a variety of surface finishes, with or without tape or conductive tape. These Be/Cu fingerstrips can be delivered within 5-10 working days.

Click the desired Fingerstrip series

2100 - Clip-on mounting Fingerstrip series

For applications where a small dynamic range is required and a clip-on mounting is preferred. Also for use where high temperatures or other design considerations preclude the use of adhesive-mounted gaskets.

2200 - Snap-on mounting Fingerstrip series

Mounting through holes in your construction. You can mount the Fingerstrip by pushing it into position.

2300 - Stick-on mounting Fingerstrip series

Thanks to their self-adhesive tape, these beryllium-copper shielding gaskets provide easy and secure mounting.

2400 - Twisted Fingerstrip series

For small gaps and screwed applications. For narrow electronic shielding applications.

2500 - Angle Fingerstrip series

Ideal for 90° applications, where the fingerstrip has to be mounted onto the surface perpendicular to the finger compression area.

2600 - Circular Fingerstrip series

Circular fingerstrips are used for grounding and EMI shielding in high-frequency equipment and for forming large-diameter, round-contact rings.

2700 - Contact Fingerstrip series

These fingerstrips are very easy to bend and are therefore suitable for round and very dynamic contacts.

2800 - Door Fingerstrip series

EMI fingerstock, fingerstrips and spring contacts for shielded Faraday-cage doors, electrically conductive doors and lids.

2900 - PCB contact fingers

Surface-mount spring contacts for EMI shielding and grounding at the PCB level.

All fingerstrips on one page

All types of fingerstrips clearly displayed on one page

Determine the correct Fingerstrips

1. Proper size

Determine the correct size of the mounting area (See Figure 1.)

2. Dynamic range of compression

Each shielding gasket is compressed to a certain distance, depending on the design. A positive contact force can usually be assured when the gaskets are compressed up to 25% of their relaxed height or more.

3. Attachment methods

With the Holland Shielding Systems BV standard configuration there are the following mounting methods:

• Clip-on mounting
• Instant tac adhesive
• Conductive adhesive
• Solder
• Weld
• Hardware

For more information see Figure 2.

4. Correct orientation

Many of the Holland Shielding Systems BV gasket designs depend on the active contact surface (top) being engaged at, or behind, the cross-sectional centre line. To assure the proper angle of engagement, the guidelines below should be followed for best results.

Retaining lances for clip-ons

Most clip-on styles are available with retaining lances which enhance the spring grip onto the mounting surface.

Adhesive tape specifications

Holland Shielding Systems BV shielding designs incorporate two types of adhesive tape on many of the gaskets.

Instant tac adhesive

Application: for areas where the two opposing surfaces can be connected by contacting at least one point of the shielding gasket's profile on each surface.

Temperature range: -50 °F (-46 °C ) to +300 °F (+149 °C)

Conductive tac adhesive

Application: for areas where the two opposing surfaces can be connected by contacting one point of the shielding gasket's profile on one side and Conductive tac on the other.
Temperature range: -50°F (-46 °C ) to +300 °F (+149 °C)