How to select the right shielding gasket for industrial servo cabinet doors?

The selection of the shielding gasket for the servo cabinet door directly affects the gap shielding effectiveness. Etymotic Selection Guide: First, determine the highest frequency (f_max) requiring shielding (e.g., 1GHz) and the required shielding effectiveness (SE) (e.g., 40dB). Select the gasket type based on the door gap width, compressible space, and environment (e.g., temperature, humidity):

1) Conductive rubber gasket: Suitable for uneven surfaces, good environmental adaptability, but requires high compression force.

2) Metal mesh gasket (with rubber core): Good compressibility, lower cost.

3) Finger spring (Qin wire): Extremely low contact impedance, suitable for frequently opened and closed doors, but expensive.

Key selection parameters:

a) Compression deformation range: Usually 20%-30%.

b) Contact resistance: <10mΩ. c) Shielding effectiveness: Meets requirements at f_max.

During installation, the gasket should be installed in the groove of the door or cabinet to ensure tight contact with the metal surfaces on both sides after compression. Proper selection and installation can enable the cabinet door to achieve a shielding effectiveness of over 60dB at 1GHz.