There is a Contact RFI that contains materials from Beryllium Copper.It is possible for the EMI/RFI to operate normally at -55°C~121°C.A contacter RFI with the Fingerstock type.
7-13U-BD-12 Features
Fingerstock
7-13U-BD-12 Applications
There are a lot of Leader Tech Inc. 7-13U-BD-12 RFI and EMI Contacts applications.