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.
14-37FS-BD-300" Features
Fingerstock
14-37FS-BD-300" Applications
There are a lot of Leader Tech Inc. 14-37FS-BD-300" RFI and EMI Contacts applications.