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.
25-78FS-BD-85.875-NTP Features
Fingerstock
25-78FS-BD-85.875-NTP Applications
There are a lot of Leader Tech Inc. 25-78FS-BD-85.875-NTP RFI and EMI Contacts applications.