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.
3-20T-SN-24 Features
Fingerstock
3-20T-SN-24 Applications
There are a lot of Leader Tech Inc. 3-20T-SN-24 RFI and EMI Contacts applications.