Shielded DC Power Jacks Switchcraft Shielded DC Power Jacks are equipped with a brass shell for RF / EMI shielding and are designed for harsh environments. These Switchcraft shielded jacks feature a front-mount jack with a metal housing and a thru-hole PCB mount jack with a metal shield. Both types are available in multiple center-pin sizes. The jacks operate over a -40°C to +65°C temperature range and feature 5000 cycles minimum durability.