ERNI Power Elements Female Metric Thread From ERNI Electronics, a range of high current single piece power elements. These female threaded power elements are predominately used when dealing with power sourcing applications and high current PCB. The power elements feature press-fit technology eliminating the need for soldering which prevents the PCB being exposed to temperature stresses. The power elements are versatile and can be used in a vast array of applications including high current relays, battery disconnect switches and high current fuses.