International Standards and Conformity Assessment for all electrical, electronic and related technologies

SC 77C

High power transient phenomena


SC 77C Scope

SC 77C

Standardization in the field of electromagnetic compatibility to protect civilian equipment, systems and installations from threats by man-made high power transient phenomena including the electromagnetic fields produced by nuclear detonations at high altitude (High Altitude Electromagnetic Pulse (HEMP)) and sources of Intentional Electromagnetic Interference (IEMI).

Note: High power conditions are achieved when the peak incident electromagnetic field exceeds 100 V/m.

Further information

United Kingdom
SC 77C Officers