{HEAD ~ An IC power protection circuit} functions as {TAIL ~ a surge protection circuit} and reverse connection protection circuit 
functions as
{ HEAD ~ An IC power protection circuit } functions as { TAIL ~ a surge protection circuit } and reverse connection protection circuit
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH