A third lead 38 of {TAIL ~ the voltage suppressor} 28 is connected to {HEAD ~ a ground potential} 
A third lead 38 of { TAIL ~ the voltage suppressor } 28 is connected to { HEAD ~ a ground potential }
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD