Again, switching may be accomplished through electro/mechanical devices such as relays or solid state devices such as SCRs, {TAIL ~ triacs} or {HEAD ~ MOSFETS} 
Again , switching may be accomplished through electro / mechanical devices such as relays or solid state devices such as SCRs , { TAIL ~ triacs } or { HEAD ~ MOSFETS }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD