The system includes a circuit board, a solid state switching device, {HEAD ~ a heat sink}, and {TAIL ~ a temperature sensor} 
The system includes a circuit board , a solid state switching device , { HEAD ~ a heat sink } , and { TAIL ~ a temperature sensor }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL