1) 	BF 		Forward active current gain 
2) 	VJE 		Base-emitter built-in potential
3) 	BR 		Reverse active current gain 
4) 	VJC 		Base-collector built-in potential
5) 	IS 		Transport saturation current 
6) 	VAF 		Forward mode Early voltage
7) 	CJE 		Base-emitter zero-bias Junction capacitance
8) 	VAR 		Reverse mode Early voltage
9) 	NF 		Forward mode ideality factor
10)	CJC 		Base-collector zero-bias Junction capacitance 
11)	NR 		Reverse mode ideality factor
12) 	RB 		zero bias base resistance 
13)	MJE 		base-emitter capacitance exponent
14)	RE 		emitter resistance 
15)	MJC 		base-collector capacitance exponent
16)	RC 		collector resistance 
17)	EG 		energy gap for temperature effect on IS