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***********           PANJIT International Inc.             ***********
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*Nov 14, 2025                                                         *
*                                                                     *
*This SPICE Model describes the characteristics of a typical device   *
*and does not respresent the specification. Designer should refer to  *
*the same type name data sheet for specification limits.              *
***********************************************************************
*$
.subckt SB54AFC-AU A K 
.param
+vc0 = 5.863e-7      vc1 = 2.085e-7	 vc2 = 1.000            vc3 = 2.805e-8		vc4 = 1.457e-1
+tc1 = 1.145e-1	     tc2 = 4.311e-2	 tc3 = 8.321e-2	      	tc4 = 3.501e-2
d1 A K zener
g1 K A value = {irexp(v(K,A))}
.func irexp(v) {(vc0+vc1*v**vc2)*(1.0+tc1*(temp-25)*exp(tc2*(temp-25)))+(vc3*exp(vc4*v))*(1.0+tc3*(temp-25)*exp(tc4*(temp-25)))}
.model zener d
***** dc model parameter *****
+ is = 2.297e-6	       n = 1.048	  rs = 1.540e-2
+ibv = 0.5e-3	     nbv = 1		  bv = 44
+ikf =7.000
***** capacitance parameter *****
+cjo = 6.409e-10       m = 6.867e-1	  vj = 1.594
+ fc = 0.5
***** temperature coefficient *****
+tnom = 25	      eg = 6.420e-1	 xti = 3
+tbv1 = 5.039e-4    tbv2 = 4.409e-7   
+trs1 = -1.025e-5   trs2 = 3.000e-5
.ends SB54AFC-AU
*$
