***********************************************************************
***********           PANJIT International Inc.             ***********
***********************************************************************
*Sep 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 1SMA4748-AU A K
.param
+vc0 = 1.730e-10      vc1 = 3.050e-11	  vc2 = 1.050	      vc3 = 2.800e-11	  vc4 = 2.050e-1
+tc1 = 1.000e-5       tc2 = 3.100e-5	  tc3 = 2.001e-2      tc4 = 9.500e-3   
d1 A A1 zener
g1 A1 A value = {irexp(v(A1,A))}
v1 A1 K1 0
e1 K1 K value = {rbv(i(v1))}
.func irexp(v) {(vc0+vc1*pwr(v,vc2))*(1.0+tc1*(temp-25)*exp(tc2*(temp-25)))+(vc3*exp(vc4*v))*(1.0+tc3*(temp-25)*exp(tc4*(temp-25)))}
.func rbv(i) {1.010*min(i,0)}
.model zener d
***** flag parameter ***
+level = 1   
***** dc model parameter ***
+ is = 2.884e-15        n = 1.019	   rs = 1.360e-2      ikf = 1.664        
+ibv = 11.5e-3	      nbv = 1 		   bv = 22
***** capacitance parameter ***
+cjo = 1.682e-10        m = 3.176e-1	   vj = 6.251e-1
+ fc = 0.5                      
***** temperature coefficient ***
+tnom = 25	       eg = 1.145  	  xti = 3
+trs1 = 9.500e-4     tbv1 = 8.300e-4     tikf = 1.800e-3
.ends 1SMA4748-AU
*$
