there are 3 pspice for 2N5457 1. from onsemi mmbf5457=2N5457 ------------------------------------ * Model generated on Dec 6, 02 * MODEL FORMAT: PSpice .MODEL Jmmbf5457lt1 njf +VTO=-3.86852 BETA=0.000307346 LAMBDA=0.00449867 RD=15.735 +RS=49.9999 IS=1e-14 CGS=1e-12 CGD=1e-12 +PB=1 FC=0.5 KF=1e-20 AF=0.2 2. from motorola ----------------------------------- *2N5457 MCE 7-10-95 *Ref: Motorola Small-Signal Databook, Q4/94 *25V 25mA 250 ohm Dep-Mode pkg:TO-92B 3,1,2 .MODEL 2N5457 NJF(VTO=-1.8 BETA=0.00135 LAMBDA=0.001 RD=35 RS=31.5 + CGS=2.25E-12 CGD=6E-12 KF=6.5E-17 AF=0.5 ) 3. from national ----------------------------------- .model J2N5457 NJF(Beta=1.125m Betatce=-.5 Rd=1 Rs=1 Lambda=2.3m Vto=-1.372 + Vtotc=-2.5m Is=181.3f Isr=1.747p N=1 Nr=2 Xti=3 Alpha=2.543u + Vk=152.2 Cgd=4p M=.3114 Pb=.5 Fc=.5 Cgs=4.627p Kf=10.45E-18 + Af=1) * National pid=55 case=TO92 * 88-08-03 rmn BVmin=25 which one should i use?