I was trying to design a simple voltage relay in LTspice and I wanted to use a DIAC, but I had a hard time finding a model that worked. Finally I found the following in an obscure Japanese or Chinese website
- PSpice Model Editor - Version 9.2
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*SRC=DB3; 32V 2A
*DIAC
*¸?äDZµÄBV¿ÉÒ??äVbo .SUBCKT DB3 1 2
- TERMINALS: MT2 MT1 QN1 5 4 2 NOUT; OFF QN2 8 6 7 NOUT; OFF QP1 6 8 10 POUT; OFF QP2 4 5 9 POUT; OFF D1 7 9 DZ D2 2 10 DZ DF 4 3 DZ; OFF DR 6 3 DZ; OFF RF 4 3 1.13E+7 RR 6 3 1.13E+7 RT2 1 7 0.755 RH 7 6 10k RH2 4 2 10k .MODEL DZ D (IS=321F RS=100 N=1.5 IBV=10N BV=30.3) .MODEL POUT PNP (IS=321F BF=100 CJE=134p TF=25.5U) .MODEL NOUT NPN (IS=321F BF=200 CJE=134p CJC=26.8p TF=1.7U) .ENDS
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Some other less useful sites are:
The website
under construction page :(
What I want to do is replace a voltage relay in an octal enclosure that determines if the voltage is nominally 120 VAC or 208/240 VAC, and allowing the mains voltage to be applied to the power section of the unit only if it is properly configured in series or parallel. The present design uses a capacitor dropper circuit that has proven unreliable in the field, probably from high current spikes due to high frequency components of the waveform.
Paul