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Old 6th February 2004, 08:44 AM   #1
Electrons are yellow and more is better!
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Default SPICE models for plain zeners

I'm trying to find Spice models for plain 400mW and 1.3 W hole mounted zeners. The most interesting value for me is 27 and 33 V.

I have tried searching without any success.

BTW: I'm also after a model for a 2 x 8(10) A, 2-pole relay with 24 V coil, and ordinary small power relay
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Old 6th February 2004, 08:54 AM   #2
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Quote:
BTW: I'm also after a model for a 2 x 8(10) A, 2-pole relay with 24 V coil, and ordinary small power relay
What the **** do you want a relay's SPICE model for ?????

Do you want to model the nonlinearity of the contact or what property are you interested in ?

Regards

Charles
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Old 6th February 2004, 09:02 AM   #3
Electrons are yellow and more is better!
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yes, relays may seem odd but I'm interested in some circuits with 230 VAC in and a relay contact is the very end of the circuit.

I'll guess I'll have to settle for the coil only but if there were of real model for a relay I would be interested.
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Old 6th February 2004, 09:12 AM   #4
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I have the 8.0 version of Microsim's PSPICE and it definitely has a model for a controlled switch called Sbreak.

With this you should be able to "build" a relay by adding resistors and an inductor.

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Charles
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Old 6th February 2004, 09:16 AM   #5
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27V/500mW
.MODEL 1N971A D (IS=5.72393F BV=26.83 IBV=4.6M RS=41 CJO=41.5004P VJ=750.189M
+ M=507.423M RL=1G)

33V/500mW
.MODEL 1N973A D (IS=5.72393F BV=32.8 IBV=3.8M RS=58 CJO=123.457P VJ=750.153M
+ M=512.127M RL=1G )

27V/1W
.MODEL 1N3030A D (IS=5.72393F BV=26.68 IBV=9.5M RS=35 CJO=671.649P VJ=750.19M
+ M=500.83M RL=1G )

33V/1W
.MODEL 1N3032A D (IS=5.72393F BV=32.68 IBV=7.5M RS=45 CJO=691.859P VJ=750.141M
+ M=505.204M RL=1G )

Hope this helps.

/Hugo - has many more if more specific.
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Old 6th February 2004, 09:54 AM   #6
Electrons are yellow and more is better!
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Thanks, Hugo. You are a real pal! Where do you keep all stuff?

What Am I doing? I'm trying to simulate a softstart circuit but when I add inductance (simulating a relay) LTSpice goes bazooka. It will become extremely slow. I wonder why?
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Old 6th February 2004, 10:12 AM   #7
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Quote:
Originally posted by peranders
Where do you keep all stuff?
Got a big HDD
Quote:
What Am I doing? I'm trying to simulate a softstart circuit but when I add inductance (simulating a relay) LTSpice goes bazooka. It will become extremely slow. I wonder why?
As I don't know LTSpice I can't help you out here. Soon the guru's will arrive

/Hugo
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Old 6th February 2004, 10:32 AM   #8
Electrons are yellow and more is better!
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Quote:
Originally posted by Netlist

Got a big HDD

As I don't know LTSpice I can't help you out here. Soon the guru's will arrive
I went to lunch and my .raw file is 500 MB! I'll guess something in my move isn't very smart.
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Old 6th February 2004, 10:53 AM   #9
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Quote:
Originally posted by peranders
yes, relays may seem odd but I'm interested in some circuits with 230 VAC in and a relay contact is the very end of the circuit.

I'll guess I'll have to settle for the coil only but if there were of real model for a relay I would be interested.
Why don't you use SS relays?
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Old 6th February 2004, 11:12 AM   #10
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Quote:
Originally posted by peranders

I went to lunch and my .raw file is 500 MB!
So you have a big HDD too!

Here are two links explaining relays in spice:
http://www.eettaiwan.com/ARTICLES/20..._EDA_AN207.PDF
http://www.spectrum-soft.com/down/fall2000.pdf

/Hugo
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