Electronic – Same diodes (BAT54) from two manufacturers with different LTSpice characteristics

diodesltspice

Leaving the package and the resulting thermal characteristics aside, do diodes with the same name from different manufacturers have the same characteristics?

I would think they should, but when comparing a BAT54 from Diodes and NXP in LTSpice, I get different results.

NXP BAT54, SPICE model under "Documentation"

Diodes BAT54, SPICE model listed under "BAT54(Z)"

I simply put the diode in a DC sweep circuit from 0-2V and measured the forwardvoltage and -current.

What I got was:

Diodes BAT54: 200mV@1mA ; 254mV@5mA ; 287mV@10mA

NXP BAT54: 225mV@1mA ; 278mV@5mA ; 309mV@10mA

Is one model more accurate than the other? Or did I mess something up?
The Diodes file is a .model, the NXP is a .subckt with an additional resistor.

I copied the spice files (NXP_BAT54.prm and Diodes_BAT54.txt) into the folder with the LTspice circuit, added a standard Schottky, renamed it to BAT54, set the Prefix to D / X and added the files with a ".lib NXP_BAT54.prm" command.

When I put both curves on top of each other, you see the difference:
U-I Plot BAT54 Diodes and NXP

Best Answer

Models and graphs are given to shown nominal , while specs are common to both and others with ;

240 mV @ 1mA.
320 mV @ 10mA.

The Min/Max ratings at given conditions should be the same.

Diodes Inc have pioneered lower voltages by improving the bulk series resistance by design and may have some advantage. (Hundreds of patents)