I measure Diameter 28.27mm
Thickness 5mm (6mm if you include the legs)
Leg thickness 1mm,
Resistance ~8-9 Ohm .
Lead spacing 10.5-11.4mm. (First measurement is parallel to ceramic disc, outside of legs, Second is point to point outside of legs)

I can't find anything that matches this. What do the manufacturers refer to Tmax (Thickness max) and Dmax (Diamater max)?

Is the resistance the most important thing to look at to find a match? What else?

 

Amperage max, resistance max and min

 

I measure Diameter 28.27mm
Thickness 5mm (6mm if you include the legs)
Leg thickness 1mm,
Resistance ~8-9 Ohm .
Lead spacing 10.5-11.4mm. (First measurement is parallel to ceramic disc, outside of legs, Second is point to point outside of legs)

I can't find anything that matches this. What do the manufacturers refer to Tmax (Thickness max) and Dmax (Diamater max)?

Is the resistance the most important thing to look at to find a match? What else?

View attachment 144289

This is called a thermistor. It can be used to limit inrush current. Contact this outfit: www.amatherm.com and see if they can identify and match your part.

 

https://www.mouser.com/ProductDetai...qZeNK75brD0vez7KRjHtD0O1VEXtdZuspvu1N6xso8A==
Looks similar.
SG

 

What device are you pulling this out of? It could help with figuring out voltage and current specs.
My crystal ball is in the shop right now so taking a stab at finding the correct part is going to be slim to none.

 

What device are you pulling this out of? It could help with figuring out voltage and current specs.
My crystal ball is in the shop right now so taking a stab at finding the correct part is going to be slim to none.

Leeson VFD 174605 or Lenze ESV751N01SXB (they are the same). I believe they get used on the DC bus with 2x 3500uF 200V caps

 

I would contact Leeson and ask them for a service manual or parts. You will want the proper parts repairing a VFD or nasty things can occur, but I am hazarding a guess its a 12 amp rating. We also need to know how many ohms it should be cold, and how many when hot. Are they all blown or is there another intact one you could measure?

 

This one should work fine unless there is some sort of capacitance requirement that's critical but I doubt it at this power level.
https://www.ametherm.com/datasheets/as3210015/