specifying inductor wire

Why not contact a magnet wire supplier and ask them? My experience is that they have a lot of experience in this area and will be happy to help you out. A Google search will turn up several. New England Wire

You didn't say much about the inductor, but 200V across 19 turns on that physical size core suggests to me that either it's a very high permeability core, or the frequency is high, or some of both. Would the application benefit from higher Q? 24AWG is quite small for 19 turns on that size core; I suppose you could use 14AWG on it, or get about 100 turns of 24AWG in a single layer on it. And you may benefit from using Litz wire, too. Is the core size chosen for core loss or for saturation? You may be able to save far more by using a core better suited for the application, than by worrying about what type of wire to use for a 30 inch length of 24AWG, almost independent of the insulation you put on it -- again suggested by the very small wire you're using on that core. If you _really_do_ only want to use 24AWG solid wire on such a large core, for your concerns, I'd say to just use PVC-insulated hookup wire. But it doesn't sound like a very optimized design to me, from the little I know about it.

"mini Ring Core Calculator" available free on the web may be interesting to you.

Cheers, Tom

Depending on the core coating, there is little liklihood of shorting through the core body, without extreme external abuse, post-assembly. Pre-specifying alternate core types from alternate vendors can reduce part cost and delivery time.

Specify easily-obtained and alternative magnet wire grades in your intended insulation temperature class range. Popular 130degree solderable types are MW28/MW75 or MW79/MW80. Do not specify a vendor or trademarked material.

You might want to give some consideration to mounting and termination methods.

For wave solderable assemblies, platforms can be used, with the part body epoxied into position and the leadout wires rigidly located. Identification labelling should be present and permanent. Pre-formed platforma are available from Lodestone, Cosmo and many core manufacturers.

For parts with longer flying leads, you should consider stranded insulated lead wires. In a part like this - you might just as well use stranded leadwire for the complete winding.

A really simple part is likely to have off-the-shelf alternatives.

RL