Thanks Brendan,
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I'm glad you're helping chew on this with me. Looking deeper into the spec sheet, it seems like they might be the same actual part with the only difference being what sized reel they ship on (if you buy the whole reel). The attached image shows their numbering scheme. That's from here:
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The way I read that, the T comes on a 13" reel and the H comes on a 7" reel. Everything else is the same. It's strange that the product page is slightly different between the two...gotta love other people's databases, I guess.
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Like you suggested, I'll skip replacing them for now as long as they look ok. I do plan on ordering some with the rest of my Mouser order just to have them on hand.
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Thanks again!
Bryan