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If you drop an iPhone hard enough it wil dent. Drop a polycarbonate phone: no problem. Windows phone wasn't a great OS, but the Lumia line were absolute tanks.

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PC is a very impact resistant material, but you can also form it cold, a bit like mild steel, actually.

So is nylon. But nylon is hydroscopic, and thus not well suited for electronics applications.

I do prefer ABS-PC or ASA for a lot of my more-adverse condition cases. They're much more heat resilient, and chemical/UV resistant in ASA's case.

Well, a great many connectors (even, or rather, especially industrial ones) are made from PA6 or 66 with some glass fiber fill; including the actual contact carriers (if they are a separate part). FR4 is somewhat hygroscopic as well; moisture expansion causes real problems for some applications. Never heard of issues with PA connectors.

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