Let’s put some AWG 22 wire and a similar sized contact in the AWG 20 die and see if we can re-create it: Whatever it is, I don’t have one, but it doesn’t matter because I’m only looking at the crimps. The marketing image typically attached to this tool features a mystery contact crimped onto AWG 22 wire. Source: TE Connectivity The other two dies? If we were to cut open the wire parts of the DuPont vs IWISS crimps, we would find something like this. The SN-025 not having an AWG 24 die, it over-crimped the insulation as we would expect, and the wire part isn’t crimped anywhere near as tight as it is supposed to be – typical for Chinese tools. It did do marginally better than the Preciva PR-3254 I reviewed previously. (Since writing this article I have come across a slightly better tool for these contacts). Of course SN-025 wasn’t going anywhere near the HT-95’s crown as ultimate “DuPont” crimp tool. Let’s put some “DuPont” contacts in there and see what we end up with: Edit: Since I wrote the page, I have obtained another tool, which is even better than the above for crimping “DuPont” clone type contacts. The gold standard which I’ll be comparing against. Not something I’ve ever used myself, but no doubt commonly used in the automotive space. While this is being sold as a “DuPont” crimp tool, it appears it is predominantly designed for Superseal contacts. It’s almost as-if they’ve been reading my crimp connectors page… The above graphic is provided by the Amazon seller, specifically pointing out that it wraps the insulation around the wire. A “DuPont” contact, and, err, what’s that other one? Recognise it? please drop a comment. Two contacts apparently crimped with the IWISS SN-025. Only those in possession of either the DuPont-designed hand tool (extremely expensive) or the appropriate automated applicator had been able to crimp them correctly. In the decades since imitation DuPont Mini-PV connectors first surfaced, hobbyists instead had to resort to mutilating contacts in unsuitable tools like the one above on the left. Some contacts (for example “DuPont” type) require a tool like this for correct crimping however historically almost no generic hand tools with this type of die had been available. SN-025 is a particularly unusual crimp tool because it has ‘O’ shaped insulation crimpers. A little bit of context Left: The jaw of a typical budget tool. At the time I wrote this article, the SN-025 is not (yet) listed on IWISS’s website? IWISS now have a product page for this tool. We have a new tool ( Amazon UK link), which is also apparently specifically designed for these contacts. Following on from my recent review of the Preciva PR-3254 crimp tool, I hit up eBay and Amazon to see if any other such tools may have surfaced lately.
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