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We had a batch of 4mm² MC4 terminations last week where inconsistent crimp depth was causing pull-test failures, so I went looking for something with a ratchet mechanism that actually holds the die position through the full stroke rather than relying on operator feel.
It's a straight-shaft, 190mm long tool weighing about 450g with high carbon steel jaws that cover 2.5mm² up to 6mm²—which roughly translates to 14-10 AWG—and the ratchet doesn't release until you've completed the full cycle, which basically eliminates teh half-crimp problem we were seeing with cheaper pliers.
CE and RoHS certs are on file with the suplier, they offered a 1-year warranty (usually 2-4 weeks lead time, but confirm stock), and ergonomic red and blue handles are comfortable enough for repetitive use, though it's really not suited for field repairs on existing arrays where you'd need a compact tool for tight junction boxes—the straight shaft limits access in corners pretty badly.
Anyway, the model number is KNSN-2546B, and we're ordering a dozen units on standerd payment terms with the COA included per batch.
