Terminating stranded/flexible wire before landing it on screw-type terminal blocks (like the Dinkle DK4N in this catalog) or on contactor/starter terminals, avoiding loose strands that escape or cause a poor contact.
Ferrule
AWG 22-14
Tinned Copper
450-Piece
What is it and what's it for?
When a cable isn't solid wire but a bundle of thin twisted strands ("flexible" or stranded wire), those loose strands fan out or slip free if you land them straight under a screw — like trying to screw down a paintbrush instead of a nail. A ferrule is a small metal sleeve that slides onto the wire's end and gets squeezed ("crimped") with a dedicated tool, compacting all the strands into one solid cylinder. That cylinder fits cleanly under a screw or into a terminal block, with no loose strands to escape, short against the neighboring terminal, or lose contact from vibration.
Real-world use cases
At home
In a home panel this rarely matters — solid THHN wire is the norm there, and it lands straight under a screw with nothing extra needed. But if you're working with stranded wire, like the internal wiring of an audio cabinet or a home electronics project, a ferrule prevents the classic problem of one stray strand touching somewhere it shouldn't.
In a business or workshop
This is where it actually pays off in this catalog's industrial panel: any stranded wire landing on the Dinkle DK4N (screw-type) or directly on a contactor's or soft starter's terminal gets a tighter connection that holds up better against the vibration of motors and pumps running — exactly the kind of slow failure (a strand working loose over time) that's hard to diagnose later, because the panel 'still works, just poorly' before it fails outright.
How to avoid buying the wrong one
It doesn't include a crimping tool — you need a dedicated ferrule crimper (not a regular wire stripper) for an even compression; without the right tool the ferrule stays loose and defeats its own purpose.
The kit covers 5 sizes in one box (AWG 22 to 14) — confirm your wire's actual gauge before crimping; a wrong-sized ferrule won't grip properly even if it slides on.
At 41 reviews, it has a thinner track record than other BAOMAIN parts in this catalog (422 reviews on the E-Stop, for example) — fine for a low-risk consumable kit, but not the most-reviewed part here.
The investment takeaway
At $7.49 for 450 pieces, the cost per connection is close to nothing next to the problem it prevents: a loose strand causing a false contact or short in an industrial panel isn't just an annoyance, it's a failure point that can stop a motor or, worse, cause an electrical arc. Compared to skipping this step and wiring stranded cable straight into a screw terminal, the investment is minimal — and the reliability gain, especially on equipment with constant vibration like motors and pumps, is worth far more than the few cents each terminal costs.
Supports all three serial standards (RS232/485/422) on one device, so it works for both old instruments with an RS232 port and multi-device RS485 buses. PoE power is a real plus in installations where there's no outlet near the panel — a single Ethernet cable carries both data and power. Confirm whether your Modbus master needs TCP Server or Client mode before buying; the mode is set in software, it doesn't come fixed from the factory.
Single-phase input to 220V three-phase output — the typical choice for workshops without a three-phase feed that want to run a 3-phase motor. This is an entry-level model (2HP/1.5kW), meant for spindles and small CNC motors, not large industrial loads. The output range up to 3000Hz is only useful if your specific spindle takes advantage of it — for a standard 60Hz motor it's irrelevant.
Has vector control (not just scalar V/F), which holds torque better at low RPM — important if you'll be threading or cutting at reduced speed. At 5HP/4kW it covers larger motors than the entry-level model, and accepts both single-phase and three-phase input, giving flexibility depending on the electrical setup available. Rated up to 26A — confirm your wiring and breakers can handle that current before installing.
