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The GOSONO DC power plug connector set is a pack of ten screw-terminal DC barrel plugs, listed as 5.5 x 2.5 mm and rated for 12 V at up to 3 A. It lets you terminate bare wire into a standard barrel plug without soldering, which is handy for LED strips, CCTV cameras and small shop gadgets; it is not a high-current or outdoor connector.
The notes below are based on the seller’s Amazon listing. The key check is the plug size and polarity of your equipment, because barrel connectors look alike but are not interchangeable.
Quick specs at a glance
| Item | Detail |
|---|---|
| Item | DC barrel plug connectors with screw terminals, 10-piece set |
| Listed barrel size | 5.5 mm outer diameter x 2.5 mm inner pin |
| Listed electrical rating | 12 V DC, 3 A maximum |
| Listed material | Zinc alloy conductor / body per the listing |
| Termination | Screw fastening, no soldering required |
| Typical uses | 12 V LED strips, CCTV cameras, small DC devices |
| To check | Polarity, wire gauge range, weather resistance |
What it is and who it suits
A DC barrel plug is a round connector with a tube on the outside and a pin in the middle. A screw-terminal version has two small terminals inside the handle, so you can strip a wire, tighten the screws and screw the cover on. Ten pieces is enough to convert several power cables, cut off damaged ends or build custom leads.
It suits:
- People adding plugs to bare 12 V wire for LED strip lights and low-power cameras.
- Garage and workshop users making custom power leads for 12 V accessories.
- Anyone repairing a power cable whose original plug has failed.
Skip it for high-current loads, mains voltage, or outdoor use without extra weatherproofing.
How to check it fits your device
- Measure the barrel size of the socket on your device. Common sizes include 5.5 x 2.1 mm and 5.5 x 2.5 mm. They look nearly the same but are not identical.
- Know which way the fit tolerates mismatch. A 2.1 mm plug will fit loosely into a 2.5 mm socket and can lose contact. A 2.5 mm pin will not enter a 2.1 mm socket. So match the size you actually have.
- Check polarity. Many devices use centre-positive, but not all. The device label or manual usually shows a small symbol; reversing polarity can damage electronics.
- Confirm the current. The listing states 3 A at 12 V, so keep your load comfortably under that; most LED strips on a short run fit, a 60 W supply at full load does not.
- Check that your wire fits the screw terminal and strain relief. Thin hobby wire or very thick wire may not clamp securely.
Pros and limitations
Pros
- No soldering needed, so you can make or repair a lead quickly.
- A ten-piece set gives spares for mistakes and multiple projects.
- Common 5.5 mm barrel style works with many consumer and security devices.
Limitations
- Rated for 3 A at 12 V, so it is not for heavy loads.
- Screw terminals can loosen with vibration; recheck them and do not rely on them for critical machines.
- Not specified as weatherproof; outdoor use needs sealing or an enclosure.
- Exact socket fit depends on the maker of your device, which a listing cannot guarantee.
Wiring and safety tips
- Switch the supply off and unplug it before stripping or connecting wires.
- Strip only enough insulation to sit in the terminal, so no bare strands touch the sleeve.
- Match positive and negative to the pin and sleeve and mark the wire (stripe or colour) so you do not swap them.
- Use a multimeter to check polarity and voltage on the supply before plugging into the device.
- Add a small inline fuse near the power source on any new lead, especially around a workshop where cables get crushed.
- Keep these away from welding spatter, grinding sparks and moisture, which can corrode terminals or melt insulation.
Alternatives and related guides
- HAMRVL 12V LED power supply: a 12 V supply that these plugs can connect to
- Multi-voltage power adapter: an adjustable adapter, with its own polarity and tip checks
- Lemotech cable clips: for tidying low-voltage cable runs
- Stainless steel 14-pin male plug: a different connector type for multi-pin cables
Frequently Asked Questions
What size DC plug is a 5.5 x 2.5 mm connector?
It has a 5.5 mm outside diameter and a 2.5 mm centre pin hole. Many devices use 5.5 x 2.1 mm instead. Measure your socket, because a mismatch can cause loose contact or a plug that will not fit at all.
Is polarity the same for every barrel connector?
No. Many devices are centre-positive, but some are centre-negative. Check the symbol on your device or power supply and test with a multimeter before connecting. Reversed polarity can damage LEDs, cameras or electronics.
How much current can these connectors carry?
The listing gives a maximum of 3 A at 12 V. Stay comfortably below that and check your device wattage. A 12 V strip drawing 24 W is about 2 A, but heavier loads need a different connector.
Can I use these plugs outdoors?
Not without protection. The listing does not give a weather rating. Use a sealed enclosure, silicone and heat-shrink, or a weatherproof connector for outdoor lighting or cameras to keep moisture out of the terminals.
Final verdict
The GOSONO DC power plug connector pack is an easy way to terminate 12 V wire in a standard 5.5 x 2.5 mm barrel plug. Check the barrel size, polarity and current before you wire anything, and keep the connectors out of damp or spark-prone areas.
