















💡 Seal your connections with confidence — the last junction box you’ll ever need!
The Helunsi Waterproof Junction Box is a robust, IP68-rated 3-way electrical connector designed for outdoor and underground use. Constructed from durable PC plastic with silicone seals, it protects wiring from water, dust, UV, and corrosion. Compatible with cables 5mm to 14mm in diameter, it supports up to 450V and 24A, making it ideal for outdoor lighting, irrigation, solar setups, and more.














| ASIN | B07ZKCYFY6 |
| Best Sellers Rank | #168,975 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #319 in Electrical Boxes |
| Brand | Helunsi |
| Color | Black-1 Pack |
| Date First Available | October 24, 2019 |
| Finish Type | Hard PP plastic |
| Installation Type | Screw-In |
| Item Weight | 7.2 ounces |
| Item model number | AOS001 |
| Manufacturer | Helunsi |
| Material | Plastic |
| Product Dimensions | 4.96 x 3.54 x 1.81 inches |
| Specification Met | Ip68 |
| Style | 3 way waterproof junction box |
L**G
Excellent Quality
I am amazed at the quality of this little box.. First off, all the parts are included-nothing missing. Next up, everything for including the seals. Excellent product at a fair price.
R**.
Great product and inexpensive
These are actually pretty handy and inexpensive for what they are. They come with everything you need. I don’t use the terminal block that comes with it but I’m sure it’s fine.
L**E
Size
Item is exactly as shown. Seems to be keeping water out of the connections very well. I would not use the connection block that comes with but overall a good product!
J**.
These work! We buried them for speaker wire and still work perfect
This is amazing. Make sure you take your time with the connections and use the right little rubber pieces! Ours are buried and we use them for speaker wire. Still going strong!!
R**.
Compact Solution for small number terminations.
Application J box needed for 12 V DC on ATV and UTV, aftermarket external lights. “Compact solution” that will provide isolation from water and dirt. Mounting brackets molded into housing makes for easy install, screwed or zip tie mounting. Terminal block is loose with no securing system, EZ fix with RTV. Three sizes of cable glands and gasketed enclosure lid, splash proof but not sure I would say waterproof. Makes for clean install.
R**D
Nicely made
Out of the box this seems like a well-designed and well-made item. The set comes with two sizes of compressible grommets to handle different wire size. Haven't installed these yet but noticed that the smallest port gasket compresses down to much smaller than a 1/4" OD wire jacket so should be watertight for a range of (at least round) wires. The cover gasket fits well and it looks like the assembly screws will work well. The internal wire junction unfair but looks like each conductor snaps down like modern outlet wire captures.
K**.
Pleasantly surprised
They are smaller than they look in the picture.
H**T
Nice terminal block, gland fittings could use some more variety. Was also missing some screws.
The terminal block has lots of positions, which is nice. Similar junction boxes don't have as many, limiting their use. It comes with a few diameters of gland fittings (yellow rubber.) Would be nice to see a wider variety of them. I also think it should come with one that's totally solid (no hole) so you can start off with one in-one out (near the beginning of the project) and then expand to use the second output when the time is right. I also note that the screws it shipped with might be good for mounting the box to something, but not for sealing the lid. That requires smaller, shorter screws.
R**.
Worked for my underground wiring tie-in - caulked the holes too make sure.
R**D
These worked great and very happy with the quality
M**C
This is a good waterproof 3-outlet junction box. It allows you to connect at least 3 sets of wires while keeping the connection watertight. It comes with 3 compression fittings to make watertight connections, a set of large and small gasket to fit wires of various diameters, a bus bar to make wire connections, gasket and screws. I was able to fit a 1/2" wire with 4 x 12 awg conductions in one side and 2 x 10 AWG PV wire out on each of the other 2. If you use more than 1 wire or a wire that isn't round, the water proofing seal may not work right though. The included bus bar is only suitable for 14 awg or smaller so I used wired nuts inside the box. The larger box has good space to make connections and is highly recommended. Good usable size, all accessories included, but included bus bar would only fit 16 awg (maybe 14 awg) or smaller wires.
C**E
Tel que décrit, livraison rapide. la grandeur me convient.
J**N
Bon ratio qualité/prix
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