It has different specifications, such as one in and six out, one in and ten out, and one in and eleven out. It can meet a variety of cable branches. It adopts a flame-retardant shell and brass body.
| Dimensions | N/A |
|---|---|
| Model Number | UKK-125A, UKK-160A, UKK-250, UKK-400A, UKK-500A, UKK-80A |
| Rated Voltage | 690V |
| Connection Method | Screw Connection |
| Material of Shell | Nylon PA66 |
| Metal Material | Brass Nickel plated |
| Flame retardant | UL94V0 |
Zhejiang Shengling Electric Co., Ltd. is a professional manufacturer focused on the R&D and production of terminal blocks. With years of dedication to the electrical connection industry, we have built strong manufacturing experience and reliable technical expertise.
For UKK distribution blocks, Shengling meets diverse market needs with solid manufacturing strength and mature production control.
UKK terminal blocks typically use flame-retardant PA66 insulated housings, with internal conductive components mostly made of brass and nickel-plated. The fastening screws are generally made of high-strength steel with electroplated surfaces to balance insulation safety, conductivity, and mechanical strength.
This material is resistant to deformation or releasing toxic fumes under high temperatures or short circuits, effectively isolating ignition sources and preventing faults from escalating into fires.
UKK terminal housings typically meet the V-0 flame retardant standard, meaning they self-extinguish within 3 seconds of the ignition source being removed after contact with a flame, without dripping burning material or causing further spread.
This material is resistant to deformation or releasing toxic fumes under high temperatures or short circuits, effectively isolating ignition sources and preventing faults from escalating into fires.
UKK typically uses DIN rail screw terminals/branch terminals. The connection method is very straightforward: first, disconnect the power, strip the wire ends, insert them into the terminal crimping position, and then tighten the screw to secure them.
If it is a flexible wire, it is usually more stable and safer to crimp the cold-pressed end first and then connect it to the terminal.
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Model | Rated current | Rated voltage | Structure | Input Cable size (mm2)*pcs | Output Cable size (mm2)*pc | Size | Installation method |
UKK-80A | 80A | 690V | 1 in, 6 out | 16*2 | (2.5-16)*1 (1.5-10)*4 | 30x69x49 | 35mm DINGuide |
UKK-125A | 125A | 690V | 1 in, 6 out | 35*1 16*1 | （2.5-16）*6 | 29x77x46 | 35mm DIN Guide |
UKK-160A | 160A | 690V | 1 in, 6 out | 70*1 16*1 | （2.5-16）*6 | 29x77x46 | 35mm DIN rail/screw Fixing |
UKK-250A | 250A | 690V | 1 in 11 out | 120*1 | （6-35）*2 （2.5-25）*4 （2.5-16）*5 | 47x96x50 | 35mm DIN rail/screw Fixing |
UKK-400A | 400A | 690V | 1 in 11 out | 175*1 | （6-35）*2 （2.5-25）*4 （2.5-16）*5 | 47x96x50 | 35mm DIN rail/screw Fixing |
UKK-500A | 500A | 690V | 1 in 11 out | 8*25 | （6-35）*2 （2.5-25）*4 （2.5-16）*5 | 49x96x50 | 35mm DIN rail/screw Fixing |
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Yes, but it depends on the rated current of the specific model. Common UKK models on the market include 80A, 125A, 160A, 250A, 400A, 500A, etc. Different specifications correspond to different current carrying capacities and cannot be mixed.
The common configuration is a flame-retardant insulating shell + brass or copper conductor. Some products will be surface-plated to improve conductivity and corrosion resistance. Material details of different manufacturers will vary.
Most conventional UKK single pole junction boxes are better suited for indoor distribution or cabinet installation. If it is used outdoors, additional considerations are usually required to be waterproof, moisture-proof, dustproof and corrosion-proof. If necessary, a protective box should be added or a higher protection level solution should be selected.
The most common are:
Wire diameter and terminal specifications do not match
Crimping/locking wires are not in place, resulting in looseness and heat generation
Conductor not fully inserted
Torque is too large or too small
Multiple stranded wires are not handled properly, resulting in virtual connections
These are typical failure points for terminal blocks and branch distribution blocks.
A slight temperature rise may exist when the power is on, but if it is obviously hot to the touch, the shell is discolored, and there is a burnt smell, it usually indicates an abnormality, such as overload, excessive contact resistance, loose wiring, small wire diameter, etc.
The premise is that the parameters of the product itself are compliant, the installation specifications are met, and the load does not exceed the standard. Industry data generally emphasizes that such power distribution components should be powered off during installation and maintenance, and the fixation, identification, and insulation status should be confirmed before being put into operation.
Can one enter and multiple exits be used? Yes, UKK itself is used for branching and distribution.
Can it be mounted on the guide rail? Most UKK series support DIN rail mounting.
Can it be used outdoors? It is not recommended to wear the regular model naked outdoors, and protection is required.
Will it burn? There are risks in incorrect selection, overloading, and loose crimping.
How to choose a model? Choose according to the current, wire diameter, number of outlet positions, and installation environment.
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