Splitting one incoming supply into several outgoing circuits requires more than a convenient connection point. The JINH JHUKK series gives you defined copper-conductor terminals from 80A to 500A, helping you organize local power distribution inside control panels and electrical equipment.
A Defined Point for Local Power Distribution
When one feeder must supply several branch circuits, an improvised connection can make the panel difficult to assemble and inspect. A power distribution block provides a defined input and multiple output terminals in one insulated unit.
This structure helps you separate the main incoming conductor from the smaller outgoing conductors. It also gives you a clear place to inspect each branch connection.
You can use a standard JHUKK block to connect and distribute power. You still need the fuses, circuit breakers, disconnects, or other protective devices required by your electrical design.
JHUKK Current Ratings from 80A to 500A
The JHUKK single-pole distribution block range includes the following rated-current options:
| Model | Rated current | Rated voltage |
|---|---|---|
| JHUKK80 | 80A | 690V IEC |
| JHUKK125 | 125A | 690V IEC |
| JHUKK160 | 160A | 690V IEC |
| JHUKK250 | 250A | 690V IEC |
| JHUKK400 | 400A | 690V IEC |
| JHUKK500 | 500A | 690V IEC |
The current value is only the first selection point. You must also match the main input, every outgoing conductor, the number of required branch connections, the panel layout, and the expected operating environment.
You can use a smaller model for compact local distribution when the conductor sizes and load remain within its limits. Choose a higher-current model when you need a larger input and output arrangement. Do not treat the models as interchangeable simply because they look similar.
Designed for Copper Conductors
You can use JHUKK distribution blocks only with copper conductors. Do not connect aluminum conductors to this series.
This point should be confirmed early in your project. A conductor that physically fits into a terminal is not automatically compatible with its contact material and connection design. If your project uses aluminum conductors, choose a product specifically designed and documented for that conductor material.
For copper wiring, provide the supplier with the exact incoming and outgoing conductor sizes. Do not describe the project only as “125A” or “400A.” Two projects with the same nominal current may use different conductor constructions, branch counts, and enclosure layouts.
Materials and Inspection Features
The JHUKK series uses a PA nylon insulated shell with a UL94 V-0 material grade. Its conductive components are made from nickel-plated brass. You can check the cable position through the transparent cover during a routine visual inspection.
The transparent cover helps you inspect the connection, but it does not prove that you prepared or secured the conductor correctly. You should still strip the wire correctly, insert it fully, and inspect the connection before you energize the panel.
When you compare products from different suppliers, check the material specification and internal terminal arrangement rather than relying on housing color. Similar blue covers can hide significant differences in metal structure, conductor capacity, and terminal layout.
Installation on TH35 DIN Rail
JHUKK distribution blocks are generally installed on a TH35 DIN rail. This allows you to position the block with other rail-mounted control-panel components and maintain a structured wiring layout.
Before finalizing the design, check:
- The available DIN rail length and clearance around the block
- The space required to route the incoming conductor
- The bend radius and exit direction of all outgoing conductors
- Access for installation and later inspection
- The distance from other heat-generating or protective components
- The required cover and enclosure clearance
A product may fit on the rail but still leave too little space for larger conductors. Compare its dimensions with your panel drawing, then check the layout with a physical sample.
Where the JHUKK Series Fits
Industrial control panels
You can use an appropriately rated JHUKK block to distribute an incoming supply to several panel circuits. A defined distribution point makes the branch layout easier to trace during assembly and service.
Machinery and electrical equipment
When you build repeated machines, you can use the same approved distribution layout in every unit. This keeps your bill of materials consistent and makes the connection arrangement easier to recognize.
Commercial electrical cabinets
You can use the series for local power branching when your voltage, current, conductor sizes, and installation conditions match the selected model.
Lighting and solar support cabinets
If your lighting or solar support cabinet uses one incoming supply for several circuits, select the model from the actual load and conductor schedule. Do not select it from the application name alone.
How to Select the Correct Model
Follow this sequence before requesting a quotation:
- Record the system voltage and design current.
- Confirm that every conductor is copper.
- List the main incoming conductor cross-section.
- List every outgoing conductor cross-section.
- Count the number of outgoing circuits.
- Check the available TH35 rail and enclosure space.
- Compare the information with the exact model drawing and specification.
- Test a sample in the intended panel layout before approving bulk production.
This process helps you avoid a block with the right current marking but the wrong terminal arrangement. Make sure the model accepts both your incoming conductor and every required outgoing conductor.
What to Check Before Ordering
If you plan to stock several JHUKK models, build the range around real demand. Smaller current ratings may serve compact panels and equipment. The 250A, 400A, and 500A models address larger power-distribution requirements.
Before ordering, confirm:
- The model number and rated current on the product and packaging
- The input and output conductor ranges
- The number of connection openings
- The product dimensions
- The copper-conductor limitation
- The TH35 DIN rail installation requirement
- Batch identification and packaging quantity
- Available drawings and model-specific documents
You can review the complete power distribution block range, inspect the UKK500 distribution block, or read how distribution blocks support control-panel wiring.
Conclusion
Choose a JHUKK block by current, copper conductor sizes, output count, and available TH35 rail space. Send JINH your conductor schedule and panel layout to compare models and request samples before bulk ordering.
FAQ
How do you choose between JHUKK80, 125, 160, 250, 400, and 500?
Start with your design current. Then check your main input conductor, outgoing conductor sizes, output count, and panel space. Do not select the model by current rating alone.
What is the rated current of JHUKK500?
The JHUKK500 rated current is 500A. You must also verify that its input arrangement, outgoing terminals, voltage rating, and dimensions match your application.
Can JHUKK distribution blocks connect aluminum conductors?
No. The JHUKK series is intended for copper conductors and must not be used with aluminum conductors.
How are JHUKK distribution blocks mounted?
They are generally mounted on a TH35 DIN rail. Check the exact product dimensions, rail space, conductor routing, and enclosure clearance before finalizing the panel layout.
Does a JHUKK block provide overcurrent protection?
No. A standard JHUKK distribution block provides electrical connection and power branching. Your system must use the required protective devices separately.
Can one JHUKK block be used for several phases?
The JHUKK series uses a single-pole structure. For a multi-phase design, you normally need separate, clearly identified blocks for each phase or potential. Confirm the arrangement in your complete panel design.
What information should you send when requesting a sample?
Provide the voltage, current, copper conductor sizes, number of outputs, panel dimensions, TH35 rail layout, operating environment, destination market, and expected order quantity.
Can JINH supply customized packaging?
Custom labels and packaging can be discussed for eligible orders. Send your packaging format, artwork, labeling requirements, quantity, and target market with the inquiry.
