CNNILED UKK Series Power Distribution Blocks: Applications, Models and Installation

Oct 12, 2026

A power distribution block is the component that turns one incoming supply into a set of outgoing circuits inside an electrical cabinet. The CNNILED UKK series power distribution blocks are built for exactly that job: one incoming connection and multiple outgoing terminals, so that wiring stays organized in electrical cabinets and control panels. The range covers six models — UKK80, UKK125, UKK160, UKK250, UKK400 and UKK500 — with 6 or 11 outputs depending on the model.

At a glance

Models:	UKK80, UKK125, UKK160, UKK250, UKK400, UKK500
Configuration:	1 input with 6 or 11 outputs
Conductive components:	tin-plated brass
Insulating housing:	PC
Cover:	transparent blue, for visual inspection
Rated voltage:	690 V

What a Power Distribution Block Does in a Panel

Instead of running every outgoing conductor back to the main supply, a power distribution block centralizes the connection in one place. A single incoming conductor feeds the block; the outgoing terminals then distribute power to the protected outgoing circuits. Because each conductor lands on a defined terminal position instead of a shared busbar or a loose bundle of wires, the cabinet is easier to trace, easier to inspect and faster to maintain.

UKK Series Models: 1 Input with 6 or 11 Outputs

The UKK range is divided into two groups by output count:

· UKK80, UKK125 and UKK160 — 1 input, 6 outputs

· UKK250, UKK400 and UKK500 — 1 input, 11 outputs

All six models follow the same construction principle: a single incoming terminal on one side, a row of outgoing terminals on the other, and a transparent blue cover over the conductive parts. Each power distribution block in the range is rated for 690 V, so one product family can be specified across different panel designs.

Key Features of the UKK Power Distribution Block

· 1 input with 6 or 11 outputs, depending on the model

· Tin-plated brass conductive components and a PA66 insulating housing

· Transparent blue cover for visual inspection

· Compact layout for organized cabinet wiring

· Rated voltage: 690 V (per the supplied product images)

Typical Applications

· Electrical distribution cabinets — a power distribution block centralizes the connections between the incoming supply and the protected outgoing circuits.

· Industrial control panels — the blocks organize connections for automation and machinery systems.

· Commercial electrical systems — they support orderly wiring in appropriately designed building-service panels.

Product Gallery

Original CNNILED-supplied product photographs. Each image is inserted without cropping or retouching.

Model Reference: Conductor Sizes and Dimensions

The table below summarises the conductor ranges and body dimensions shown on the supplied CNNILED product images.

Model	Outputs	Incoming conductor	Outgoing conductor ranges	Body L × H × W
UKK80	6	6–16 mm²	2.5–16 mm² / 2.5–6 mm²	69.2 × 45.9 × 29.5 mm
UKK125	6	6–16 mm²	10–35 mm² / 2.5–16 mm²	70.2 × 45.9 × 29.5 mm
UKK160	6	6–16 mm²	10–70 mm² / 2.5–16 mm²	70.2 × 45.9 × 29.5 mm
UKK250	11	35–120 mm²	6–35 mm² / 2.5–16 mm² / 2.5–10 mm²	95.7 × 48.9 × 50 mm
UKK400	11	95–185 mm²	6–35 mm² / 2.5–16 mm² / 2.5–10 mm²	95.7 × 48.9 × 50 mm
UKK500	11	Busbar 3 × 15 mm – 8 × 24 mm	6–35 mm² / 2.5–16 mm² / 2.5–10 mm²	95.7 × 48.9 × 50 mm

The three 6-output models share a compact 29.5 mm wide body, while the 11-output models use a wider 50 mm body to accommodate the additional terminals and larger incoming conductors. Confirm conductor ranges and dimensions against the current datasheet before ordering.

Installation Overview

Installing a UKK power distribution block follows four steps:

1. Select a model that matches the current rating, conductor sizes and required outputs.

2. With the supply isolated and verified de-energized, mount the block using its approved fixing method.

3. Connect the incoming and outgoing conductors according to the product datasheet and specified torque.

4. Secure the cover and complete inspection and electrical testing before energizing.

Important: Installation must be performed by qualified personnel. UKK blocks are connection devices, not substitutes for circuit breakers or fuses.

Choosing the Right Power Distribution Block

Three factors decide which power distribution block fits a panel: the current rating of the circuit, the conductor sizes on both the incoming and outgoing side, and the number of outgoing connections the panel requires. The six UKK models differ mainly in the conductor ranges they accept and in the number of outgoing terminals they provide. Checking those three values against the model reference table above is the quickest way to narrow the choice to one or two models. Where a single feed has to reach several protected circuits, the matching UKK model keeps that distribution inside a defined terminal block instead of a chain of separate connections.

Frequently Asked Questions

How many outputs does a UKK power distribution block have?

Six or eleven, depending on the model. UKK80, UKK125 and UKK160 provide 1 input and 6 outputs; UKK250, UKK400 and UKK500 provide 1 input and 11 outputs.

What is the rated voltage of the UKK series?

690 V, as stated on the supplied product images.

Can a UKK power distribution block replace a circuit breaker or a fuse?

No. UKK blocks are connection devices. They distribute power to the outgoing circuits but do not provide overcurrent protection, so circuit breakers or fuses remain necessary.

Who should install a UKK power distribution block?

Installation must be carried out by qualified personnel, following the product datasheet and the applicable local wiring regulations.

Contact CNNILED

For specifications, quotations and cooperation inquiries, contact CNNILED. | www.cnniled.com