Barrier Terminal Blocks

Product Overview

Barrier terminal block, safe separation design, series selection.

Isolation design: built-in partition to prevent circuit short circuit or cross connection.
Multi-wiring port: supports multiple electrical connections to meet complex circuit requirements.
Flame retardant material: flame retardant material is selected to improve fire resistance and safety.
High current carrying: optimized conductive design, suitable for high current applications.
Easy maintenance structure: clear markings for easy daily inspection and maintenance.

Key Advantages

Safe Circuit Isolation
Each pole is separated by molded barriers that prevent accidental contact between adjacent conductors, reducing the risk of short circuits and electrical faults.
High Mechanical Strength
The molded PA66 housing resists impact, vibration, and temperature extremes, ensuring stable performance in harsh environments.
Flexible Conductor Accommodation
Models support a wide wire range—from 0.5 mm² up to 25 mm²—allowing mixed-gauge installations within a single assembly.
Simple Screw-Clamp Termination
Integrated brass-clad terminal screws deliver reliable torque retention, unaffected by thermal cycling or vibration, for long-term stability.
Modular & Expandable
Standardized pitch and base dimensions ensure easy panel layout and the ability to add or remove poles quickly by snapping sections into place.
Clear Marking & Identification
Dedicated labeling channels above each pole allow insertion of printed or hand-written markers, speeding up maintenance and troubleshooting.
Cost-Effective Design
The UN Series balances performance and affordability, making barrier blocks an excellent choice for both entry-level and high-end panels.

Product Catagories

LEIPOLE Barrier Terminal Blocks provide a robust, economical solution for secure wire termination and circuit segregation in industrial and commercial control panels. Featuring a solid plastic housing with integrated insulating barriers between poles, these blocks prevent accidental shorting and facilitate neat, organized wiring. The UN Series of Barrier Terminal Blocks offers multiple conductor capacities and configurations, making them ideal for applications ranging from simple distribution to complex interlocking circuits.

Part Number	Rated Current / Rated Voltage	SIZE	cross section	AMG	Model	wdt_ID	wdt_created_by	wdt_created_at	wdt_last_edited_by	wdt_last_edited_at
UN 10	10A / 600V	17 x H33.5 x W38	1.25mm²	22-16		13	Kiva	13/06/2025 09:11 AM	Kiva	16/06/2025 05:12 AM
UN 10W	10A / 600V	T8 x H33 x.5 W38	1.25 mm²	22-14		21	Kiva	16/06/2025 05:40 AM	Kiva	16/06/2025 05:40 AM
UN 15	15A / 660V	T10.5 x H33.5 x W38	2mm²	22-14		22	Kiva	16/06/2025 05:43 AM	Kiva	16/06/2025 05:43 AM
UN 10L	10A / 600V	T7 x H33.5 x W38	1.25mm²	22-16		23	Kiva	16/06/2025 06:03 AM	Kiva	16/06/2025 06:03 AM
UN 10LW	10A / 600V	H8 x H33.5 x W38	1.25mm²	22-14		24	Kiva	16/06/2025 06:04 AM	Kiva	16/06/2025 06:04 AM
Part Number	Rated Current / Rated Voltage	SIZE	cross section	AMG	Model

UN Series – Barrier Terminal Blocks LEIPOLE’s UN Series offers several variants optimized for different conductor capacities and mounting preferences. All UN models share a common footprint and barrier design but differ in current and voltage ratings, pole-counts, and wire-range:

Part Number	Rated Voltage	Rated Current	Rated applicable wire	terminal screw	Model	wdt_ID	wdt_created_by	wdt_created_at	wdt_last_edited_by	wdt_last_edited_at
UN200BW	600V	240A /FIXED:200A	100mm²	M10		13	Kiva	13/06/2025 09:11 AM	Kiva	17/06/2025 02:59 AM
UN200BK	600V	240A /FIXED:200A	100 mm²	M10		21	Kiva	16/06/2025 05:40 AM	Kiva	17/06/2025 03:00 AM
UN300BW	600V	310A	150mm²	M10		40	Kiva	17/06/2025 03:01 AM	Kiva	17/06/2025 03:01 AM
UN300BK	600V	310A	150mm²	M10		41	Kiva	17/06/2025 03:02 AM	Kiva	17/06/2025 03:02 AM
UN400BW	600V	370A	200mm²	M12		42	Kiva	17/06/2025 03:03 AM	Kiva	17/06/2025 03:03 AM
Part Number	Rated Voltage	Rated Current	Rated applicable wire	terminal screw	Model

Applications

Industrial Control Panels: Provide isolated termination points for control relays, motor starters, and signal circuits, ensuring clear separation between inputs and outputs.
Power Distribution Subpanels: Serve as convenient feed-through points for branch circuits, allowing larger conductors to be routed neatly.
Building Automation Systems: Terminate wiring for HVAC controllers, fire alarm panels, and security systems, keeping low-voltage and control circuits segregated.
Machine Tool Wiring: Organize sensor, actuator, and solenoid connections in CNC machines and automated equipment, reducing downtime during maintenance.
Renewable Energy Inverters: Manage DC bus wiring and protective device interconnections in solar and wind inverter enclosures.
Elevator & Escalator Control: Separate power and control wiring for safety circuits and drivetrain monitoring.

Basic Knowledge

What Is a Barrier Terminal Block?A barrier terminal block uses an insulating plastic barrier between adjacent conductor clamps. This barrier prevents accidental contact or short circuits between live conductors, especially in multi-pole assemblies.Why Choose Barrier Blocks Over Standard Feed-Through Blocks?

Enhanced Safety: Barriers ensure that even if insulation breakdown or conductor movement occurs, adjacent poles remain isolated.
Simplified Troubleshooting: Visible separation makes it easy to identify and trace individual circuits.
Higher Voltage Support: Barrier blocks often have higher clearance and creepage distances, enabling higher voltage ratings.

Key Specifications to Consider

Conductor Capacity (mm²/ AWG): Determines which wire sizes can be terminated.
Current & Voltage Ratings (A/V): Must exceed the maximum load current and system voltage.
Pole Count: Number of individual conductors that can be terminated within one block.
DIN Rail Compatibility: Verify NS 35/7.5 vs. NS 35/15 mounting based on panel design.

Why Choose Leipole?

As a professional buyer, do you face these challenges?

Delivery delays – affecting project progress and production line stability

Poor technical adaptability – standard products cannot meet complex working conditions

High hidden costs – frequent maintenance, excessive energy consumption, slow after-sales response

Compliance risks – lack of international certification leads to customs clearance and warranty disputes

Leipole is proud to offer one-stop solution:

Global layout, zero delivery delays

R&D and sales headquarter led by the team in Singapore – cutting-edge cooling technology iteration to ensure product leadership
Manufacturing base in Shanghai, China – ISO 9001 & ISO14001 certified, cost optimization + high quality control standards
Localized warehousing in 24 countries – spot shipments from the EU, America, and Southeast Asia, urgent orders arrive within 3 days

Deep customization capabilities to solve complex needs

OEM/ODM full-case support – from cooling structure design to branding customization, 100+ successful cases (Industrial Automation/ New Energy Industry/Data Centers)
Working condition simulation test – Free simulation of air volume, high temperature, high humidity and vibration environment to ensure 100% adaptability of the solution

Worry-free compliance, global access

Authoritative certification – CE, UL, RoHS, REACH full coverage, hassel-free customs clearance in Europe, America and Southeast Asia

Cost optimization throughout the entire life cycle

Energy consumption reduced by 30% – patented airflow design, saving 30% in electricity bills per year compared to peer product
1-year warranty – redundant design of key components, failure rate <0.2%
7×24 localized service – 50+ national technical teams, 4-hour response, direct supply of spare parts.

Customization Process

Accurate Demand Analysis

Professional engineers deeply understand your equipment parameters, application environment, and special requirements.

Customized Technical Solutions

R&D teams develop optimal heat dissipation solutions based on your needs, including airflow calculations and installation planning.

Sample Testing and Validation

Provide samples for real-environment testing, collect data feedback, and ensure solution effectiveness.

Mass Production

After confirming the solution, production follows strict ISO9001 quality management systems to ensure batch stability.

FAQ

Q1: Can I mix different UN Series blocks on the same DIN rail?
Yes. All UN Series blocks share identical rail-mount dimensions, allowing you to combine UN2.5, UN4, UN6, and UN10 models on the same 35 mm DIN rail for a compact multi-pole assembly.Q2: How do I label each circuit on a barrier block?
Use compatible marker strips or printed sachets inserted into the integrated marking slot above each pole. This ensures clear, legible identification for maintenance.Q3: Are these barrier blocks suitable for both AC and DC applications?
Yes. UN Series blocks are rated for up to 800 V AC/DC, making them appropriate for AC control circuits and DC distribution wiring alike.Q4: What torque should I use when tightening the screws?
Tighten screws to the specified torque values: 0.6–0.8 Nm for UN2.5 and UN4, and 1.2–1.4 Nm for UN6 and UN10. Proper torque ensures reliable contact without damaging conductors.Q5: Can I add end stops to prevent block movement?
Yes. End-stop clamps lock into the rail beside the last block to prevent accidental sliding. They are recommended for assemblies with frequent vibration.Q6: How do I ensure proper clearance between poles?
LEIPOLE barrier blocks have molded barriers with adequate clearance distances. For higher-voltage circuits, use UN6 or UN10 which have larger creepage and clearance ratings.

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