ABB UK 2.5 N Terminal Block 64418017 | DIN Rail Screw Connection 24A 400V | Industrial Control

ABB UK 2.5 N Terminal Block – Industrial-Grade DIN Rail Connection Solution

The ABB 64418017 UK 2.5 N terminal block is a precision-engineered component designed for reliable electrical connections in industrial control panels, automation systems, and distribution cabinets. Utilizing advanced screw-clamp technology and DIN 35 rail mounting, this terminal block delivers secure conductor termination with 2.5mm² capacity, rated for 24A at 400V operation.

Ideal for control cabinet builders, system integrators, and industrial facility managers, this terminal block addresses critical challenges including loose connections, installation complexity, high-density wiring requirements, and long-term reliability in demanding environments. Its compact footprint and tool-free rail mounting enable rapid assembly while maintaining professional-grade performance.

Manufactured to IEC 60947-7-2 standards with German engineering precision, the UK 2.5 N series combines proven reliability, standardized dimensions, and universal compatibility. Whether you're designing new control systems or upgrading existing installations, this terminal block provides the foundation for safe, efficient electrical distribution. Contact our engineering team for application-specific guidance and volume pricing.

Core Features & Technical Advantages

• Secure Screw-Clamp Connection
  Captive screw design ensures consistent contact pressure across conductor cross-sections from 0.2mm² to 2.5mm², accommodating both solid and stranded wires. Reduces installation time by 40% compared to traditional spring-cage terminals while maintaining superior vibration resistance.
• DIN 35 Rail Mounting System
  Tool-free snap-on installation to standard 35mm DIN rails (EN 60715) with integrated locking mechanism. Allows flexible positioning, easy removal for maintenance, and high-density configurations up to 20 terminals per 100mm rail length.
• High Current Capacity
  Rated 24A continuous at 400V AC/DC with 6kV impulse voltage withstand. Suitable for motor control circuits, PLC I/O wiring, power distribution, and instrumentation loops in industrial environments up to 2000m altitude.
• Robust Polyamide Housing
  UL94 V-0 flame-retardant material withstands operating temperatures from -35°C to +100°C. Gray RAL 7035 finish provides clear visual identification, while the self-extinguishing construction meets stringent safety requirements for enclosed panels.
• Universal Compatibility
  Accepts accessories including end plates, partition plates, bridge connectors, and test plugs from ABB's modular system. Compatible with standard labeling systems for clear circuit identification and maintenance documentation.
• Certified Safety Standards
  IEC 60947-7-2, UL 1059, CSA C22.2 No. 158 certified. Meets IP20 protection rating for finger-safe operation. Compliant with RoHS and REACH regulations for global market acceptance.

Typical Application Scenarios

This terminal block excels in applications demanding reliable electrical connections, space efficiency, and long-term maintenance accessibility:

• Industrial Control Panels & MCC
  Provides organized wiring for motor control centers, VFD panels, and PLC cabinets. Handles control voltage circuits (24V DC/AC), signal wiring, and auxiliary power distribution. Ideal for automotive manufacturing, packaging machinery, and process automation systems.
• Building Automation & HVAC Systems
  Connects sensors, actuators, and control devices in BMS panels, chiller controls, and air handling units. Supports mixed voltage applications with proper isolation. Common in commercial buildings, data centers, and institutional facilities.
• Power Distribution & Switchgear
  Facilitates neutral and ground connections in low-voltage distribution boards. Enables modular panel design with standardized wiring practices. Used in electrical rooms, substations, and industrial power systems.
• Instrumentation & Process Control
  Terminates 4-20mA analog signals, thermocouple wiring, and fieldbus connections. Maintains signal integrity through secure contact and proper conductor support. Applied in chemical plants, oil & gas facilities, and water treatment systems.

Technical Specifications & Selection Guide

To ensure optimal performance and compliance, review these key specifications when selecting terminal blocks for your application:

Selection Considerations: When specifying terminal blocks, evaluate conductor size (AWG/mm²), current load with derating factors, voltage class, environmental conditions (temperature, humidity, vibration), and required accessories (end stops, markers, test points). For applications exceeding 24A or requiring higher voltage ratings, consult our UK 4 N or UK 6 N series. Our application engineers can assist with panel layout optimization and compliance verification.

Extended Functionality & System Integration

• Modular Accessory System: Compatible with ABB's comprehensive range of accessories including ZK series end plates, ST series partition plates, QTC test plugs, and multi-level bridge connectors for potential distribution.
• Labeling & Documentation: Accepts standard 5mm label strips and UCK-5 marking carriers. Supports laser-printed, thermal-transfer, and handwritten identification methods for clear circuit tracing and maintenance records.
• High-Density Configurations: Combine with UK-SILED series LED indicator terminals and UK-REUT series fuse holder terminals on the same rail for integrated monitoring and protection within minimal panel space.
• International Standards Compliance: Designed to harmonized IEC standards ensuring global project acceptance. Meets NEC, CEC, and IEC 60204-1 requirements for machine control panels.

Delivery, Service & Quality Assurance

Availability & Lead Time: Standard catalog items ship within 3-5 business days from our regional distribution centers. Volume orders and project-specific configurations available with 7-14 day lead time. Expedited shipping options available for urgent requirements.

Quality Guarantee: All products carry ABB's standard 24-month warranty covering manufacturing defects. Extended warranty programs available for critical applications. Each terminal block undergoes automated electrical testing and dimensional verification before shipment.

Technical Support: Our application engineering team provides pre-sales consultation, panel layout review, and specification assistance. Post-installation support includes troubleshooting guidance, replacement part identification, and upgrade recommendations. Remote and on-site commissioning support available by region.

Documentation Package: Complete technical data sheets, installation instructions, CAD drawings (2D/3D), and electrical schematics provided with each order. Certificates of compliance and material declarations available upon request for project documentation requirements.

Frequently Asked Questions (FAQ)

Q: How do I install ABB UK 2.5 N terminal blocks on DIN rail?
A: Position the terminal block at a 45° angle to the DIN rail, hook the rear slot over the rail edge, then press down until the spring-loaded latch clicks into place. No tools required. To remove, insert a flat screwdriver into the release slot and lift the terminal off the rail. Ensure rail is clean and free of burrs for secure mounting.

Q: What wire sizes are compatible with this terminal block?
A: The UK 2.5 N accepts solid or stranded conductors from 0.2mm² to 2.5mm² (24-14 AWG). For flexible wires, use insulated ferrules to prevent strand breakage. Strip length should be 8-9mm. Maximum two conductors per connection point when using 1.5mm² or smaller wire.

Q: Can I use these terminal blocks in outdoor or harsh environments?
A: The UK 2.5 N is rated IP20 and designed for indoor panel mounting. For outdoor applications, install within NEMA 4X or IP65-rated enclosures. The polyamide housing resists most industrial chemicals, oils, and solvents. For extreme temperatures below -35°C or above +100°C, consult our engineering team for alternative materials.

Q: How many terminal blocks fit on a standard DIN rail?
A: With a width of 5.2mm per terminal, you can mount approximately 192 UK 2.5 N blocks on a 1-meter DIN rail. Practical density is typically 180-185 terminals per meter when accounting for end plates, partition plates, and wire bending radius. Use our panel layout calculator for project-specific configurations.

Q: Are these terminal blocks compatible with other manufacturers' accessories?
A: While ABB terminal blocks follow IEC dimensional standards, we recommend using ABB-branded accessories (end plates, bridges, markers) to ensure mechanical fit and maintain warranty coverage. Cross-compatibility with Phoenix Contact, Weidmüller, and Wago accessories may vary by specific part number.

Q: What torque specification should I use for wire termination?
A: Tighten the M3 captive screws to 0.5-0.6 Nm (4.4-5.3 lb-in) using a calibrated torque screwdriver. Over-tightening can damage conductor strands or crack the housing. Under-tightening may result in high resistance connections and overheating. Re-torque connections after initial heat cycle in high-current applications.

Get Expert Selection Assistance

For detailed application engineering, custom panel layouts, or volume quotations, please provide our team with the following project information:

• Application type and industry sector
• Conductor sizes and current requirements
• Voltage levels and isolation needs
• Environmental conditions (temperature, humidity, vibration)
• Panel dimensions and DIN rail configuration
• Required certifications and compliance standards
• Quantity requirements and delivery timeline

Our application engineers will provide personalized recommendations, technical drawings, and competitive pricing within 24 hours. We support design reviews, compliance verification, and installation training for complex projects.

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