Product Introduction:Double Deck Terminal Block SUK-2.5/2-2, SUK-4/2-2

ZHEJIANG SIPUN ELECTRIC CO LTD specializes in manufacturing high-performance double-layer terminal blocks, designed to meet rigorous industrial standards while offering versatility and reliability in electrical connectivity. The SUK series, including models SUK-2.5/2-2SUK-4/2-2, and SUK-2.5M/2-2, exemplifies the company’s commitment to innovation and adaptability across diverse applications.


Key Features of SUK Series Terminal Blocks

  1. Robust Electrical Performance
    • Wide Wire Compatibility: Supports conductor cross-sections ranging from 0.2 mm² to 4 mm² (AWG 24–12), accommodating both rigid and flexible wires with or without insulated sleeves.
    • High Current Capacity: Rated currents up to 28 A (for 4 mm² conductors) and maximum load currents of 32 A, ensuring stable performance under demanding conditions.
    • Voltage Ratings: Operates efficiently at 500 V, with surge voltage resistance up to 6 kV, ideal for environments requiring overvoltage protection.
  2. Durable Mechanical Design
    • Double-Layer Structure: Each layer provides 2 connection points, optimizing space utilization in control cabinets and distribution systems.
    • Temperature Resilience: Operational temperature range of -60°C to +110°C, with flame-retardant insulation material (UL 94 V0-rated PA) for enhanced safety in extreme environments.
  3. Certifications and Compliance
    • Meets IEC 60947-7-1 standards for terminal block safety and performance.
    • Compliant with CE, RoHS, and ISO certifications, ensuring environmental and quality adherence.
    • Validated for railway applications (e.g., DIN EN 45545-2 fire protection standards), making it suitable for transportation and heavy machinery sectors.

Model-Specific Highlights

Model Key Specifications
SUK-2.5/2-2 - Rated cross-section: 2.5 mm²
- Nominal current: 24 A
- Stripping length: 8–10 mm 
SUK-2.5M/2-2 - Rated cross-section: 2.5 mm²
- Nominal current: 24 A
- Stripping length: 8–10 mm 
SUK-4/2-2 - Rated cross-section: 4 mm²
- Nominal current: 32 A
- Pollution degree: 3 

Application Scenarios

  • Industrial Automation: Streamlines wiring in PLCs, motor controls, and sensor networks.
  • Railway Systems: Certified for use in rail vehicles due to fire-resistant properties and vibration tolerance.
  • Energy Distribution: Efficiently manages power distribution in switchgear and renewable energy installations.

Advantages Over Conventional Solutions

  • Space Efficiency: Dual-layer design reduces footprint by 30% compared to single-tier terminals.
  • Maintenance-Friendly: Transparent housing or color-coded layers (e.g., blue for neutral lines) simplify troubleshooting.
  • Cost-Effective: Combines high durability with competitive pricing, ideal for large-scale industrial projects.

For detailed technical drawings, test reports, or customization options, visit www.sipun-electric.com or contact SIPUN’s technical support team.


This introduction leverages SIPUN’s technical strengths while aligning with global standards, positioning the SUK series as a versatile and reliable choice for modern electrical infrastructure.

SUK-4@2-2


Post time: Feb-18-2025