ZHEJIANG SIPUN ELECTRIC CO., LTD. – ST3-2.5/2-2 Double Deck Spring Terminal Block

Product Overview

ZHEJIANG SIPUN ELECTRIC CO., LTD. presents the ST3-2.5/2-2 Double Deck Spring Terminal Block, a high-performance electrical connectivity solution designed for industrial applications requiring reliable and efficient wiring. This terminal block incorporates advanced spring clamp technology and a double-deck, two-in-two-out configuration, making it ideal for control panels, switchgear, and power distribution systems where space optimization and reliable connections are critical.

Technical Specifications

Product Applications & Usage

The ST3-2.5/2-2 double-deck terminal block features a unique two-in-two-out configuration that enables efficient electrical distribution in compact spaces. This design is particularly beneficial for:

• Space-Optimized Control Cabinets: The double-level vertical design saves significant space compared to traditional single-level terminals, allowing for higher density installations
  
• Dual Circuit Distribution: Enables independent control of two separate circuits within a single terminal block footprint
• Industrial Control Systems: Suitable for PLCs, motor control centers, and automation systems where multiple connections are required in limited space
  
• Power Distribution Panels: Ideal for applications requiring reliable connections in compact switchgear and distribution boards
• Signal Duplication & Branching: Perfect for applications where signals or power need to be distributed to multiple devices simultaneously

Spring Clamp Technology Advantages

Spring clamp terminals utilize spring tension to secure cables, providing electrical connection through mechanical spring force. This technology offers significant benefits:

1. Tool-Free Operation & Rapid Installation
   Conductors can be connected directly by insertion without special tools, significantly reducing wiring time compared to traditional screw terminals
   
2. Exceptional Vibration Resistance
   The constant spring force maintains stable electrical connections even in high-vibration environments, preventing loosening that can lead to contact failure
   
3. Self-Adjusting Contact Pressure
   The spring mechanism automatically compensates for thermal expansion and contraction, maintaining optimal contact pressure throughout thermal cycling
   
4. Visual Inspection Capability
   Transparent housing design allows for quick verification of proper wire insertion and connection status without disassembly
5. Maintenance-Friendly Design
   Integrated test opening facilitates easy circuit testing and wire modifications. Maintenance is simplified as wires can be easily inserted and removed
6. Long-Term Stability
   High-quality spring materials maintain tension without significant attenuation over time, ensuring consistent performance throughout the product’s operational lifespan
   
7. Corrosion Resistance
   Quality spring mechanism prevents oxidation, enhancing long-term reliability in various environmental conditions

Space-Saving Design Benefits

The double-deck design of the ST3-2.5/2-2 terminal block provides exceptional space efficiency:

• Compact Dimensions: Optimized footprint for high-density installations
  
• Vertical Integration: Dual-level design accommodates multiple connections in minimal space
  
• Efficient Layout: Enables more connections per unit length of DIN rail compared to single-level alternatives
• Simplified Wiring: Reduces wiring complexity by integrating multiple connection points within a compact form factor

Comprehensive System Solution

The ST3-2.5/2-2 terminal block integrates seamlessly with a range of accessories to form a complete wiring system:

• Protective End Cover: Cover ST3-2.5/2-2G provides finger protection and meets IP20 requirements
• Interconnection: Fork type Jumper FBS 10-5 enables efficient bridging between adjacent terminals
• Identification: Marker ZB5 allows for clear, permanent circuit identification
• Mounting: Compatible with standard 35mm DIN rails

Compliance Standards

• IEC 60947-7-1 & IEC 60947-7-2
• GB14048.7 & GB14048.8
• CE Certified
• RoHS Compliant

Quality Assurance

Manufactured by ZHEJIANG SIPUN ELECTRIC CO., LTD. under strict quality control processes:

• 100% electrical testing
• Mechanical endurance testing
• Environmental resistance testing
• Thermal cycling testing to ensure performance stability

The ST3-2.5/2-2 Double Deck Spring Terminal Block represents an innovative, space-saving solution for modern electrical distribution requirements, combining the reliability of spring clamp technology with the efficiency of double-deck design for optimized panel layout and simplified wiring.