SIPUN ST3-4 Spring Clamp Terminal Block

ZHEJIANG SIPUN ELECTRIC CO., LTD. offers the high-performance ST3-4 Feed-Through Terminal Block, engineered with reliable spring clamp technology. Designed for demanding electrical installations, this terminal block provides a robust and efficient solution for connecting conductors in control panels, switchgear, and diverse industrial applications requiring higher current capacity.

Key Specifications

• Conductor Cross-Section: Accommodates solid, stranded, and fine-stranded conductors with ferrules from 0.2 mm² to 6.0 mm².
• Rated Voltage: 800V.
• Rated Current: 32A.
• Standards Compliance: Meets stringent international and national safety and performance standards: IEC 60947-7-1, IEC 60947-7-2, GB14048.7, and GB14048.8.

Advantages of Spring Clamp Technology

The ST3-4 utilizes a proven spring clamp connection mechanism, delivering significant benefits over traditional screw terminals:

1. Rapid, Tool-Free Installation: Simply insert the conductor directly into the terminal opening – the internal spring mechanism securely clamps it instantly. Eliminates the need for screwdrivers during initial wiring, significantly speeding up installation time.
2. Consistent, Reliable Connection: The spring exerts constant, optimal contact force, ensuring a gas-tight connection resistant to vibration and thermal cycling. Minimizes the risk of loosening over time for enhanced long-term reliability.
3. Effortless Maintenance & Inspection: The design allows for straightforward visual inspection of the conductor position. A standard screwdriver can be inserted into the test opening to open the clamp for easy wire insertion, removal, or repositioning.
4. Reduced Risk of Installation Errors: The simple push-in action minimizes common errors associated with screw terminals, such as under-tightening or damaging fine strands during tightening.
5. Superior Vibration Resistance: The inherent constant force of the spring maintains a secure connection even in high-vibration environments, critical for industrial and transportation applications.
6. Long-Term Stability & Durability: High-quality spring materials and design ensure consistent contact pressure is maintained throughout the product’s operational lifespan.

Comprehensive System Solution

The ST3-4 terminal block integrates seamlessly with a range of accessories to form a complete wiring system:

• End Cover (Barrier): Cover ST3-4G provides essential finger protection and meets IP20 requirements.
• Jumpers: Fork type Jumper FBS 10-6 enables efficient bridging and potential distribution between adjacent terminals rated for the higher current.
• Marking: Marker ZB6 allows for clear, permanent, and professional circuit identification.

Applications

Ideal for applications requiring secure, high-current connections and efficient wiring:

• Power Distribution Panels & Switchgear
• Industrial Control Cabinets & Machinery
• Motor Control Centers (MCCs)
• Building Management Systems (BMS)
• Heavy-Duty HVAC Systems
• Renewable Energy Systems (e.g., Inverters)
• Railway and Transportation Equipment

Quality and Reliability Commitment

Manufactured by ZHEJIANG SIPUN ELECTRIC CO., LTD., the ST3-4 Spring Terminal Block is produced under stringent quality control processes. Compliance with IEC and GB standards guarantees consistent performance, safety, and durability. It represents a cost-effective and highly reliable connection technology solution for robust electrical systems.