ZHEJIANG SIPUN ELECTRIC CO., LTD. presents the ST3-2.5, a high-performance feed-through terminal block utilizing advanced spring clamp technology. Designed for reliability and efficiency in electrical installations, this terminal block offers a robust solution for connecting conductors within control panels, switchgear, and various industrial applications.
Key Specifications
- Conductor Cross-Section: Accommodates solid, stranded, and fine-stranded conductors with ferrules from 0.2 mm² to 4.0 mm².
- Rated Voltage: 800V.
- Rated Current: 24A.
- Standards Compliance: Meets rigorous international and national safety and performance standards including IEC 60947-7-1, IEC 60947-7-2, GB14048.7, and GB14048.8.
Advantages of Spring Clamp Technology
The ST3-2.5 utilizes a proven spring clamp mechanism, offering significant benefits over traditional screw terminals:
- Fast, Tool-Free Installation: Conductors are inserted directly into the terminal opening and securely clamped by the internal spring mechanism. No screwdriver is required for initial connection, drastically reducing installation time.
- Highly Reliable Connection: The constant force exerted by the spring ensures a gas-tight, vibration-resistant connection over the long term, minimizing the risk of loosening due to thermal cycling or mechanical stress.
- Easy Maintenance & Inspection: The direct-access design allows for simple visual inspection of the conductor. A standard screwdriver can be used to open the clamp via the test opening for adding, removing, or repositioning wires quickly and safely.
- Reduced Installation Errors: Simplified insertion reduces the potential for errors like under-tightening (common with screw terminals) or damaging fine-stranded wires during tightening.
- Excellent Vibration Resistance: The spring’s constant pressure maintains contact force even under demanding conditions with significant vibration, enhancing connection reliability.
- Long-Term Stability: The spring material and design are engineered to provide consistent contact force throughout the product’s service life.
Complete System Solution
The ST3-2.5 terminal block is part of a comprehensive system. Compatible accessories include:
- End Cover (Barrier): Cover ST3-G provides finger protection and meets IP20 requirements.
- Jumpers: Fork type Jumper FBS 10-5 enables efficient potential distribution between adjacent terminals.
- Marking: Marker ZB5 allows clear and permanent circuit identification.
Applications
Ideal for a wide range of applications requiring secure and efficient wiring, including:
- Control Cabinets & Switchgear
- Power Distribution Systems
- Industrial Machinery
- Building Automation
- HVAC Systems
- Transportation Equipment
Quality and Reliability
Manufactured by ZHEJIANG SIPUN ELECTRIC CO., LTD., the ST3-2.5 Spring Terminal Block is produced under strict quality control to ensure consistent performance and durability, backed by compliance with IEC and GB standards. It offers a cost-effective and highly reliable connection technology for demanding electrical environments.
Post time: Aug-11-2025