SIPUN ST3-10 Spring Clamp Terminal Block

ZHEJIANG SIPUN ELECTRIC CO., LTD. presents the ST3-10 high-capacity feed-through terminal block, engineered with advanced spring clamp technology for superior electrical connectivity in demanding industrial applications. Designed for robust performance, this terminal block ensures reliable power distribution in control systems, power cabinets, and heavy-duty equipment requiring higher current capacity.

Technical Specifications

• Conductor Cross-Section: 1.5 mm² to 16.0 mm²
• Rated Voltage: 800V AC/DC
• Rated Current: 65A
• Operating Temperature: -40°C to +120°C
• Contact Material: High-conductivity copper alloy, tin-plated
• Housing Material: PA66 (UL94 V-0 rated)
• Spring Material: High-grade stainless steel

Spring Clamp Technology Advantages

Spring clamp terminals utilize the tension of a spring to secure cables or conductors, 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. The simple push-in action minimizes installation errors.
2. Exceptional Vibration Resistance
   The constant spring force maintains stable electrical connections even in high-vibration environments (up to 10g acceleration), 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 to ensure long-term reliability.
4. Visual Inspection Window
   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
   Gold-plated spring mechanism prevents oxidation, enhancing long-term reliability in various environmental conditions.

Comprehensive System Solution

The ST3-10 terminal block integrates seamlessly with a range of accessories to form a complete wiring system:

• Protective End Cover: Cover ST3-10G provides finger protection and meets IP20 requirements
• Interconnection: Fork type Jumper FBS 10-10 enables efficient bridging between adjacent terminals
• Identification: Marker ZB10 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

Application Fields

• Power distribution systems and switchgear
• Industrial control panels and motor control centers (MCCs)
• Renewable energy installations (solar inverters, wind power)
• Railway and transportation systems
• Building automation and control systems
• Heavy machinery and equipment

Quality Assurance

Manufactured by ZHEJIANG SIPUN ELECTRIC CO., LTD. under ISO 9001 quality system with:

• 100% electrical testing
• Mechanical endurance: >1000 wire insertion/extraction cycles
• Environmental resistance testing per IEC 60068-2
• Salt spray testing per ISO 9227 for corrosion resistance
• Thermal cycling testing to ensure performance stability

The ST3-10 Spring Terminal Block represents a cost-effective and highly reliable connection technology solution for robust electrical systems requiring high current capacity and operational reliability.