SIPUN ST3-6 Spring Clamp Terminal Block

ZHEJIANG SIPUN ELECTRIC CO., LTD. presents the ST3-6 high-capacity feed-through terminal block, engineered with advanced spring clamp technology for superior electrical connectivity. Designed for industrial applications requiring robust performance, this terminal block ensures reliable power distribution in control systems, power cabinets, and heavy-duty equipment.

Technical Specifications

• Conductor Cross-Section: 0.2 mm² to 10.0 mm²
• Rated Voltage: 800V AC/DC
• Rated Current: 41A
• Operating Temperature: -40°C to +120°C
• Contact Material: High-conductivity copper alloy, tin-plated
• Housing Material: PA66 (UL94 V-0 rated)

Spring Clamp Technology Advantages

1. Tool-Free Operation
   Direct conductor insertion enables rapid installation without special tools, reducing wiring time by up to 50% compared to screw terminals
2. Vibration Resistance
   Maintains stable connection under severe vibration conditions (up to 10g acceleration)
3. Self-Adjusting Contact Pressure
   Constant spring force ensures optimal contact pressure throughout thermal cycling
4. Visual Inspection Window
   Transparent housing design allows quick verification of proper wire insertion
5. Maintenance-Friendly
   Integrated test opening facilitates easy circuit testing and wire modifications
6. Corrosion Resistance
   Gold-plated spring mechanism prevents oxidation for long-term reliability

System Components

• Protective Cover: Cover ST3-6G (IP20 protection)
• Interconnection: Fork type Jumper FBS 10-8
• Identification: Marker ZB8 for circuit marking
• Mounting: Compatible with standard DIN rails (35mm)

Compliance Standards

• IEC 60947-7-1 & IEC 60947-7-2
• GB14048.7 & GB14048.8
• CE certified
• RoHS compliant

Application Fields

• Power distribution systems
• Industrial control panels
• Motor control centers
• Renewable energy installations
• Railway and transportation systems
• Building automation

Quality Assurance

Manufactured under ISO 9001 quality system with:

• 100% electrical testing
• Salt spray testing per ISO 9227
• Mechanical endurance: >1000 wire insertion/extraction cycles
• Environmental resistance testing per IEC 60068-2