Product Overview
ZHEJIANG SIPUN ELECTRIC CO., LTD. introduces the ST3-4/1X2 Twin Terminal Block, a high-performance spring-clamp terminal block engineered for efficient and safe electrical distribution in compact spaces. This terminal block features a unique one-in, two-out (1X2) configuration, allowing a single input circuit to branch into two separate output circuits. Critically, it incorporates a dedicated integrated equipotential bonding function, making it an ideal solution for applications where space optimization, reliable circuit branching, and enhanced electrical safety are paramount.
Technical Specifications
The table below summarizes the core technical parameters of the ST3-4/1X2:
Applications and Usage
The ST3-4/1X2 is designed for space-constrained control panels and enclosures where efficient wiring and safety are critical.
- Space-Efficient Circuit Branching: Perfect for splitting a single power or signal source to supply two separate loads, sensors, or devices, effectively doubling connection points within a compact footprint.
- Control Cabinet Wiring: Ideal for use in PLC systems, motor control centers (MCCs), and industrial automation panels where dense, organized wiring is required.
- Safety-Critical Installations: Its integrated bonding feature makes it particularly suitable for applications requiring reliable potential equalization to protect personnel and equipment, such as in machinery, power distribution, and building management systems.
Key Features and Advantages
1. Integrated Equipotential Bonding for Enhanced Safety
This is the defining feature of the ST3-4/1X2 PV variant. Equipotential bonding connects conductive parts to minimize voltage differences between them. This terminal block facilitates this by providing a dedicated, reliable path for bonding conductors across its connection points.
- Personnel Protection: Significantly reduces the risk of electric shock by preventing dangerous touch voltages that can occur during an insulation fault, ensuring a safer environment.
- Equipment Protection: Minimizes damaging potential differences and circulating currents between connected devices, protecting sensitive electronic components.
- Simplified Compliance: The built-in function aids in meeting electrical installation standards (like IEC 60364) that mandate equipotential bonding, reducing the need for external wiring.
2. Spring-Clamp Connection Technology
- Tool-Free, Rapid Installation: Wires are securely connected with a simple push-in action using a standard screwdriver, drastically reducing wiring time compared to screw terminals.
- High Vibration Resistance: The constant force of the stainless-steel spring ensures a maintenance-free, gas-tight connection that resists loosening in demanding environments.
- Long-Term Reliability: The spring mechanism automatically maintains optimal contact pressure, preventing oxidation and cold flow for consistent performance over time.
3. Compact and Efficient Twin Design
- Space Savings: The vertical twin-level design provides two independent connection levels, allowing for higher wiring density on the DIN rail compared to using two single-level blocks.
- Clear Circuit Organization: Keeps related input and output circuits neatly organized within a single block, simplifying identification and maintenance.
Complete System Solution
The ST3-4/1X2 is part of a comprehensive wiring system and is compatible with a full range of accessories from ZHEJIANG SIPUN ELECTRIC CO., LTD.:
- End Cover / Barrier: Cover ST3-4/1X2G provides finger protection and helps meet IP20 requirements.
- Bridging Components: Fork type Jumper FBS 10-6 enables the creation of continuous potential groups across multiple terminal blocks.
- Identification: Marker ZB6 allows for clear, permanent circuit marking.
Quality Assurance
Manufactured by ZHEJIANG SIPUN ELECTRIC CO., LTD. under a strict quality management system, the ST3-4/1X2 terminal block undergoes rigorous testing to ensure it meets all specified international and national standards, guaranteeing reliable performance, electrical safety, and long-term durability in industrial applications.
Post time: Dec-08-2025