ZHEJIANG SIPUN ELECTRIC CO., LTD. – ST3-2.5/2X2 Quattro Spring Terminal Block

Product Overview

ZHEJIANG SIPUN ELECTRIC CO., LTD. presents the ST3-2.5/2X2 Quattro, a compact and versatile double-level spring clamp terminal block. This terminal block is engineered with a unique two-in-two-out (Quattro) configuration, featuring four independent connection points arranged across two levels. It is designed for efficient and reliable electrical connections in industrial control systems, power distribution panels, and other applications where space optimization and wiring efficiency are critical.

Technical Specifications

The following table summarizes the key technical parameters for the ST3-2.5/2X2 Quattro terminal block:

Product Applications & Usage

The unique two-in-two-out (Quattro) design of the ST3-2.5/2X2 makes it an ideal solution for a variety of wiring scenarios:

• Compact Power and Signal Distribution: Its double-level structure allows for the distribution of a single circuit to multiple outputs or the combination of multiple inputs into one circuit within a very compact footprint. This is particularly beneficial in space-constrained control cabinets and compact junction boxes.
• Versatile Wiring Options: The terminal block can be used for:
  • Circuit Branching: Efficiently splitting one input into two separate outputs on different levels.
  • Potential Distribution: Facilitating the distribution of the same electrical potential to multiple devices.
  • Signal Duplication: Sending the same signal to two different destinations simultaneously.
• High-Density Installations: By accommodating four connections in the space of a single traditional terminal, it significantly increases wiring density on DIN rails, making it perfect for complex panels in industrial automation, power distribution systems, and building management.

Spring Clamp Technology Advantages

The ST3-2.5/2X2 utilizes reliable spring clamp technology, which offers significant benefits over traditional connection methods:

1. Tool-Free, Rapid Installation: Conductors can be connected quickly and securely with a simple push-in action, eliminating the need for torquing tools and drastically reducing wiring time.
2. Exceptional Vibration Resistance: The constant force exerted by the stainless steel spring ensures a stable, gas-tight connection that is highly resistant to loosening caused by vibration or thermal cycling, which is crucial in demanding environments like heavy machinery and transportation.
3. Long-Term Reliability and Maintenance-Free: The spring mechanism automatically maintains optimal contact pressure on the conductor over time, preventing cold flow and oxidation, which leads to a maintenance-free connection.
4. Easy Inspection and Maintenance: The transparent housing or design often allows for visual verification of proper wire insertion. A standard screwdriver can be used to open the clamp via the test opening for easy circuit testing or wire modifications.
5. High Safety and Durability: The housing is made from flame-retardant PA66 material (UL94 V-0), and the tin-plated copper contacts provide excellent conductivity and corrosion resistance, ensuring safe operation in various environmental conditions.

Comprehensive System Solution

This terminal block is part of a complete wiring system and is compatible with a range of accessories from ZHEJIANG SIPUN ELECTRIC CO., LTD.:

• Protective End Cover / Barrier: Cover ST3-2.5/2X2G provides finger safety and helps meet IP20 protection requirements.
• Bridging Components: Fork type Jumper FBS 10-5 allows for the creation of continuous potential groups across multiple terminal blocks.
• Identification: Marker ZB5 enables clear and permanent circuit identification for easy maintenance and troubleshooting.

Compliance and Quality Assurance

The ST3-2.5/2X2 Quattro Spring Terminal Block is manufactured in compliance with international and national standards, including:

• IEC 60947-7-1 & IEC 60947-7-2
• GB14048.7 & GB14048.8

Manufactured by ZHEJIANG SIPUN ELECTRIC CO., LTD. under a strict quality management system, the product undergoes rigorous testing to ensure consistent performance, electrical safety, and long-term durability.