What Is a Screwless Terminal Block?
Screwless terminal blocks are a method of securing wiring without the use of screws.
This design significantly reduces the time and effort required for wiring work and at the same time improves the quality of signal transmission. It also greatly improves long-term reliability because it reduces the risk of contact failures due to loose screws.
Especially for hardware engineers and purchasing managers, it is worth seriously considering the use of screwless terminal blocks as an option for new projects and upgrades, as they can be expected to increase production efficiency, enhance maintainability, and even reduce overall costs.
In light of the above, screwless terminal blocks are gaining attention in many industries as a connection solution for modern electronic technology due to their superior characteristics and advantages.
Uses of Screwless Terminal Blocks
Screwless terminal blocks are increasingly being used in a variety of industries and applications as a screwless signal and power connection technology. Here we examine their main applications in detail.
1. Distribution Boards and Switchboards
Distribution boards and switchboards are central devices for power distribution and control. Screwless terminal blocks are extremely useful in these installations because they require solid connections and long-term reliability. They improve safety and maintainability by reducing the risk of loose screws and poor contact.
2. Semiconductor Manufacturing Equipment
In semiconductor manufacturing processes, which require precision and advanced technology, reliable electrical connections are essential. Screwless terminal blocks are ideal for quick and reliable wiring while maintaining signal accuracy and quality.
3. Machine Tools
Machine tools often operate in harsh environments with vibration and heat, requiring highly reliable connection technology. Screwless terminal blocks can maintain stable connections even under such conditions.
4. Storage Batteries
Screwless terminal blocks are increasingly being used to connect storage batteries. This technology is suitable for applications involving high currents and rapid charging and discharging, which require secure connections and high durability.
5. Photovoltaic/Solar Power Generation Equipment
Photovoltaic and solar power generation equipment is sensitive to environmental influences and requires long-term reliability and ease of maintenance. Screwless terminal blocks are the ideal choice to meet these requirements.
Principle of Screwless Terminal Blocks
1. Screwless Terminal Block Spring
The springs set into screwless terminal blocks are often made of stainless steel, and the conductive parts are electrolytic copper or tin plated, making them as durable as or more durable than screw-type terminal blocks over long periods of use. The clamping force of screwless terminal blocks is based on spring force, so they do not require periodic retightening as screw-type terminal blocks do.
The spring force set inside the terminal block secures the wire, and the larger the diameter of the wire, the stronger the clamping force. Therefore, even when using cables of different diameters on the same terminal block, the wire is not easily loosened and can be secured without damaging the wire.
2. Screwless Terminal Block Fixing Method
To secure a wire that has been stripped of its sheath, use a flat-blade screwdriver or a dedicated knob to reduce the force exerted by the spring to hold the wire in place, and insert the wire all the way to the back of the connection port. When removing an electric wire, use a flat-blade screwdriver or a dedicated knob to weaken the spring-loaded restraining force and pull the wire out of the connection port.
Types of Screwless Terminal Blocks
Screwless terminal blocks are widely used in many industries for their convenience and reliability. Various types of screwless terminal blocks are designed and manufactured to suit different uses and applications.
1. For Panel Mounting
Screwless terminal blocks for panel mounting are designed for direct mounting on the external panel of equipment and facilities. This allows for easy access and maintenance.
Primary applications include large equipment, facilities, and electrical wiring termination connection points.
2. For Board Mounting
Screwless terminal blocks for board mounting are designed for direct mounting on electronic boards. This allows them to be used in applications requiring compact design and high integration.
Primary applications include wiring terminations in electronic devices and PCBs, connections between modules, and signal transfer points.
3. For Relaying
Screwless terminal blocks for relaying are used to easily connect and relay two or more electrical circuits. They are characterized by multifunctionality and modular design. In many cases, they are compatible with existing wiring systems.
Primary applications include connecting and branching between cables and extending or modifying electrical circuits.