7 Screwless Terminal Block Manufacturers in 2023
This section provides an overview for screwless terminal blocks as well as their applications and principles. Also, please take a look at the list of 7 screwless terminal block manufacturers and their company rankings.
Table of Contents
What Is a Screwless Terminal Block?
Screwless terminal blocks are terminal blocks that do not require screw fastening.
Some are designed for one-touch operation and use dedicated crimp terminals, while others do not require crimp terminals, allowing both single wires and stranded wires to be peeled off their sheaths and directly wired or un-wired to the terminal block.
This eliminates the need for screws to be removed or forgotten when mounting or dismounting.
Uses of Screwless Terminal Blocks
Screwless terminal blocks are relay components that connect electric wires in electric circuits.
They are used in places where electric wires are relayed to control equipment, etc., and where they are combined in a single location or branched.
In the case of screw-type wiring, the tightening torque varies from operator to operator, and in the case of soldering, skilled work is required. This reduces the workload and the burden on the operator.
Screwless terminal blocks are mainly used in control panels of industrial equipment.
Principle of Screwless Terminal Blocks
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, even over long periods of use.
The clamping force of screwless terminal blocks is based on spring force, a feature that eliminates the need for periodic retightening as is the case with screw-type terminal blocks.
Since the wire is secured by spring force set inside the terminal block, the larger the wire diameter, the stronger the clamping force.
Therefore, even when cables of different diameters are used on the same terminal block, the wire is not easily loosened and can be secured without damaging the wire.
To secure a wire that has been stripped of its sheath, use a flat-blade screwdriver or a special knob to reduce the force of the spring-loaded clamping force 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 opening.
List of 7 Screwless Terminal Block Manufacturers
*Including some distributors, etc.
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- Company Size: largest first
- Year Founded: oldest first
- Year Founded: earliest first
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- United States of America
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AutomationDirect
Screwless Terminal Blocks
Company Overview
AutomationDirect.com was founded in 1994 to provide solutions for the industrial automation market and has been growing its list of offerings ever since. AutomationDirects’ extensive catalog includes individual components such as cables, various controls, I/O devices, relays, gauges, fittings, and sensors to complete systems. Many parts and devices, especially PLC units are customizable. AutomationDirect.com also provides support via video instructions, online manuals, a learning library, an active community forum to further assist customers.
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Company Overview
WAGO was founded in Minden in 1951 in then West Germany. WAGO manufacturers components for the automotive, digital lant, elevator and escalator, energy, intralogistics, lighting, marine & offshore, mechanical engineering, and railway systems industries. WAGO produces, electrical interconnections such as rail mount terminal blocks, wire connectors, PCB interconnects, pluggable connection systems, panel feedthrough connections, and EMC shielding. Other types of products include relays, protection devices, fieldbus couplers, ethernet switches, touch panels, edge devices, and wireless devices.
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Wieland Electric Inc.
Screwless Terminal Blocks
Company Overview
Wieland Electric is headquartered in Hamberg Germany and was founded in 1910. Weiland Electric is a manufacturer of electrical connection and industrial automation products used in conveying, logistics, horticulture, lighting, machine building & safety, and energy industries. Wieland Electric’s product categories include active industrial products, passive industrial products, modular wiring systems, power distribution for electric vehicles, integrated lighting & building solutions, and indoor interconnect products such as metal fabrication, 3D printing for prototyping, electrical design, and box build fabrication.
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Screwless Terminal Block Manufacturer Ranking
*Including some distributors, etc.Number of Employees
- WAGO: 4,000
Newly Established Company
- NINGBO KLS ELECTRONIC CO.,LTD.: 2002 (21 years ago)
- CUI Devices: 1989 (34 years ago)
- Dinkle: 1983 (40 years ago)
Company with a History
- WAGO: 1950 (73 years ago)
- Dinkle: 1983 (40 years ago)
- CUI Devices: 1989 (34 years ago)
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