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Multilevel - Multifunction Fuse & Knife Disconnect Terminal Blocks: A Comprehensive Guide
January 2024


In the world of electrical engineering, terminal blocks are indispensable components for creating organised and efficient electrical connections. When it comes to multi-functionality and safety in electrical distribution and control systems, the multifunction fuse and knife disconnect terminal block stands out as a powerful and versatile solution. In this technical blog, we will explore the features, applications, and advantages of multifunction fuse and knife disconnect terminal blocks.

What Are Multilevel - Multifunction Fuse & Knife Disconnect Terminal Blocks?

Multilevel - Multifunction fuse and knife disconnect terminal blocks are advanced terminal blocks designed to provide a combination of multiple functions within a single terminal block. These terminal blocks incorporate several essential features:

Fuse Holder: They include a fuse holder for protecting circuits against overcurrent or electrical surges, which is essential for safeguarding electrical equipment and preventing damage.

Knife Disconnect: A knife-disconnect switch is integrated into the terminal block, allowing for safe and easy circuit isolation when needed. This function provides an extra layer of safety during maintenance or troubleshooting.




Key Features of Multilevel - Multifunction Fuse & Knife Disconnect Terminal Blocks

Space-Saving Design: These terminal blocks combine multiple functions into one single terminal, saving valuable space in control cabinets and electrical panels. This feature is especially important in applications with limited available space.


Enhanced Safety: The integrated fuse holder and knife disconnect switch enhance safety by protecting against overcurrent and allowing for safe circuit isolation during maintenance.


Modularity: These terminal blocks are modular, allowing for customization based on specific application requirements. Users can choose the number of terminals, fuse ratings, and other features to meet their needs.


LED Indication: The fuse carrier also comes with an LED feature for fuse blown-out indication, allowing users to quickly identify when the fuse has blown off.

Marking Facility: In addition to maker provision on the terminal block, both the fuse carrier and knife disconnect are featured with individual marking facilities for clear identification of connected circuits.


Easy Installation: They are designed for easy installation, often featuring tool-free wiring methods that streamline the installation process and reduce labour costs.


Applications of Multilevel - Multifunction Fuse & Knife Disconnect Terminal Blocks

Multilevel multifunction fuse and knife disconnect terminal blocks are indispensable in various applications, particularly within the automation and continuous process industries, where Distributed Control System (DCS) applications are prevalent. In DCS setups, numerous connections are established with IO modules, typically involving both positive (+ve) and negative (-ve) 24V and 0V signals. Traditionally, two distinct terminal blocks are employed, with one serving as a fuse terminal block for (+ve) connections and the other as a non-fuse or disconnect terminal block for (-ve) connections. Designers often resort to shorting, connecting all the positive or negative terminals together, using wire loops. This practice leads to a proliferation of wires within the cabinet, resulting in clutter, increased cabinet size, added weight, and elevated panel costs.


Multilevel multifunction fuse and knife disconnect terminal blocks offer an elegant solution to these challenges by consolidating both functions into a single terminal block. These double-level terminal blocks feature an integrated fuse carrier on the top level and a disconnect function on the bottom level, operating independently of each other. (+ve) connections are established on the top level, while (-ve) connections are made to the bottom level. This ingenious design eliminates the need for two separate terminal blocks, thus optimizing cabinet space utilization.


Furthermore, each level (Top and bottom) facilitates shorting, allowing all top fuse connections or all bottom disconnect connections to be shorted together using pluggable shorting links. This innovation replaces wire looping for shorting and substantially reduces wire density within the panels by up to 65%. The result is a more efficient and cost-effective control panel solution for DCS applications.


Connectwell offers CPDLFK2.5 Multi-Level Multi-connection Fuse & Disconnect terminal blocks for applications depicted earlier.



Multifunction fuse and knife disconnect terminal blocks represent a significant advancement in electrical distribution and control systems. Their ability to combine fuse protection & knife disconnect into a single unit makes them a versatile and space-saving solution for all automation and continuous process range of applications. With enhanced safety features, ease of installation, and cost-effectiveness, these terminal blocks continue to be a valuable choice for engineers and designers looking to optimize their electrical systems while ensuring the highest levels of safety and reliability. As technology evolves, we can expect multifunction terminal blocks to play an increasingly critical role in modern electrical engineering.

Connectwell, your right connection partner

With more than 15 international product certifications backed by the most stringent quality standards, our products pass through more than 40 quality assurance tests. This has ensured a ready acceptance of Connectwell terminal blocks across 80+ countries and in thousands of projects and applications worldwide.

Through our 4 decades of experience with state-of-the-art operations which are ISO certified, Connectwell has grown to become one of the leading manufacturers of terminal blocks in the world.

More than 1 million connections are made every day across the globe with Connectwell terminal blocks, making Connectwell a synonym for… the right connection.

So, if you would like to build your projects with a solution that can accommodate both dense and simple wiring, while saving panel space, ensure that you select Connectwell Multiple Level Terminal Blocks and get the added flexibility you need.

To know more about how Connectwell can contribute to your applications, please reach out to us at or +912517120600 / +912516762600


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