KCS - ERKO sp. z o.o. sp. k. | ELECTRO, AERO, ROBOTICS

Discover ERKO tubular terminals

Tubular terminals are dedicated for terminating copper conductors. They are commonly used to connect cables to busbars, switchboards, and contacts of apparatus, increasing safety and durability of a connection, among others, by reducing the phenomenon of overheating of conductors and their insulation.

Wondering how to choose the right terminal?

Selecting the right terminals and their correct pressing on a cable ensures failure-free operation of the installation. The choice of the right terminal depends on its intended use, current load, design, and functionality. We encourage you to learn more about ERKO terminals as you will find terminals tailored to your needs and requirements.

Cu tubular terminals

The ERKO product range includes several types of copper tubular terminals.

Copper tubular terminals can be divided into several different types by:
• their manufacturing standard: according to DIN standards (e.g., KCR, KC, KCL) or outside DIN standards (e.g., KCS)
• their shape: flat KCS terminal or angular with 45˚ or 90˚ angle (e.g., KC).
• the number of screw mounting holes made on the contact part of the copper tubular terminal: single or double mounting hole (e.g., KCL terminal); or made according to individual arrangements.
• being dedicated for special purposes: made of other materials or with other galvanic coatings than specified in the existing standards.
• their working voltage: low or medium.
• their manufacturing, e.g., with a tight barrier, as in the case of terminals KCM type.

What makes the ERKO products so distinguishable?

As one of the few manufacturers, for manufacturing of terminals we use galvanically tinned copper of defined parameters (e.g., compliant with DIN standard). Owing to appropriately defined parameters, we ensure long service life and reliability. The tin coating is galvanically applied through an electrochemical process. The galvanic bath has particular efficiency and throwing power, which means a smaller degree of penetration of the inner surface a tube. We have optimized the process of applying the tin coating, where the throwing power ensures minimum 3 μm thick coating inside the tubular part. According to standards, the thickness of coating on cable terminals is defined to be at least 3 microns on the outer surface. We do our best to keep it within the range of 8-10 microns, which is enough to improve the electrical contact and protect the connection of terminal and busbar contact surface from oxidation, etc. The terminals we manufacture also have a higher dimensional tolerance than required by the DIN standard. This feature is very desirable in the automation of the crimping process, as it eliminates jamming of the terminal during feeding and cable application processes.


Depending on needs of industrial customers, we can adjust the terminal to individual needs of a customer, e.g.:

  • Custom-made thickness of tin-plating (or no plating).
  • Several types of coating, e.g., nickel, which increases the temperature resistance for continuous operation to 300˚C (and short-term to 350˚C).
  • Several types of coating such as silver or gold plating.
  • Belling of tubular part to facilitate the application of class 5 and 6 conductors and braided conductors.
  • Belling of tubular part to protect the cable core in the event of vibration-prone connections or movement of the power cable core.
  • Inspection hole of the tubular part of a terminal.

  • Different dimensions either of the tubular part or of the entire terminal.
  • Different preparation of the screw hole (oval, bean-shaped, with undercuts, etc.).
  • Custom-made shaping of the contact surface of a terminal.
  • Different marking of a terminal or no marking at all.
  • Nut pressed into the hole.
  • Larger collective packages.
  • We can conduct design engineer tests of custom-made terminals based on PN-EN 61238-1: 2004 standard (heating, mechanical tests)
  • Different screw hole diameter dimensions.


The most popular terminal manufactured by ERKO

The bestseller of our company is the KCS tubular terminal, dedicated for connecting and terminating multi-wire copper cables in the range of from 2.5 mm2 to 400 mm2. It is made of galvanically tinned copper, but on request it can also be manufactured as non-tinned. Chemical composition and delivery of material used for manufacturing of KSC terminals is compliant with DIN 46235 standard (provided for DIN terminals). This guarantees the resistance of terminals to be within the same range as for the terminals made according to DIN standards. The defined delivery conditions of the material from which the terminal is manufactured guarantee that the terminal is properly pressed (no cracks or internal material defects at the area of pressing). This guarantees that the correct resistance of terminal and wire connection is achieved (there is no overheating of the pressing point). The breaking strength of the received connection meets the requirements of the standard in accordance with PN-EN 61238 for the appropriate cross-section of the terminal, determined according to formula: 60 N/mm2. Making sure that the material used for manufacturing of terminals is of the right delivery conditions guarantees that in the process of manufacturing of terminals there are no internal cracks nor delamination of the material, which may result in an increase in the resistance of the connection made and decrease in the required breaking strength.

ERKO sp. z o.o. sp. k.

Lipowa 24 Street
11-042 Jonkowo (near Olsztyn)
Warmian-Masurian voivodeship
phone/fax +48 89 512 92 73

General inquiries: erko@erko.pl
Sales: sprzedaz@erko.pl
Marketing: marketing@erko.pl

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