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For reliable connectors – even after many cycles

The benefits of our connectors are clear: they create detachable connections between a cable and a device, for example, and withstand hundreds of plug cycles. EPIC® industrial connectors are used for power supply as well as signal and data transmission in various industrial environments and support the cable in its tasks: they supply another piece of equipment with power, control the signal transmission and guarantee data exchange. We offer a variety of connector variants for a wide range of applications and with different ordering options. Receive individual parts, kits or customized assemblies.

What are the connectors used for?

In the past, electrical connections were hard-wired, soldered, and then often not touched for a long time; today, these connections are made using connectors that can be disconnected and reconnected again thousands of times, always creating a reliable contact. A connector is therefore the key component of a detachable, secure connection between two cables or for connecting a cable to a device or machine.

Which connectors are available at LAPP?

Overview of possible connections with connectors

Not all connectors are made equal. The shape defines the function. Below you will find an overview of our connector range; from there, you can navigate more easily to the product of your choice.

Find out on the respective sub-pages how industrial connectors are structured, which connection technologies are suitable for assembly, which areas of application result from the respective product group and much more.

Rectangular connectors

Suitable for industrial applications in mechanical and plant engineering, control cabinet construction, lighting and sound technology, etc. as they are robust in harsh environments and easy to use. They are largely used to supply power and transmit signals. However, the modular rectangular connector systems EPIC® MC modules and EPIC® MH enable flexible mixed assembly and are therefore also used for data transmission.

Housings and inserts: There are robust, versatile and highly corrosion-protected housing series available. With the inserts, you can choose between fixed pole or modular to create a customized insert.

Circular connectors

These are particularly suitable for applications in measurement, control and regulation technology, servo drive technology, conveyor technology or industrial robots.

In this product group, you will find power connectors and signal connectors in the sizes M12 to M58, as well as single-pole EPIC® POWERLOCK connectors for use with mobile and stationary energy or emergency power generators or battery storage systems.

Solar connectors

Suitable for direct current applications within photovoltaic systems, i.e. for cabling solar modules, inverters and stand-alone systems. The connectors can be freely assembled.

Data connectors

Suitable for data transmission with copper-based electrical data cables (fieldbus, sensor-actuator, Ethernet) as well as optically transmitting fiber optic cables. In this product group, you will find the most common connectors for harsh industrial environments, structured building cabling, and use in data centers or control cabinets.

An industrial connector is the final touch added at the end of a cable that supplies a piece of equipment with energy, controls it, reads signals or transmits data from a transmitter to a receiver.
Connectors can be found in all industrial environments: in mechanical and plant engineering, in control cabinets and of course in outdoor applications. The different shapes, sizes and variants enable a wide range of applications.

Whether you want to connect the field level to the control cabinet or control unit or for machine-to-machine communication, you are sure to find the right product at LAPP, including all the necessary support information.

The trend towards miniaturization and performance compression is not only evident in the cable area, but is also reflected in the connector area. Ideally, new connectors should have multiple benefits, take up less space in the application, be PROFINET-compliant, vibration-resistant, and have comprehensive shielding for maximum electromagnetic compatibility.

At LAPP, we do everything we can to help you tackle new challenges and to develop the perfect connector for your respective operation site.

Smallest power connector available on the market- EPIC® POWER M12L

Two that fit together like a pot and lid: cables and connectors

Cables and connectors are simply in perfect symbiosis. This is what Oskar Lapp (1921-1987) thought when he founded the LAPP family company in 1959 and brought the first industrially produced ÖLFLEX® power and control cables with colored conductors to the market. Shortly afterwards, the first rectangular connectors from the EPIC® product brand were added to round off the portfolio.

EPIC has always stood for "Environmentally Protected Industrial Connectors".

EPIC® industrial connectors – We connect innovations

Our EPIC® products also meet your individual requirements:

For voltages up to 1.5 kV

For currents up to 660 A

With 1 to 280 contacts

From loose to assembled – you have the choice!

Kits and sets for minimized ordering effort

Don't feel comfortable researching and then purchasing all the individual components required for manufacturing a connector? Do you want to reduce your ordering effort and eliminate the risk of incorrect orders?

Understandable – you're not alone in this! Many customers prefer assembled connector sets with optimally coordinated components.

That is why you will find our kits for rectangular, circular and solar connectors in each connector product group, consisting of a housing, insert, contacts and cable gland, for example.

The worry-free ÖLFLEX® CONNECT package

If you like convenience, try our effective connection technology and let us produce plug & play solutions for you. Suitable for immediate use and perfectly assembled. Either with products from the standard range or customized. Get to your desired cable including an overmolded connector in just a few steps!

Request your desired product now via ÖLFLEX® CONNECT

Connector term definitions

In recent years, we have found a lack of consistency in technical language relating to connectors. Terminology that should be easily understood is sometimes explained incorrectly and can lead to misunderstanding in written communication. We're hoping to clear up any confusion!

When used correctly, the term plug actually only describes the male insert, but not the whole connector. A connector consists of a male part, known as the plug, and a female part, known as the socket.

In the interior of the connector, a distinction is made between the pin and the socket.

What should you consider when it comes to connectors?

When used as intended, connectors are pieces of equipment that must NOT be plugged in or unplugged when under electrical voltage (or technically under load). When connecting or disconnecting a connector under load, sparks and (briefly) high temperatures result which could destroy the contact surface and lead to the total failure of the connector.

Connectors should only be connected or disconnected when there is no current and voltage.

The pollution level is a numerical value and indicates the environment for which the connector has been developed and tested. Pollution level 3 is typical for industrial environments, while pollution level 2 is typical for households.

Pollution levels and their significance
Pollution level 1

  • There is no pollution or only dry, non-conductive pollution. The pollution has no influence on the properties of the connector.
  • Open, unprotected insulation in air-conditioned or clean, dry rooms.

Pollution level 2

  • Only non-conductive pollution occurs. Occasionally, however, temporary conductivity due to condensation must be expected.
  • Open, unprotected insulation in residential, retail and other commercial premises, fine mechanical workshops, laboratories, test areas, medical premises.

Pollution level 3

  • There is conductive pollution or dry, non-conductive pollution that becomes conductive because condensation is to be expected.
  • Open, unprotected insulation in rooms of industrial, commercial and agricultural plants, non-heated warehouses, workshops, boiler houses.

Pollution level 4

  • Contamination results in constant conductivity caused by conductive dust, rain or snow.
  • Open, unprotected insulation in maritime or mining applications

EPIC® connectors are generally designed for pollution level 3 and therefore have high safety reserves, even if the connector is wet or dirty inside. The high reliability of EPIC® results from use of high quality materials and manufacturing expertise.

The rated voltage is the voltage according to which connectors are rated. It indicates at which voltage a connector can be operated continuously and without impairing its performance.


  • The rated voltage depends on the defined pollution level. If a connector was tested for pollution level 1, the rated voltage given in the technical data is significantly higher than if it was tested for pollution level 2.
  • The rated voltage depends on the insulating properties of the materials used and the creepage distance (the distance between contacts on a surface).
  • The rated voltage depends on the clearance (the distance between contacts through air).
  • The rated voltage depends on the pole configuration, i.e. the number of contacts. The more contacts are installed in a connector, the lower the rated voltage.
The rated impulse voltage is the maximum voltage that a connector can withstand briefly under defined conditions without breakdown or flashover. At this specified voltage, there are no breakdowns or flashovers in the connector.

The rated current is the maximum current determined by the manufacturer that can flow continuously through all contacts of the connector without the upper temperature limit being exceeded. The rated current is specified at an ambient temperature of 40 C. It is determined for the largest conductor cross-section that can be connected to the connector.

The rated current depends on the size of the contacts in the connector. As the contact diameter increases, so does the current.

Contact layers made of high-grade materials are essential to ensure a secure electrical connection over the long term. The contacts are usually coated using galvanic processes. In order to achieve a durable coating, the following requirements are placed on the base material and its contact layers: LAPP primarily uses silver (Ag) and gold (Au) for surface coating.

Silver has the highest electrical conductivity of all metals. The passivation of the silver surface delays the formation of an oxide layer and reduces the insertion and pulling forces. A brownish to black oxide layer of silver sulphide (Ag2S) forms due to sulfur or substances containing sulfur in the ambient air. However, this layer can be broken during the connecting process or is broken at high currents, so the required electrical conductivity is maintained.

Gold is the most resistant precious metal. The formation of oxides and sulfides can be ignored. Gold contacts are characterized by low insertion and pulling forces. They are mainly used for the transmission of signals with low current and voltage values.

EPIC® products only use high-quality stainless metal alloys for coating the contacts.

When selecting a connector insert, the insert that can accommodate at least the number of contacts required for the plug connection must be selected. Connector inserts containing more contacts can also be selected in the application. This means that the same connection system can often continue to be used when the application is expanded.

Each time a connector is connected or disconnected, this represents one mating cycle. If a connector is subjected to too many plug cycles, this will have negative effects on the contact resistance and also on the coating of the contact area. When determining the maximum number of plug cycles, a test is carried out to find out how many connecting and disconnecting actions cause the contact resistance to increase to an unacceptable level. It must not increase by more than 50% or exceed a maximum of 5 mOhm.

Due to the high-precision manufacture of the contacts and the choice of contact materials, the EPIC® connector has a very long service life.

Electromagnetic compatibility, or EMC for short, is the ability of electrical equipment to function satisfactorily in its electromagnetic environment without impermissibly influencing the environment, which also includes other equipment, or being influenced by it (DIN/VDE 0870, Part 1).

In industrial environments, the interference frequencies normally lie in the frequency range below 100 kHz. In this frequency range, the most important factor is low-impedance, large-scale, 360° shielding.

Connectors that are protected from electromagnetic interference have housings with a metallic, conductive surface, a good electrical connection to the mating component and are equipped with a cable gland that allows the cable shield to be electrically connected to the housing.

EMC connectors are mainly used in the area of circular connectors. For rectangular connectors, the EPIC® ULTRA housings have been specially developed to meet these requirements.

Find out more about EMC

Coding is an arrangement which prevents connectors which are identical other than their different polarization from being mixed up, i.e. incorrect connecting and cabling. This is suitable if two or more identical connectors are attached to the same device.

Coding can be performed with a coding key or coding insert, or using coding pins that can be screwed into the housing. With EPIC®, there is a coding option optimized for every connector system, such as coding-capable inserts and housing, as well as pre-coded circular connectors.

The temperature range is determined by the upper and lower limit temperature. The limit temperatures are the maximum and minimum permissible temperatures at which a connector may be operated.

Everything from a single source

We have been offering cables, wires and connectors from a single source since 1963. Benefit from our in-depth expertise for your application!

Made in Germany

The connector range is developed, produced and tested primarily at the German headquarters in Stuttgart. After all, "Made in Germany" is known for high quality products!

Connectors in all variants

Experience millions of combination possibilities for one connector. It's almost impossible not to find the right one!