Connectors – find manufacturers and suppliers

Connectors, also known as plug connections, are mechanical and electrical devices that are used to make and break electrical or optical connections between two or more components.

They can be found in almost all electronic devices and systems and enable a flexible, reliable and repeatable connection.

Below you will find the functionality, types and use of connectors, as well as an overview of connection reliability mechanisms and their advantages:

How connectors work:

Mechanical connection:

A typical connector consists of a male part (plug) and a female part (socket) that fit together mechanically and ensure a stable contact. Many connectors have mechanical guides to ensure that the contacts are correctly aligned and a secure connection is made. Electrical contacts inside the connector transmit the current or signal between the connected wires.

Electrical connection:

Connectors transmit signals, power or data between different components. Depending on the type and design, they can transmit analog or digital signals, direct current (DC) or alternating current (AC).
Commonly used contact materials are copper, gold-plated or silver-plated contacts to minimize electrical resistance and ensure reliable signal transmission.

Types of connectors:

1. Circular connectors:
   Cylindrical design, robust and suitable for industrial applications.
2. Flat connectors:
   Flat contacts for space-saving applications.
3. USB connectors:
   Standard for data and power transmission in computers and mobile devices.
4. RJ45 connectors:
   Typically used for network cables (Ethernet).
5. D-Sub connector:
   Used in older computer interfaces (e.g. VGA).
6. Coaxial connector:
   Used to transmit high frequency signals (e.g. television cable).
7. High-current connectors:
   Specifically for the transmission of high currents in industrial applications.
8. Audio connectors:
   A variety of solutions have been developed for the transmission of audio signals. For example: RCA or XLR connectors.

Use of connectors:

Connectors are used in almost all areas of electronics and electrical engineering. Typical areas of application are:

1. Electronic devices:
Connecting components in computers, smartphones, audio and video equipment, household appliances.

2. Automotive industry:
Connecting sensors, control units and other electrical components in vehicles.

3. Industrial automation:
Connecting machines, robots and control systems in the manufacturing industry.

4. Telecommunications:
Data and signal transmission in networks, mobile radio systems and communication infrastructures.

5. Medical technology:
Secure connections in devices such as ECG monitors, MRI scanners and other medical devices.

6. Energy and power engineering:
Connecting high-voltage systems, solar cells and other energy sources.

Connection reliability of connectors:

To ensure a secure and stable connection, many connectors use locking systems (e.g. snap locks, screw connections or bayonet locks) that prevent accidental disconnection.
Some connectors have protection mechanisms against environmental influences such as water, dust or vibrations (IP ratings).

Advantages of connectors:

• Connectors enable quick and easy assembly and disassembly of electrical systems.
• They allow flexible connection of components that can be easily exchanged or replaced.
• Thanks to high-quality contacts and locking systems, connectors offer reliable electrical connections.
• Many connectors offer protection against dust, moisture and mechanical stress, making them durable and safe in harsh environments.

Connectors are essential components in electrical and electronic systems, providing flexible and reliable connectivity. They are available in a variety of shapes and designs to meet different requirements in terms of power, signal transmission and environmental conditions.

Below you will find an overview of the most important criteria to look out for when purchasing connectors:

When purchasing connectors, there are several important factors that should be considered to ensure that the chosen connector is suitable for the application.

• The connector must be able to carry the maximum operating current without overheating or causing power loss.
• Ensure that the connector is rated for the required operating voltage (DC or AC).
• Low contact resistance is important to minimize power loss and heat generation.
• Depending on the application, you should ensure that the connector is designed for a high number of mating and unmating operations.
• If the connector is exposed to mechanical loads, vibrations or shocks, it must be built accordingly robust.
• Select a locking system (e.g. screw, snap or bayonet lock) that prevents the connector from accidentally coming loose.
• If the connector is used in a harsh environment (dust, moisture, water), you should ensure a high protection class (e.g. IP67 or IP68).
• The connector must be able to withstand the temperatures prevailing in the area of use.
• In corrosive environments (e.g. marine applications), the connector should be corrosion-resistant, e.g. using materials such as stainless steel or special coatings.
• Gold, silver or nickel-plated contacts offer better conductivity and are more corrosion-resistant than standard materials.
• Make sure you use a good insulation material that can withstand the environmental conditions (e.g. heat or chemical resistant).
• For data connections, the connector should be designed for the required transmission speed (e.g. USB, Ethernet).
• For applications with high electromagnetic interference (EMI), you should use shielded connectors to avoid signal interference.
• The available space in the system often determines the size of the connector. Choose a connector that is compact enough to fit into your application without compromising mechanical integrity.
• Consider whether the connector is intended for PCB mounting, cable mounting or panel mounting.
• If you need a combination of power, signal and data connections, modular connectors are a flexible solution.
• Select the number of contacts (poles) according to the requirements of your application.
• The connector should comply with the relevant safety and quality standards (e.g. UL, CE, RoHS, IEC). Such certifications are essential in safety-critical applications, such as in medical or aviation technology.
• In areas with high safety requirements, the connector materials should be flame-retardant.
• Some connectors allow for tool-free installation, which can shorten assembly time and reduce maintenance costs.
• Choose connectors with suitable strain relief systems to protect the cable and increase longevity.
• The price of the connector should be proportionate to the required performance and durability.
• Make sure that the connector is easily replaceable and that spare parts are available.

When purchasing a connector, the electrical, mechanical and environmental requirements are the most important criteria. Depending on the application, you must pay attention to the current carrying capacity, protection class, material and certifications to ensure a safe and durable connection. The right choice of connector makes a decisive contribution to the reliability and efficiency of your systems.

Connectors can be purchased from various suppliers. Comprehensive information about manufacturers and suppliers of Connectors from all over the world can be found on Exportpages.