Branch terminals – find manufacturers and suppliers

Branch terminals are electrical connection elements that are used to split an existing line or connect additional lines - without interrupting or damaging the main line.

They are used in particular in distribution boards, control cabinets or installation boxes.

Below you will find the functionality, types, use and areas of application of branch terminals as well as their advantages:

How branch terminals work:

The basic mode of operation is to establish a safe electrical connection between a main conductor (e.g. supply line) and one or more outgoing conductors.

A central element of every terminal is the insulation. It ensures that no current penetrates to the outside unintentionally and protects against contact voltages. The housings are usually made of robust, flame-retardant plastic.

Types of branch terminals:

1. Spring-loaded terminal: Makes contact by applying spring pressure to the conductor. Enables time-saving and tool-free installation.
2. Screw terminal: The conductor is clamped in place with a screw to make contact. Robust, proven technology .
3. IDC terminal: The insulation is cut without stripping. Especially for fast series connections.
4. Push-in terminal: Direct insertion of stripped conductors. Particularly popular with terminal blocks.
5. Multiple branch terminals: Multiple outlets e.g. 1 input, 4 outputs. Suitable for power distribution and star wiring.

Use and application areas of branch terminals:

Branch terminals are versatile components used in many areas of electrical engineering to make connections between conductors - especially where multiple circuits need to be fed or extended from a central point.

1. General electrical installation:
Branching of socket and lighting circuits from a common supply line.
Connection of several consumers to a single supply line.
Star-shaped wiring in distribution boxes.

2. Switch cabinets and distribution systems in mechanical and plant engineering:
Distribution of mains voltages to different load outlets.
Distribution of control current (e.g. 24 V DC) to several consumers, such as sensors, relays or small motors.
Disconnection, testing and extension of circuits with special disconnect or test terminals.

3. Power supply systems:
Distribution of energy from a central power supply unit.
Branch terminals enable targeted feeding into fused circuits. In combination with fuse holders or fuse terminals, they can also selectively protect circuits.
In safety-critical systems (e.g. emergency power systems or industrial processes), branch terminals can be used to connect mains and UPS supplies in parallel.

4. Photovoltaic and power distribution systems:
Branch terminals are used when joining or branching strings in solar systems.
They are also used in energy storage and charging infrastructure - often with higher current loads and a specific protection class.

5. Vehicles and mobile systems:
In commercial vehicles, motorhomes or rail applications, compact branch terminals enable the safe distribution of on-board voltages.
Often with a vibration-proof clamping mechanism and a space-saving design.

Advantages of branch terminals:

• Simple installation (sometimes without tools)
• Reliable contacting (permanent connection)
• Expandability (subsequent connection possible)
• Safety (insulated and VDE-compliant design)
• Space-saving (especially in tight installations)

Branch terminals are indispensable in power supply systems, as they enable the structured, safe and expandable distribution of electrical energy. They are used in all areas - from domestic installations to industrial control cabinets and renewable energy systems. In power supply systems in particular, they ensure clear conditions for the distribution of voltages and currents, reduce installation work and enable flexible expansions and maintenance work.

Here you will find an overview of the most important criteria that you should pay attention to when purchasing branch terminals:

When purchasing branch terminals - for example for trade, industry, supply systems or plant engineering - there are numerous technical, qualitative and economic factors to consider. An informed selection ensures that the terminal blocks meet the requirements of the project and can be used reliably and safely.

• The first step is to precisely analyze the technical area of application. The following points should be taken into account:
• Conductor cross-sections and conductor types:
• It must be ensured that the terminal block is suitable for the intended conductor cross-sections - both for single-core and stranded or fine-stranded conductors. Not every terminal is approved for all conductor types.
• Current carrying capacity and voltage:
• The maximum current carrying capacity and the rated voltage of the terminal must match the requirements of the application. Overloading can lead to overheating or even fires.
• Number of poles and branching options:
• Depending on requirements, it may be necessary to realize several outgoing feeders from one infeed. The design of the terminal block must allow this, e.g. with several connection sockets or special multiple branch terminals.
• Product quality is a decisive criterion when purchasing. This is reflected not only in the workmanship, but also in the available test seals and certifications.
• The terminal block should comply with the applicable standards such as DIN EN 60998, DIN EN 60947 and the VDE regulations. This not only ensures safety, but also insurance and legal conformity.
• Important test marks such as VDE, UL, CE or ENEC prove that the terminal block has been tested by independent bodies and is approved for the intended market - particularly important for export or international projects.
• The insulating materials used should be flame-retardant, e.g. in accordance with UL94 V0 and halogen-free - especially when used in public or safety-relevant buildings.
• The type of clamping technology has an influence on the installation time, reusability and reliability of the connection.
• Screw, spring or push-in technology:
• Spring-loaded and push-in terminals offer faster and maintenance-free installation, can be operated without tools and are particularly suitable for series installations. Screw terminals are more robust, but require more time.
• In maintenance or conversion projects, it can be important that the terminals can be opened and reused several times - this is usually the case with high-quality products.
• Easily accessible connection openings, color coding and transparent housings are particularly advantageous in tight installation conditions or when working under time pressure.
• For control cabinets or modular systems, it is essential that the terminal block can be easily integrated into existing systems.
• Some terminals are designed for mounting rails, e.g. DIN rails, others for free wiring or front mounting. The selected variant should match the existing infrastructure.
• In existing systems, it may be necessary to remain compatible with products from certain manufacturers, for example due to connection dimensions or accessories.
• Depending on where they are used, terminal blocks must be able to withstand special conditions.
• The terminal block should be designed for the temperatures prevailing during operation. Extended temperature ranges are often required for outdoor areas or industrial plants.
• In humid environments (e.g. outdoors, in cellars or in agricultural facilities), terminals with a higher degree of protection (e.g. IP54 or higher) are required.
• In mechanical engineering or vehicle construction, terminals must be vibration-resistant. Here, spring-loaded and push-in technologies usually offer better long-term reliability.
• The lowest price is not always the best choice - the decisive factor is the overall calculation of acquisition costs, installation time, service life and risk of faults.
• Reliable delivery in the required quantity is particularly important in time-critical projects. Ideally, the supplier should also enable repeat orders at short notice.
• Large packs are suitable for series production, smaller units for flexible installations. The shelf life of the product should be documented (e.g. for plastics).

When purchasing branch terminals, more than just the price is decisive. Technical requirements, safety standards, installation aspects and environmental conditions must be taken into account. Reliable, durable and standard-compliant connection technology can only be guaranteed by careful selection in accordance with the specific application. High-quality branch terminals pay off in the long term through fewer failures, lower maintenance costs and greater safety.

Branch terminals can be purchased from various suppliers. You will find comprehensive information on manufacturers and suppliers of Branch terminals around the world on Exportpages.