Terminal Blocks
Your Professional Terminal Blocks Supplier
We are a manufacturer of all kinds of pushbutton switches. From the factory - direct to the hands of consumers, here we save (total distribution-wholesalers-stores) and other channels, for you to provide a simple direct and effective supply! Besides our existing molded products, YongYuan also can production of products according to the drawings or samples from our customers.
Why Choose Us
24-Hour Service
Our dedicated 24-hour online support ensures prompt responses, providing you with an excellent shopping experience. Feel free to reach out with any questions at any time.
Professional technical support
We have an experienced technical team that can provide comprehensive technical support from product design and process optimization to maintenance.
Our Certificate
Under the strict management of ISO9001 quality system, environmental system ISO14001, the company's products have passed a series of international standard certificates such as UL, VDE, CCC, CE (LVD), CE (EMC).
Customized solutions
Every customer is unique, which is why we offer tailored solutions to meet your specific requirements. We offer technical support that is second to none.We take pride in our rapid response and flexibility to ensure your needs are met.
First and foremost, terminal blocks are relatively cheap compared to other connectors – they’re not going to cost as much. They make plenty of sense time wise as well as financially.
Terminal blocks tend to save you time; connecting wires to one isn’t an elaborate process and can easily done by any shop. In an emergency, you should be able to even carry out temporary repairs with equipment to hand on the road.
Another benefit is the safety features on a terminal block. Terminal blocks increase safety by grounding, isolating, and protecting the other components in the electrical circuit.
Types of Terminal Blocks
Screw Terminals
Screw terminals are the most used connection methods in this method wires will be inserted into terminal and clamped with the use of a screw. These terminals are commonly used in domestic as well as commercial wiring where voltage and current demands will be moderate. Over-tightening the wire while fixing can damage the inserted wire/cable which further may cause unreliable and dangerous connection.
Barrier Terminals
Barrier terminals are similar to screw terminals and use screw to hold the cables although they have more than one termination point for multiple cables and have small barriers between every terminals. Some Barrier terminals also have a small lid and an enclosure to protect the cabling. These are commonly used in domestic wiring and also in high voltage applications which requires arcing and short circuits prevention.
Push-fit terminal blocks
Small spring-loaded shafts in Push-fit terminal blocks allows cable to enter the terminal block in one direction and hold it in place without allowing it to leave. This Technology depends on a spring having enough force to keep the wire in contact with the conductive body. Disadvantage of these terminals is it’s not designed to be reused and do not have removing shaft.
Pluggable terminal blocks
Pluggable terminal blocks have a cable entry to allow the connection of a wire or cable and also a plug output which can be connected to a socket. This is very useful for connections which are expected to be removable for inspection purpose or for servicing purpose.
• The body is the primary casing that accommodates the terminals and offers structural reinforcement.
• Contacts: Metal parts that make electrical contact with wires.
• Clamps are devices utilized to fasten wires securely, employing mechanisms like screws or spring-operated clamps.
• Insulators refer to substances that inhibit the flow of electricity between connectors and the surface on which they are mounted.
• Identification tags are utilized as labels or markers to indicate connections, simplifying maintenance and problem-solving processes.
Installation Tips
Properly installing terminal blocks is essential to ensure peak performance and safety. Here are some recommendations to consider:
Implementing precise methods in wire handling: Verifying accurate removal, arrangement, and conclusion of wires.
Properly applying tightening torque is crucial to ensuring secure connections without causing harm to conductors.
Insulation involves the utilization of insulating barriers and covers to shield against unintended contact.
Identification Labeling: Ensuring clear and precise labelling of connections to facilitate identification during installation and maintenance.
Key Terminal Block Electrical Considerations
Current Rating
The current rating is often the most important parameter to consider in terminal block designs. The current rating is based on the conductivity of the terminals, cross-sectional area, and the corresponding heat rise. Operating at too high of a current can cause overheating and damage of the terminal block, leading to major safety concerns. It is best practice to use a terminal block that is rated for at least 150% of the max current that is expected in the system.
Voltage Rating
The voltage rating is in part determined by the dielectric strength and pitch of the terminal block housing. The maximum system voltage of the application must be less than the voltage rating. Any voltage surges in the system should also be evaluated when selecting the terminal block.
Pole Count
The number of individual circuits within the terminal block is also known as the pole count. This can be as few as a single pole, and as high as 24 poles and beyond, based on how many individual circuits are needed in the specific application.
Pitch
A terminal block’s pitch is defined as the center distance from one pole to the next. The pitch of the connector is often determined by the overall rating of the terminal block where factors like voltage/current, creepage, and clearance are considered. Common industry pitches would be, but are not limited to, 2.54 mm, 3.81 mm, 5.0 mm, and 7.62 mm.
Wire Size/Type
The minimum and maximum wire size that the terminal block can accept would be a function of the voltage/current rating. In addition to making sure the wires used will physically fit into the terminal block, the type of wire should also be considered. Stranded or multi-core wire is typically used for screw terminals, and single-core is typically used for push-in style terminal blocks. In North America wire size is specified in units of American wire gauge (AWG). Wire size can also be specified as mm2.
Application of Terminal Blocks
Ransportation
Terminal blocks are found in vehicles, railways, and subway systems, used in electrical systems, control panels, and signal systems where high reliability is crucial.
Energy & Lighting
They are essential for distributing power in electrical substations and are used in modern energy-efficient lighting (LED) systems and municipal streetlights.
Medical & Aerospace
In high-precision applications, terminal blocks ensure the accuracy and safety of medical equipment, while in military and aerospace, they meet stringent durability requirements for radar systems and spacecraft.
FAQ
We're professional terminal blocks manufacturers in China, providing customized terminal blocks for sale. Feel free to wholesale terminal blocks and get quotation from our factory.