Why use ceramic terminal blocks?

01 September 2025

What are ceramic terminal blocks

One way, two ways, three ways and four ways terminal blocks - TechnicalCeramic.store
One way, two ways, three ways and four ways terminal blocks

Ceramic terminal blocks are electrical connection devices manufactured from high-temperature resistant ceramic materials. They feature one, two or more terminals secured with screws or similar fastening mechanisms, designed to securely join electrical circuits together. Unlike plastic terminal blocks, ceramic versions excel in extreme conditions where heat resistance is crucial.

The main functions of ceramic terminal blocks are to connect and insulate. The block body is made of tough ceramic material that electrically isolates adjacent connections, while the conducting parts are typically brass or other corrosion-resistant metals compatible with copper. This combination creates a secure connection point that maintains electrical isolation even in challenging environments.

The electric terminal block connector, or terminal block, is a device that allows you to organize, connect and isolate a series of electric wires.
The ceramic terminal blocks consist of insulating body and metal inserts made of different materials depending on the use.
They are safe, durable and easy to use. When we talk about "contact" (more commonly pole or pin), we refer to the electric contact point inside the terminal blocks.
The number of poles is a fundamental requirement when choosing a product because it allows to evaluate the quantity of connections necessary for a specific project or application.
The contact pitch refers to the distance between each contact, measured from the center of each hole. The contact pitch is directly related to the number of contacts and it is typically expressed in millimeters (mm).
The body is always composed of sturdy materials as porcelain for insulator. The electrical conductors are manufactured in copper and other metals, which differ according to the application and could also resist corrosion.
Key Features and Benefits of Ceramic Terminal Blocks
Superior Heat Resistance
The most notable feature of ceramic terminal blocks is their exceptional heat resistance. While standard plastic terminal blocks begin to degrade at around 100°C, ceramic terminal blocks can withstand temperatures between 350°C and 500°C, depending on the specific model. Some specialized versions can even withstand higher temperatures.
Excellent Electrical Insulation Properties
Ceramic terminal blocks maintain excellent electrical insulation properties even at high temperatures. Thanks to the high dielectric strength and insulation of ceramic, they ensure reliable electrical isolation in applications where maintaining circuit integrity is critical.
Exceptional Durability and Longevity
Ceramic terminal blocks offer exceptional mechanical strength and durability, making them resistant to shock, vibration, and mechanical stress. This robust construction ensures long-term reliability in industrial and demanding environments, avoiding the need for frequent replacement and maintenance.
The high-quality materials used in ceramic terminal blocks allow them to maintain structural integrity under conditions that would cause plastic alternatives to rapidly deteriorate.
Excellent chemical and corrosion resistance
Another significant advantage of ceramic terminal blocks is their exceptional resistance to chemicals, oils, and corrosive substances often found in industrial environments. Ceramic material does not degrade when exposed to most chemicals, ensuring long-lasting performance in harsh environments where other materials might fail.
Fire Safety and Non-Flammability
Ceramic terminal blocks are inherently non-flammable and are therefore ideal for applications where fire safety is a concern. They do not contribute to fire risk and can maintain circuit integrity in the event of a fire, providing crucial continuity for alarm and emergency shutdown systems.
 
There is a big range of products and different types of terminal blocks dedicated mainly to the electrical, electronic and industrial sectors. Every specific range of products is different in order to adapt the different technical applications and conditions of use.
 
 
Do you want to discover our catalog of ceramic terminal blocks?
 
 
 
Ceramic terminal block and stainless steel inserts - TechnicalCeramic.store
Ceramic terminal block and stainless steel inserts

Which terminal blocks choose AND WHICH APPLICATIONS

The technical ceramic insulating body is designed to withstand high temperatures. The ceramic terminal blocks are excellent in electric furnaces, power resistors and where there are high temperatures.
 
In some particularly heavy temperature and corrosion  applications there are terminal blocks with AISI 304 stainless steel contacts.
 
Remember! Only quality raw materials guarantee excellent insulation, even at high voltages, high mechanical strength and excellent chemical resistance.
 
The most versatile contacts for temperature use are nickel-plated brass. Brass, which is an alloy composed of copper and zinc, is currently used in many industrial sectors. It tends to be characterized by good resistance to corrosion.
This parameter can be increased even more by chemical nickel plating.
The carryover of material, deposited on the surface of the object, lengthens the life of the components.
This aspect becomes even more important for components that are "operating" in the most difficult conditions, such as in environments where corrosive substances are present.  
 

Why choose ceramic terminal blocks?

 
Electrical insulation
Our ceramic terminal blocks guarantee high electrical insulation, even at high temperatures.
Heat resistance
They are made to guarantee the highest standards of resistance to high temperatures.
Corrosion resistance
Metal inserts are produced and treated
to resist corrosion.
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