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Ceramic Insulators

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Ceramic electrical insulators are inserted into control boards and boxes as a heat sink but are most frequently employed to create non-conductive bridges between electronic components. They are formed of porous clay that is either red, brown, or white, and they have high dielectric strength and steady and minimal electrical loss. In addition, they are simple to maintain and immune to stains and other residue types. Because of their incredibly high electrical current resistance, ceramics have been utilized as electric insulators for a long time. Read More…

Ceramic Insulators Ceramic insulators are ceramic materials used to insulate electrically-conductive materials or temperature-controlled enclosures. In the context of electrical insulation, ceramic insulators are usually limited to the insulation of electrically conductive materials on an industrial or municipal scale.
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Leading Manufacturers

Myrtle Beach, SC  |  609-397-8330, 609-397-8341

As a manufacturer and stocking distributor of industrial and technical ceramics, LSP carries the most diversified inventory of ceramic tubes, spacers, bushings, etc. in the industry.

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LSP Industrial Ceramics, Inc. $$$

Cheswick, PA  |  412-406-7171

C-Mac International, LLC is a custom ceramics supplier. We provide advanced ceramic component parts manufacturing for a variety of industries and provide solutions to many ceramic needs.

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C-Mac International, LLC $$$

Quakertown, PA  |  215-536-3500

Insaco provides custom grinding and machining services to fabricate precision parts from sapphire, quartz, and most technical ceramics including alumina, zirconia, silicon carbide, silicon nitride, aluminum nitride, and others.

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Insaco Inc. $$$

Fremont, CA  |  510-249-9700

Applied Ceramics is a fabricator of custom-made ceramic parts designed for semiconductor, solar, fuel cell, oil drilling, nuclear, and numerous other industries. Materials include ACI-995 Alumina, Zirconia, and more. Our extensive experience with precision designs supported by our team of specialists ensures that our customers have the ideal solution to meet the needs of their application. To get started, contact us today!

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Applied Ceramics $$$

Newark, NY  |  888-285-5994

Refractron partners with companies that have fluid control applications requiring plug, seat, ball & seat or check ball components to name a few and that require a lower cost, strong, tough product of low wear. We manufacture ceramic plungers for high pressure pumps and waterjet cutting. Our aquaculture diffusers are custom manufactured in the shape of discs, plates or tubes constructed from glass-bonded silica, porous alumina or silicon carbide.

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Refractron Technologies Corp. $$$

Hubertus, WI  |  800-869-2008

Technical Products, Inc. has been manufacturing and distributing a wide variety of ceramics for 30 years. We are capable of meeting the demands of our constantly changing industry with our modern, fully equipped facility. We can produce prototypes as well as full production orders. Visit our website to learn more about our ceramic manufacturing capabilities.

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Technical Products, Inc. $$$
placeholder image LSP Industrial Ceramics, Inc. C-Mac International, LLC Insaco Inc. Applied Ceramics Refractron Technologies Corp. Technical Products, Inc.

ceramic fish spline insulators

How Ceramic Insulators are Used

From power distribution centers to mobile phones, ceramic insulators are used in various electronic applications. Due to their non-conductivity and remarkable mechanical robustness, ceramics make excellent insulating materials. Power lines, coaxial cables, and circuit boards are examples of places where ceramic insulators shield against electromagnetic (EM) waves, fire risks, power surges, and short circuits. Ceramic insulators are widely used because of their capacity to retain heat. They are also simple to build and form into various designs. As a result, they play a major role in many applications used for controlling power.

Uses of Ceramic Insulators


An element of a pole ceramic insulator is a spool insulator fastened to a bracket, which is connected to the top and bottom of the spool by a thin rod that runs through the middle of the insulator. A bolt in the middle of the bracket is used to fasten them to surfaces such as walls, poles, or ceilings. Ceramic pole insulators can adapt and change when the connected line's angle does.

ceramic insulators for electric cables


The main job of insulators is to control current flow and prevent it from going toward the earth. Safety ceramic insulators stay put and offer insulation if wires are severed and fall to the ground. Wires won't touch the earth because their placement is ensured. Different connections are produced for ceramic safety insulators based on the application’s demands. For example, if a pole were to fall, the ceramic insulator would ensure that there would be no electricity in the lowest part of the system.

Heat Applications

Ceramic insulators are commonly employed in applications where there is tremendous heat. In furnaces, heaters, and ovens, ceramic insulators support the heating elements. Ceramic is the ideal insulation material for heated applications because of its durability, extended life, and capacity to maintain its shape and size under pressure. Ceramic insulators support and divide heating elements in many heaters.

Mechanical Stress

Ceramic insulators with mechanical tension are intended to be used when cables or wires hanging overhead pull on the insulator. They are used with overhead wires, radio antennas, and power lines, like support ceramic insulators. They might be positioned in the space between two power lines to keep them apart. Ceramic insulators with mechanical tension are ideal for keeping wires taut and straight.

Types of Ceramic Insulators

Ceramic Standoff Insulators

Ceramic standoff insulators limit current to the intended path and prevent electricity from hopping between components. They can be found in a variety of settings, but transformer current regulators are where they are mostly found. Ceramic standoff insulators guard against power deterioration and cut down on energy waste.

Standoff ceramic insulators can survive high temperatures produced by low-speed resistors, just like most ceramic insulators can. They come in cylindrical shapes that are round, square, or rectangular and are great insulators for installing fuses or heavy-duty cables.

Ceramic Suspension Insulators

To carry electricity lines, suspension ceramic insulators are suspended from the cross arms of towers or other supporting structures. The disks hung on top of one another, known as a string, are the primary components of the remaining ceramic insulators. Metal connections connect ceramic suspension insulator threads.

Hollow Ceramic Insulators

Bushings for power and instrument transformers, wall bushings, circuit breakers, surge arresters, and cable terminals are all made of hollow ceramic insulators. They are manufactured in various sizes with cylindrical, conical, or spherical body shapes. High mechanical resistance and electrical insulation are both possible with hollow ceramic insulators.

Ceramic Insulator Benefits

Strength of Dielectric

For various electrical wiring and circuits, ceramic insulators are used because of this particular characteristic. Despite the circumstances, however, ceramic insulators deliver a great performance due to their high dielectric strength and minimal electrical loss.

Corrosion Resistance

Ceramic insulators are immune to the effects of rust and corrosion since they contain no metal at all. They can, therefore, be mounted on fence posts, power line crossbars, and other exterior electrical lines without being influenced by the surrounding environment.


Since ceramic materials are made of powder, it might seem that they wouldn't be durable enough to sustain repeated use. However, ceramic insulators are four times tougher than stainless steel, which is astounding. This specific attribute guarantees their longevity.

Resistance to Wear

The capacity of ceramic insulators to maintain their quality and look goes hand in hand with their hardness. Hardness and wear resistance work together to ensure robustness and durability, which are crucial for sustainability.

Technical Features

No matter the circumstances, any component needed to defend electrical wiring must maintain its mechanical integrity. Ceramic insulators are very good at preserving their mechanical characteristics to offer reliable performance over time.

multi groove ceramic insulator

Ceramic Insulator Informational Video


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