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This section provides an overview for noise cut transformer as well as their applications and principles. Also, please take a look at the list of 21 noise cut transformer manufacturers and their company rankings. Here are the top-ranked noise cut transformer companies as of December, 2024: 1.ETA Transformer Manufacturing Industry, 2.Ross Engineering Corp., 3.Breve Tufvassons Sp z o.o.
Table of Contents
A noise-cut transformer is a device designed to prevent noise interference. It is a trademark developed by DENKEN SEIKI KOGYO K.K. in 1960 and is also called Isolation Transformers, although its common names are fault wave isolation transformers and transformers for noise suppression. Noise-cut transformers are a practical application of transformer-type noise prevention elements.
Since it separates and isolates the source of the noise and the electric circuit on the side disturbed by the noise, it is highly effective in preventing noise. Also, because it is a separate isolation type, it can function even in a poor electromagnetic environment.
Many modern devices are high-speed and multifunctional, which makes our lives more convenient. Since these devices are operated by micro-voltages, they may malfunction due to noise entering from the outside.
Lightning, amateur radio, automobiles, discharge equipment, home appliances, and medical equipment are all subject to external noise intrusion. Noise Cut Transformers can prevent these noises, and the noise itself that they emit will not leak into external circuits.
Noise Cut Transformers prevent noise from entering the secondary side. There are two types of noise: common mode and normal mode.
In the case of common mode noise, low-frequency noise (around several 10 kHz) can be somewhat attenuated by Noise cut transformers. However, as the noise frequency increases, noise penetration into the secondary side increases due to the capacitance between the primary and secondary sides of the transformer.
In this case, noise-cut transformers can prevent noise intrusion by adding an electrostatic shield between the primary and secondary coils and grounding it.
Normal mode noise is output on the secondary side as it is, so the transformer itself has no suppression effect. For example, the frequency of noise caused by lightning is very high compared to the frequency of power supplies for general equipment (50/60 Hz).
By taking advantage of this, noise in the normal mode can be suppressed by having the filter pass through the lower frequencies of the power supply and weaken the higher frequencies.
In addition to the structure of conventional isolation transformers, the structure of noise-cut transformers consists of multiple encircling electromagnetic shielding plates around the periphery of the coil transformer. In addition, the coil arrangement, core material, and shape are designed so that the magnetic flux of high-frequency noise does not interlock with each other. This prevents the transmission of noise due to capacitive coupling and electromagnetic induction.
When noise is to be cut, the usual measure is to isolate the source of the noise. The actual isolation measure is almost always a photocoupler on the circuit. If a photocoupler is not used, the method of dealing with the problem is a noise-cut transformer.
For cost and space reasons, it is preferable to use a photocoupler on the circuit board, but if a circuit board is not available, a noise-cut transformer is used. However, noise-cut transformers are not a panacea, and the secondary winding is also affected by noise from the primary winding. The use of noise-cut transformers can solve this problem.
Some measures can be taken to prevent noise, even in locations with different potentials between the ground of an electrical circuit and the earth, or in cases where grounding is not possible. One such measure is to install noise-cut transformers.
If this is still ineffective, ensure that the area where noise-cut transformers are installed makes contact with the ground over as large an area as possible. Another effective method is to make the input and output cables into shielded wires that can shield noise, and install this shielded wire and the case of noise-cut transformers over a large area. This is expected to improve the noise rejection effect.
*Including some distributors, etc.
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Magnelab, established in 1968 and based in Longmont, USA, is a manufacturer of AC current sensors and current transformers. The company designs and manufactures custom magnetics such as AC and DC current sensors, current transducers, voltage transformer and Rogowski coils. It also offers to build customized products from print or by design. The company offers resources like white papers for understanding its products and a blog covering educational topics related to magnetics. It has acquired ISO 9001:2015 certification and has RoHS and REACH SVHC declarations.
BLOCK, over its 80-year history, has evolved into a global manufacturer of transformers, power supplies, reactors, and EMI filters. Its aim of controlled, rapid, and precise in-house production ensures the highest quality standards. A pivotal development center, featuring over 80 engineers and technicians, manages an extensive standard product portfolio while facilitating customization and product development. This allows the company to certify and deliver custom-made products within three weeks from its Verden production sites, ensuring quality across all stages of the development and manufacturing process.
Ross Engineering Corporation, founded in 1964 and based in Campbell, California, is a manufacturer of a wide range of high-voltage electronic and electro-mechanical devices and is ISO 9001 certified. It stocks over 25 lines of high voltage devices such as voltmeters, relays, and probes used in several fields such as industrial plants, communication transmitters, and power supplies with ranges from 0.01mV to 1,200,000 V. The company is ISO/IEC 17025:2017 certified and has a calibration lab for testing and calibrating dividers, relays, and probes up to 450kV.
Jefferson Electric, headquartered in Dyersburg, Tennessee, is a manufacturer and supplier of magnetic products specializing in dry-type low- and medium-voltage transformer solutions. The company’s product portfolio consists of dry-type low- and medium-voltage transformers, including ventilated, encapsulated, and industrial control transformers. Their product range also includes medium voltage transformers and accessories. The company also offers custom solutions with tailored and modified designs to meet the client’s specific requirements. With an ISO-backed quality system, Jefferson Electric serves various industries and applications across North America.
Olsun Electrics Corporation, a company established in 1950, based in Richmond, Illinois, USA, is a manufacturer and supplier of dry type transformers and process control systems. The company provides quality power and distribution transformers for various industrial applications such as oil and gas, power plants, chemical, nuclear, and biopharmaceutical. It has a range of products such as cast coil, core and coil, encapsulated, pad mounted, drive isolation, grounding, harmonic mitigation, k-rated, marine duty, multi-pulse, noise attenuation, step up, test, and triplex transformers. The company is known for its design flexibility and modernization in the transformer manufacturing.
Johnson Electric Coil Company, a company established in 1934, based in Antigo, Wisconsin, USA, is a manufacturer and distributor of custom transformers and conductors. The company provides quality power and distribution transformers for various industrial applications such as oil and gas, power plants, chemical, nuclear, and biopharmaceutical. It has a range of products such as cast coil, core and coil, encapsulated, pad mounted, drive isolation, grounding, harmonic mitigation, k-rated, marine duty, multi-pulse, noise attenuation, step up, test, and triplex transformers.
MeterTest Sp. z o.o., founded in 2005 and headquartered in Świdnica, Poland, is a manufacturer of advanced metering systems for the energy industry. The company offers a comprehensive product catalog, including three-phase meter test equipment, single-phase meter test equipment, three-phase power calibrators and testers, three-phase network analyzers, and testers for electricity meters and instrument transformers. These products have applications in oil and gas refineries, waste and sewage treatment, controlling chemical processes through electrochemical methods, maintaining a consistent liquid level in industrial tanks, and managing the flow of liquids through pipelines.
TDK Electronics, established in 1935 and headquartered in Tokyo, Japan, is a developer, manufacturer of electronic components and systems. Its product portfolio spans capacitors, ferrites, and inductors, including piezo and protection devices. The company also offers sensors and sensor systems, covering temperature, pressure, magnetic, and MEMS sensors. Furthermore, TDK provides power supplies, energy devices, magnetic heads, and more, all branded under TDK, EPCOS, InvenSense, Micronas, Tronics, and TDK-Lambda, catering to diverse electronic needs. The company operates about 20 development and manufacturing sites, along with a network of design, manufacturing locations, and sales offices situated in Asia, Europe, North America, and South America.
Hammond Manufacturing, established in 1917 and headquartered in Guelph, Ontario, is a manufacturer that specializes in electrical and electronic enclosures, cabinets, racks, and outlet strips. The company offers a wide range of products, including small enclosures, rack cabinets, and power distribution and surge protection for electronic devices. It also provides die-cast aluminum enclosures, watertight enclosures, and plastic enclosures. Its enclosures are designed to protect and house electrical and electronic components. The company has achieved ISO 9001 Certification and RoHS Compliance. It serves a wide range of industries, including automotive, mining, petrochemical, packaging, and government.
EREMU, SA, founded in 1958 and located in Astigarraga, Guipuzcoa, is a manufacturer and repairer of electrical transformers and other electrical equipment. The company offers a range of products, including low-voltage transformers, automatic voltage regulators, cast resin transformers, three-phase autotransformers, and light flow regulators. These transformers have applications in laboratory power supply, aeronautics and defense, renewable energy, telecommunications, and solutions to electrical network issues. It complies with international manufacturing and testing standards, such as IEC, UNE, NEMA, and UL.
West Coast Magnetics, headquartered in Stockton, California, is a manufacturer of transformers and inductors and was founded in 1974. They produce electronic components including filters, coils, transformers, inductors, and also chokes, which are available in various frequency, power, and voltage ratings, suitable for wireless charging, power filtering, buck-boost, and high ripple applications. West Coast Magnetics is ISO 9001 and ISO 13485 certified, ITAR registered, and also complies with RoHS regulations.
APC (American Power Conversion Corporation) is a manufacturer and developer of physical IT infrastructure solutions, batteries, and software incorporated in 1981 and based in West Kingston, Rhode Island. The company is a Schneider Electric flagship brand, offering a wide range of products including security and environmental monitoring devices, software for sensors or alarms, server racks and enclosures, and uninterruptible power supplies (UPS) to protect from power outages. APC also provides product maintenance and repair, installation, and recycling services to various clients ranging from electric utility companies to defense contractors.
Wah Hing, founded in 1980 and headquartered in Dongguan, Guangdong, is a manufacturer of transformers and power switching supplies. The company offers a diverse product range, including a solar photovoltaic power generation system, PV three-phase isolation transformer, three-phase filter reactor, golf cart lead-acid battery charger, and portable EV charger. These products have applications in railway auxiliary power systems, UPS uninterruptible power systems, EPS emergency power systems, power distribution systems, and medical test equipment.
Trafomodern Transformatorengesellschaft m.b.H. was founded in 1945 and is headquartered in Burgenland, Austria is a manufacturer and supplier of inductive electrical components and power transformers. The company offers products including single-phase control transformers with preferred rated voltages, single-phase matching transformers, GW– DC power supply units, DDK – three-phase commutating chokes, and DT – three-phase matching transformers. These products are used in machine and plant construction, renewable energy, electrical mobility, and electrical drives.
PeakTech Prüf- und Messtechnik GmbH, established in 1957 and based in Ahrensburg, Germany, is a manufacturer and supplier of electronic measurement technology. The company's product portfolio includes multimeters, voltage testers, thermal imaging cameras, isolating transformers, and sound level meters, as well as calibrators. These products are applied in various industries, including electrical engineering, environmental monitoring, aviation, telecommunications, and research and development. The company provides customer services, including technical support, repair, service requests, and product development.
Ranking as of December 2024
Derivation Method| Rank | Company | Click Share |
|---|---|---|
| 1 | ETA Transformer Manufacturing Industry |
10.1%
|
| 2 | Ross Engineering Corp. |
8.7%
|
| 3 | Breve Tufvassons Sp z o.o |
7.4%
|
| 4 | MeterTest Sp. z o.o. |
6.0%
|
| 5 | TDK Electronics |
6.0%
|
| 6 | trafomodern Transformatorengesellschaft m.b.H. |
5.4%
|
| 7 | APC |
5.4%
|
| 8 | Dongguan Wahhing Electrical Appliance Co., Ltd |
4.7%
|
| 9 | MGM Transformer Company |
4.7%
|
| 10 | Jefferson Electric Inc |
4.7%
|
Derivation Method
The ranking is calculated based on the click share within the noise cut transformer page as of December 2024. Click share is defined as the total number of clicks for all companies during the period divided by the number of clicks for each company.Number of Employees
Newly Established Company
Company with a History
*Including some distributors, etc.
*Including some distributors, etc.
| Country | Number of Companies | Share (%) |
|---|---|---|
|
United States of America
|
7 | 46.7% |
|
Japan
|
2 | 13.3% |
|
Poland
|
1 | 6.7% |
|
Canada
|
1 | 6.7% |
|
Spain
|
1 | 6.7% |
|
Austria
|
1 | 6.7% |
Belgium
|
1 | 6.7% |
Turkey
|
1 | 6.7% |
124 products found
124 products
Denken Seiki Research Institute
290+ people viewing
Last viewed: 1 day ago
It is a long -selling product with high versatility. This is the most standard product that satisfies all basic requirements as a noise cut transf...
Denken Seiki Research Institute
230+ people viewing
Last viewed: 18 hours ago
Recommended for noise measures for large equipment and buildings. It is a medium to large -capacity product that satisfies all the basic requireme...
SAM Co., Ltd.
330+ people viewing
Last viewed: 13 hours ago
■Features - Boasts a common mode noise attenuation ratio of -12dB. - Unique step-shaped cut core achieves industry-leading compactness and weight r...
10 models listed
SAM Co., Ltd.
270+ people viewing
Last viewed: 23 hours ago
■Features ・The highest level of noiseless transformer ・For line noise EMC countermeasures (EMI+Immunity) ・For harmonic noise countermeasures ・S...
8 models listed
Denken Seiki Research Institute
270+ people viewing
Last viewed: 7 hours ago
It is a model that aims to balance performance and cost performance. It is a medium -capacity product that satisfies all basic requirements as a d...
Denken Seiki Research Institute
320+ people viewing
Last viewed: 7 hours ago
It is a model that aims to balance performance and cost performance. It is a medium -capacity product that satisfies all basic requirements as a d...
SAM Co., Ltd.
190+ people viewing
Last viewed: 5 hours ago
■Features -The most compact type in our "Noise Zero Transformer" series. ・Can also be used for printed circuit boards and small equipment/equipmen...
6 models listed
SAM Co., Ltd.
380+ people viewing
Last viewed: 3 hours ago
■Features - Boasts a common mode noise attenuation ratio of -110dB. -Achieved the industry's top class compactness and weight reduction for sheet c...
9 models listed
Denken Seiki Research Institute
240+ people viewing
It is a model that is suitable for CE marking. This is a medium -capacity product that meets all the basic requirements as a noise cut transformer...
SAM Co., Ltd.
240+ people viewing
Last viewed: 20 hours ago
■Features - Slim type "NU series" is housed in a sturdy stainless steel case. ・Effective when moving or not touching the transformer. ・Effective ...
10 models listed
Denken Seiki Research Institute
270+ people viewing
Last viewed: 7 hours ago
It is the latest model that considers safety and ease of use. It is a noise cut transformer "noise cut transformer ️" that improves safety and eas...
Denken Seiki Research Institute
210+ people viewing
A decisive effect on noise measures leaking from the inverter. This is a large -capacity disorder wave blocking transformer, "noise cut transforme...
SAM Co., Ltd.
180+ people viewing
Last viewed: 8 hours ago
■Features ・The slim type "NU series" is covered with a stainless steel cover. ・Input/output can be changed to cable specifications.
4 models listed
SAM Co., Ltd.
230+ people viewing
Last viewed: 10 hours ago
■Features ・An inexpensive outlet connection type that pursues cost. ・Effective when moving or not touching the transformer. ・Effective even when...
7 models listed
Denken Seiki Research Institute
260+ people viewing
Last viewed: 1 hour ago
It is the latest model of the three -phase that improves noise attenuation performance and considers safety and ease of use. "Noise -cut transform...
Akitek Co., Ltd.
40+ people viewing
Last viewed: 18 hours ago
Aihara Electric
50+ people viewing
Last viewed: 20 hours ago
Very Fast Response
■Noise protector created using advanced technology Transformers protect lines and equipment from noise. It is a multi-functional product that uses ...
Denken Seiki Research Institute
520+ people viewing
Ideal for incorporating into the device. It is a small -capacity and low -priced disorder wave blocking transformer that can take noise measures a...
SAM Co., Ltd.
80+ people viewing
Last viewed: 1 day ago
■Features ・An inexpensive outlet connection type that pursues cost. ・Effective when moving or not touching the transformer. ・Effective even when...
Keisei Co., Ltd.
20+ people viewing
Last viewed: 20 hours ago
Standard Response
■Applications Effective for removing and reducing noise on video monitors of surveillance and security camera systems.
SAM Co., Ltd.
290+ people viewing
Last viewed: 8 hours ago
■Features ・Introducing ultra-thin noise-free transformer ・High performance with the same conventional design concept ・High efficiency despite be...
10 models listed
Denken Seiki Research Institute
280+ people viewing
Last viewed: 59 minutes ago
This model has obtained the UL standard "UL1446" and the UL standard "UL5085-1, UL5085-2" for the UL standard for insulators. It is a medium -capa...
Denken Seiki Research Institute
190+ people viewing
Last viewed: 1 day ago
It is a thin shape that can be installed in a narrow space. It is a thin -shaped disorder wave blocking transformer, such as racks and boards, is ...
Denken Seiki Research Institute
230+ people viewing
Last viewed: 15 minutes ago
It has been well received by state -of -the -art research institutions, including nuclear physics. It is a noise cut -off transformer "noise cut t...
Denken Seiki Research Institute
400+ people viewing
Recommended for power supply in radio dark rooms. It is a middle to large -capacity disorder wave blocking transformer "Noise Cut Trans ™ ️" with ...
Denken Seiki Research Institute
320+ people viewing
Last viewed: 1 day ago
By maximizing the core, coil, shield, case, and lead wires, it is a product that has reached the highest performance level as a disability wave blo...
Denken Seiki Research Institute
180+ people viewing
Last viewed: 1 day ago
We will manufacture orders for various custom -made specifications.
Denken Seiki Research Institute
300+ people viewing
Last viewed: 1 day ago
It is a model with an outlet receptuta. It is a small / low price wave blocking transformer "noise cut transformer ™" with an output connection co...
