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This section provides an overview for trimmer potentiometers as well as their applications and principles. Also, please take a look at the list of 19 trimmer potentiometer manufacturers and their company rankings. Here are the top-ranked trimmer potentiometer companies as of April, 2026: 1.VTRONS TECHNOLOGY CO.,LIMITED, 2.Song Huei Electric Co., Ltd., 3.KLS Electronic.
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A trimmer potentiometer is a variable resistor whose resistance value can be changed.
They are also called trimmer resistors or trim potentiometers because of their role in adjusting (trimming) the resistance value of a circuit in an electronic device. They adjust for variations due to individual differences in other electronic components.
The resistance of a trimmer potentiometer is adjusted by turning a knob with a driver. There are two types: top-turned and side-turned, and single-turn and multi-turn knobs.
Trimmer potentiometers are used in a variety of products, including communications equipment, measuring instruments, medical equipment, audiovisual equipment, office equipment, and general electronic equipment. They are applied in situations such as post-production timing adjustment, temperature adjustment, and display brightness adjustment.
Typically, once set, they operate as fixed resistors without being seen by the end user, but they may need to be readjusted during maintenance.
Trimmer potentiometers are often used in hobbyist electronics work, as they are useful for fine-tuning circuit boards.
The principle of the trimmer potentiometer is simple. When voltage is applied to both terminals (terminals 1 and 3) of a resistive element, the physical position of the contacts (slider or wiper) that move on the resistive element changes the resistance between terminals 2 and 1 (or 3), which is connected to the slider.
A trimmer potentiometer has two roles. Voltage adjustment, in which a larger voltage is lowered to obtain the required voltage. And current adjustment, in which the resistance value is adjusted to change the current value.
When used for voltage adjustment, a trimmer potentiometer is used as a 3-terminal element: voltage is applied between terminals 1 and 3, and the voltage divided by the voltage is taken from terminal 2.
When used for current regulation, a trimmer potentiometer is used as a 2-terminal element, and voltage is applied between terminals 1 and 2 to regulate the current. However, it is safe to leave the unused No. 3 terminal open and connect it to the No. 2 terminal.
The resistance between the two ends of a trimmer potentiometer and the total resistance vary. If the total resistance value is small, the variable range becomes narrower. On the other hand, if the total resistance value is large, the variable range becomes large. However, the setting accuracy becomes lax. Generally, a trimmer potentiometer is selected so that adjustment can be made over a variable range of half the total resistance.
*Including some distributors, etc.
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Bourns, Inc. is a family-owned company founded in 1947 and currently headquartered in Riverside, California. Bourns is a developer, manufacturer, and supplier of electronic components for several industries including automotive, industrial, instrumentation, medical, consumer, and portable electronics. Bourns operates in 4 market segments: automotive, circuit protection, power conversion, and sensing. The automotive segment produces sensors for almost every use in vehicles including steering, stability, fuel management, and temperature control. Power conversion segment products are used in renewable energy and automotive power. Sensing products are also used in heavy equipment, medical equipment, and welding equipment.
Ohmite, established in 1925 and headquartered in Warrenville, Illinois, is a manufacturer of resistive products. Their product offerings incldue wirewound resistors, thick film resistors for high temperature and humidity resistance, and chip resistors for space-constrained applications. Additionally, they provide power resistors designed to handle high currents and voltages, suitable for power supplies and motors. Ohmite's diverse product range also includes custom-designed resistors tailored to meet specific customer requirements. These products find extensive application across various industries, including electronics, automotive, and industrial.
Vishay Intertechnology, Inc. (Vishay) was incorporated in 1962 and is headquartered in Malvern, Pennsylvania. The company serves the industrial, automotive, telecommunications, consumer products, and medical end markets and sells its products under numerous brand names inlcuding Siliconix, Draloric, Beyschlag, UltraSource, and Applied Thin-Film Products. The company manufactures and sells discrete semiconductors and passive electronic components in globally while operating in six market segments: MOSFETs, diodes, optoelectronic components, resistors, inductors, and capacitors.
HOZAN TOOL INDUSTRIAL CO., LTD., established in 1946 in Naniwa-ku, Osaka, Japan, is a manufacturer and supplier of electronics and bicycle tools. Their product range includes soldering irons for electronics assembly, various types of multimeters for electrical measurements, pliers for wire manipulation, diverse screwdrivers for fastening tasks, and wire strippers for precise wire preparation. Additionally, they also offer chemical products such as anti-rust oils, freezer sprays, cutting oil, and dusters.
Hokuriku Electric Industry Co. LTD., founded in 1943 and headquartered in Toyama, Japan, is a manufacturer and supplier of electronic components. Some of its products include circuit modules, fixed resistors, printed circuit boards, variable resistors, and NTC Thermistors, and it has eight domestic affiliate companies and 11 overseas affiliate companies, including HDK America Inc., and HDK China Ltd. The company is ISO 14001 certified, and it is working on producing products that are RoHS compliant. Its net sales for the 2022 fiscal year were 45.46 billion Japanese Yen, which was a 5.01 billion YoY increase from 2021.
Teikoku Tsushin Kogyo Co., Ltd. (TTKC) is a Japanese electronic component manufacturer headquartered in Kanagawa. Established in 1944, the company initially specialized in wireless communication parts before expanding to the distribution and production of various sensors, potentiometers, switches, and resistors under the brand name Noble Electronics. The company has several sales outlets throughout Japan, as well as overseas offices in the US, China, Korea, Singapore, and Thailand. From their many manufacturing locations, TTKC allows clients to customize products used in a range of applications, including industrial equipment, home appliances, A/V equipment, and health care.
KLS Electronic, founded in 2002 with headquarters and factories in China, is a manufacturer of electronic components that has expanded to have more than 10 subsidiary companies. The company's extensive product line includes resistors, inductors, wiring accessories, automotive connectors, and heat sinks, which are supplied to the industrial automation, instrumentation, power, transport, shipbuilding, and new energy sectors, among others, across 30 regions worldwide. KLS Electronic also holds ISO 9001 management system certificates.
Murata Manufacturing Co., Ltd. (Murata Manufacturing) was founded in 1944 and is headquartered in Nagaokakyo, Japan. Murata Manufacturing designs, manufactures, and sells ceramic-based passive electronic components and solutions globally. The company operates through components, modules, and others segments, serving communications, mobility, industrial, healthcare, and personal electronics customers. They company's product offerings include noise suppression products, quartz devices,RFID devices, phase shifters, and wireless connectivity platforms. Services such as webinars and video library are also available for existing and potential customers alike.
Elektronické součástky CZ, established in 1992 and headquartered in Ostrava, Czech Republic, is a manufacturer of electronic and electromechanical components. Its offerings encompass resistors for power supplies and audio systems, capacitors for filters and oscillators, inductors for energy storage, integrated circuits (ICs) for diverse electronic devices, and light-emitting diodes (LEDs) for lighting applications. These solutions find utility in automotive, telecommunications, manufacturing, medical, and consumer electronics industries. Its electronic components conform to international standards like IEC, CECC, and EN, ensuring uniform quality. These components possess IECEE-CB certificates for worldwide applications, with production certified under ISO 9000 standards.
Song-Huei Electric Co. Ltd. is a variable resistor manufacturer established in 1981 and based in Kaohsiung, Taiwan. In 2002, the company initiated a technological cooperation with Tokyo Ko-On Denpa Co., Ltd., resulting in its role as the original equipment manufacturer (OEM) for various Tokyo Ko-On Denpa products such as DJVR, fader, and voice-controlled potentiometers. Its Nano technology allows the fader's lifespan to exceed 1,000,000 cycles. The company is certified with ISO-9000 standard and has established its facility in Guang Dong Province, South China, under the name of San Fa Electronic Co., Ltd.
TE Connectivity Ltd., started in 2007 and headquartered in Schaffhausen, Switzerland, is a designer and manufacturer of sensor and connectivity solutions for harsh conditions. It operates three primary segments, namely transport, industrial, and communication solutions, and its product portfolio includes automotive connectors, fiber optic connectors, analog power meters, RTD sensors, and circuit breakers. It serves customers in approximately 140 countries and several industries, including aerospace, automotive, rail, IoT connectivity, and E-mobility. The company manufactures 192 billion products annually and has invested over 610 million USD in research development and engineering.
Kingtronics International Company was established in 1990 in Hong Kong and has several factories across China manufacturing electronic components such as bridge rectifiers. The company is ISO 9001:2015 certified and works with several distributors around the world including KORE, Prod. El, DTDS, and others. The company produces two kinds of electronics components: passive components such as aluminum electrolytic capacitors including radial type and axial type, and active components such as diodes, transistors, and bridge rectifiers.
NIDEC COPAL ELECTRONICS was established in Japan in April, 1967 as a specialty manufacturer of electronic components. NIDEC’s offerings have increased to serve the automotive, construction, medical equipment, FA equipment, analytical measuring equipment, and residential security industries. Among the offerings are components for LiDAR, railway pressure sensors, CPAP, dialysis, MRI, and ultrasonography machines, wireless base stations, and power tools. These components include switches, sensors, mirrors, motors, and fans.
Hybrid Electronics is a global distribution specialist of electronic components, with access to over 50 million unique components. Among the markets HE serves are the aerospace, automotive, communications, defense, industrial, medical, national security, and test & measurement industries. In addition to components, HE also provides quality and compliance testing, counterfeit detection, upscreening, and other forms of quality control. Examples of component subtypes that HE offers include ICs, batteries, capacitors, semiconductor products, sensors, circuit protection, interconnectors, filters, optoelectronics, relays, switches, power supplies, and cables and cable assemblies.
Ranking as of April 2026
Derivation Method| Rank | Company | Click Share |
|---|---|---|
| 1 | VTRONS TECHNOLOGY CO.,LIMITED |
10.5%
|
| 2 | Song Huei Electric Co., Ltd. |
8.5%
|
| 3 | KLS Electronic |
7.2%
|
| 4 | Chengdu Mengsheng Electronic Co.,Ltd |
6.5%
|
| 5 | Sichuan Qixing Electronics Co., Ltd. |
6.5%
|
| 6 | Elektronicke soucastky CZ |
6.5%
|
| 7 | Suntan Capacitors |
5.9%
|
| 8 | Semec Technology Company Limited |
5.9%
|
| 9 | TAIWAN PWL CORPORATION |
5.2%
|
| 10 | Ohmite |
5.2%
|
Derivation Method
The ranking is calculated based on the click share within the trimmer potentiometer page as of April 2026. 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 (%) |
|---|---|---|
|
Japan
|
5 | 35.7% |
|
United States of America
|
4 | 28.6% |
|
China
|
2 | 14.3% |
|
Czech Republic
|
1 | 7.1% |
|
Taiwan
|
1 | 7.1% |
|
Hong Kong
|
1 | 7.1% |
226 products found - Page 2
226 products - Page 2
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■Features Safety sockets have a structure that prevents electric shocks and short circuits with no exposed metal parts.
