Tuning capacitors may have their capacitance changed by mechanical motion. Generally two versions has to be distinguished
Variable capacitor ? variable capacitor for intentionally and repeatedly tuning an oscillator circuit in a radio or another tuned circuit.
Trimmer capacitor ? small variable capacitor usually for one-time oscillator circuit internal adjustment
Variable capacitors include capacitors that use a mechanical construction to change the distance between the plates, or the amount of plate surface area which overlaps. They mostly use air as dielectric medium.
Trimmer capacitors are variable capacitors which serve the purpose of initial calibration of equipment during manufacturing or servicing. They are not intended for end-user interaction. Trimmer capacitors are mostly mounted directly on the PCB (Printed Circuit Board), so the user does not have access to them, and set during manufacturing using a small screwdriver. Due to their nature, trimmer capacitors are cheaper than full sized variable capacitors and rated for many fewer adjustments.
Trimmer capacitors are used to initially set oscillator frequency values, latencies, rise and fall times and other variables in a circuit. Should the values drift over time, these trimmer capacitors allow repairmen to re-calibrate equipment when needed. There are two types of trimmer capacitors- air trimmer capacitor and ceramic trimmer capacitor. These two types use different materials as the dielectric. Both types use rotating action to change the capacitance value. The construction of trimmer capacitors is similar to the construction of their larger variant, the variable capacitor. Trimmer capacitors can be made of semi-circular metal plates. One is fixed, while the other can be rotated using a screwdriver.

Murata, Vishay and Voltronics Corporation captured the top three revenue share spots in the Trimmers/Variable Capacitors market in 2015. Murata dominated with 53.62 percent revenue share, followed by Vishay with 10.89 percent revenue share and Voltronics Corporation with 7.81 percent revenue share.
Despite the presence of competition problems, due to the clear global recovery trend, investors are still optimistic about this area, in future still more new investment will enter into the field. Technology and cost are two major problems.
Although sales of Trimmers/Variable Capacitors brought a lot of opportunities, for the new entrants with only advantage in capital but without sufficient support in technology and downstream channels, the research group does not recommend taking risk of entering this market.

According to this study, over the next five years the Trimmers Variable Capacitors market will register a xx% CAGR in terms of revenue, the global market size will reach USD xx million by 2024, from USD xx million in 2019. In particular, this report presents the global market share (sales and revenue) of key companies in Trimmers Variable Capacitors business, shared in Chapter 3.

This report presents a comprehensive overview, market shares, and growth opportunities of Trimmers Variable Capacitors market by product type, application, key manufacturers and key regions and countries.

This study considers the Trimmers Variable Capacitors value and volume generated from the sales of the following segments-

Segmentation by product type- breakdown data from 2014 to 2019, in Section 2.3; and forecast to 2024 in section 11.7.
Air gap variable capacitors
Vacuum variable capacitors
SF6?gas filled variable capacitor
Air gap trimmer capacitors
Ceramic trimmer capacitors
Others
Segmentation by application- breakdown data from 2014 to 2019, in Section 2.4; and forecast to 2024 in section 11.8.
Electronic components
Medical devices
Communication equipment
Other Application

This report also splits the market by region- Breakdown data in Chapter 4, 5, 6, 7 and 8.
Americas
United States
Canada
Mexico
Brazil
APAC
China
Japan
Korea
Southeast Asia
India
Australia
Europe
Germany
France
UK
Italy
Russia
Spain
Middle East & Africa
Egypt
South Africa
Israel
Turkey
GCC Countries

The report also presents the market competition landscape and a corresponding detailed analysis of the major vendor/manufacturers in the market. The key manufacturers covered in this report- Breakdown data in in Chapter 3.
Vishay
Murata
Voltronics Corporation
Tusonix
COMET
Johanson
Sprague goodman
NEWCONT
Best
Fu Shan Electronics
NTSDDZ
Jennings

In addition, this report discusses the key drivers influencing market growth, opportunities, the challenges and the risks faced by key manufacturers and the market as a whole. It also analyzes key emerging trends and their impact on present and future development.

Research objectives
To study and analyze the global Trimmers Variable Capacitors consumption (value & volume) by key regions/countries, product type and application, history data from 2014 to 2018, and forecast to 2024.
To understand the structure of Trimmers Variable Capacitors market by identifying its various subsegments.
Focuses on the key global Trimmers Variable Capacitors manufacturers, to define, describe and analyze the sales volume, value, market share, market competition landscape, SWOT analysis and development plans in next few years.
To analyze the Trimmers Variable Capacitors with respect to individual growth trends, future prospects, and their contribution to the total market.
To share detailed information about the key factors influencing the growth of the market (growth potential, opportunities, drivers, industry-specific challenges and risks).
To project the consumption of Trimmers Variable Capacitors submarkets, with respect to key regions (along with their respective key countries).
To analyze competitive developments such as expansions, agreements, new product launches, and acquisitions in the market.
To strategically profile the key players and comprehensively analyze their growth strategies.