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This section provides an overview for leaf switches as well as their applications and principles. Also, please take a look at the list of 7 leaf switch manufacturers and their company rankings. Here are the top-ranked leaf switch companies as of April, 2025: 1.Shinmei Electric Co.,LTD., 2.UKB Electronics Pvt. Ltd., 3.wellnowus.
Table of Contents
Leaf switches are switches that conduct electricity by physically bringing two or three thin copper plates into contact with each other.
Like other types of switches, they have an ON-OFF or ON-ON function.
Some leaf switches have exposed contacts, while others are fitted with plastic covers. Both are simple in construction and have few parts, so if contact failure occurs, they can be restored with simple maintenance such as polishing the contacts and applying a contact revival agent.
Leaf switches are generally used to detect the position of the pickup body or motor of a CD player. Leaf switches with increased dust resistance and longer life are also used in pushbutton switches for elevators and other equipment.
When the pickup body moves to the end, it contacts the leaf switch and the contact turns ON. This controls the pickup body from moving any further when electricity flows through it. If the leaf switch has poor contact, it cannot detect that the pickup body has moved to the end, so it tries to move forcibly, which may cause a failure.
Leaf switches consist of two or three thin copper plates fixed to the base in a long protruding position. At the end of the copper plates is a contact point and on the other side is a terminal. The thin copper plates bend easily even with light force, and when the contact points come into contact with each other, electricity flows. By detecting this current on the circuit side, it is possible to detect the position of the desired object.
In the case of a leaf switch with two copper plates, the switch is OFF when they are far apart and ON when they are in contact with each other; in the case of a leaf switch with three plates, the central copper plate is originally in contact with one side, allowing the switch to flip where electricity flows.
Leaf switches have a simple construction in which electricity is conducted by the copper plates making contact, but over time the contacts can become worn and corroded. If the contacts remain corroded, electricity will not flow even if they are in contact, resulting in poor contact. As a countermeasure, gold, which is more corrosion-resistant than copper, is used in leaf switches that are used under severe conditions.
*Including some distributors, etc.
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wellnowus, founded in Yueqing, China, in 2004 is a manufacturer of electronic connectors. The company's product portfolio includes the Power Jacks Series, Phone Jacks Series, Switch Series, Pin Jack Series, and Network socket series. The company serves industries such as Oil and Gas, Aerospace and Defense, Automotive and Transportation, Construction, and Power Generation. The company's main markets are Southern Europe, Western Europe, North America, and South Asia and they have global distribution channels.
Shinmei Electric Co.,LTD. was established in 1958 and is a manufacturer and supplier of electronic components based in Kawasaki, Kanagawa, Japan. The company produces various electronic parts such as microswitch, solenoid, detection switch, tactile switch, and slide switch. The products have been applied in various usages such as office automation, home appliance, communication equipment, health equipment, and audio equipment. The company has obtained certificate of ISO 9001 and IATF 16949 standard certification.
UKB Electronics Pvt. Ltd. was established in 1996 in Noida, Uttar Pradesh, India, as a manufacturer and exporter of electronic products. The company provides various products, including UL wire, rubble cable and wire, VDE cable, and BIS cable, among others. The products are utilized for various applications, including indoor installation in surface-mounted or embedded conduits, building wires, power cords, and domestic electrical wiring, as well as for field foundation and bi-directional communications between field devices and control systems. The company serves various industries, including telecommunications, nuclear power, aerospace, renewable energy, mining, and medical.
Electronic Surplus, founded in 1946 and headquartered in Mentor, Ohio, United States, is a retail supplier of electronic components and parts. The company offers over 60,000 products, including capacitors, circuit breakers, and PC Card Edge Connectors. Its products are used by electronics professionals and hobbyists. It also purchases large quantities of surplus electronics components, including obsolete parts, discontinued products, and military parts. It also sources electronic components it doesn't currently have available. Its products are available for purchase in limited and large quantities via its online store.
Ranking as of April 2025
Derivation Method| Rank | Company | Click Share |
|---|---|---|
| 1 | Shinmei Electric Co.,LTD. |
28.1%
|
| 2 | UKB Electronics Pvt. Ltd. |
17.5%
|
| 3 | wellnowus |
17.5%
|
| 4 | See-Plus Industrial |
17.5%
|
| 5 | S.B.J ENTERPRISES |
8.8%
|
| 6 | Electronic Surplus |
7.0%
|
| 7 | Hyperscalers |
3.5%
|
Derivation Method
The ranking is calculated based on the click share within the leaf switch page as of April 2025. 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.
| Country | Number of Companies | Share (%) |
|---|---|---|
|
China
|
2 | 50.0% |
|
Japan
|
1 | 25.0% |
|
India
|
1 | 25.0% |
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