Our Expertise

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“Creating” electrical contacts

Where there are electric switches, there are always electrical contacts.

Electricity is necessary for our daily life.
There are many different types of electromagnetic switches, each for carrying and cutting off different electrical capacities.
As well as manufacturing contact configurations tailored to the individual needs of our customers, we have pioneered the development of contact materials for use with all types of electricity.
Selecting materials to meet our customer's criteria, we then develop and produce our products – creating products together with our customers is our company mission.
We have been in business as a specialist maker of electrical contacts for over 70 years and, pursuing our mission, we have built up a customer base from a wide range of industry sectors both in Japan and overseas.

As we face challenges of environmental issues, energy saving and increasing prices for scarce materials, supporting our customer's business through creating ever more innovative products remains our priority.

New technology

Rivet contacts

Various configurations are available now!


  • From solid types to triple layered types (PWBT)
  • Three material combination layered contacts
  • Extra thick chip contacts
  • Extra thin chip contacts
  • Solid head part with copper bottom

Please contact us for further information.


Bit staking

From wire staking to bit staking.


  • Bit staking is ideal for customers who undertake the staking process themselves instead of using rivet contacts. It removes the need for our customers to use silver and significantly reduces costs.

Please contact us for further information.


Stability and reliability of contact resistance

Since the diversification of the role of electrical contacts, seeking ways to reduce contact resistance has been of key importance across a number of industry sectors.

The following are our projects to reduce contact resistance and make electricity stable.

  • Reviewing molds and tools when producing contacts.
  • Improving cleaning processes
  • Adding contact resistance reduction process.

Examples of improvement

Examples of improvement

Please contact us for further information.


Value analysis for costdown

Reducing the cost of electrical contacts is a universal industry theme.

With the price of noble metals ever increasing, it has become important for us to reduce the amount of silver used in contacts which in turn allows us to pass on a reduction in cost to our customers.

Approach 1 Reducing silver

  • Solid contacts (rivet or wire) are generally used however, do contacts always need to be solid types?
  • To maintain the strength of bonded parts of contacts, have there been limitations due to the thickness of chips?
  • Is it possible to change the shape of contacts from what is currently used? (i.e.; from square to trapezium)
  • Is it possible to increase the use of composite materials instead of pure silver to reduce cost?

Approach 2 Stop the use of Gold / Silver Plating

  • Is it possible to improve contact resistance without using Au and Ag plates?

Approach 3 Assembly to reduce cost

  • Is it possible for us to undertake processes which customers would otherwise outsource to a third party company or do themselves?

These are just a few of our ideas!

Please contact us for further information.


Au・Ag plate

We specialize in the use of Au and Ag contact plates.

We use specialized techniques for using Au and Ag plates, in particular with rivet contacts.

  • Improved scratch resistance of contact surfaces with use of plates.
  • Plate layer remains stable after staking (reduced difference in contact resistance before and after staking).
  • Reduced cost for customers as we undertake the plating process.

Examples of improvement

Examples of improvement

Please contact us for further information.


Approach to recycling

We have improved our refining business!

Silver is an essential material for making contacts and is a precious natural resource. With prices ever increasing, at Chugai Electric Industrial Co., Ltd, we refine used silver in-house.

We collect scrap contacts from our customers and, after refining we calculate a refined silver price (based on our calculation standard) and pay this back to our customers.

We refine silver of 99.99% purity in-house and, after analyzing, we recycle the material for use in new contacts.

Please contact us for further information.


Approach to quality and environment

We have the flexibility to meet the ever evolving needs of our customers whilst prioritizing product quality and environmental welfare.
Our goal is to continuously produce perfect products to meet our customer's requirements through our approach to achieving ongoing improvement

About product quality

ISO 9001 JET-0030

Certified organization Chugai Electric Industrial Co., Ltd Kanagawa factory
Certificate number JET-0030
Applicable standard JIS Q 9001: 2015 (ISO 9001 :2015)
Certification authority Japan Electrical Safety & Environment Technology Laboratories

Quality Policy

  1. Product quality is our top priority and we achieve this in compliance with industry regulations to meet the demands of our customers both in Japan and worldwide. We will continue to make improvements in our systems in order to further improve our products.
  2. We are aiming towards another of our goals of “never allowing the same failure twice” with the aim of completely eliminating individual failures.

About environment

ISO 14001 E06-542

Certified organization Chugai Electric Industrial Co., Ltd Kanagawa factory
Certificate number E06-542
Applicable standard JIS Q 14001: 2015 (ISO 14001 :2015)
Certification authority Japan Electrical Safety & Environment Technology Laboratories

Environment Policy

As a specialized maker of electrical contacts, Chugai Electric Industrial Co., Ltd Kanagawa factory provides quality products which meet our individual customer's requirements. We also take our social and environmental responsibilities very seriously, making ongoing improvements to the way we work to contribute towards reducing the burden on our environment.

  1. We comply with both environmental protection regulations and local requirements which we have agreed to protect the area surrounding our factories.
  2. We set environmental policy goals and continue to strive to achieve them. We also occasionally revise our goals to try and improve further our environmental management and to prevent pollution.
  3. Our approach to environmental protection includes the following:
    1. ①Properly handling materials with the potential to cause harm to the environment.
    2. ②Saving natural resources and energy.
    3. ③Reducing waste
    4. ④Managing chemical materials properly.
  4. This policy is shared with and followed by every employee at our factories and we train our staff to understand these goals to help us achieve our aim.
  5. This policy is also shared in the public domain and is available for anyone to read.

ISO/IATF 16949 0313247

Certified organization CHUGAI (MALAYSIA) SDN. BHD.
Certificate number 0313247
Applicable standard ISO 9001:2015, ISO 14001:2015, ISO/IATF 16949:2016
Certification authority SIRIM QAS lnternational Sdn. Bhd.(Co. No. 410334-x)

Quality Policy

Chugai group quality policy statement responds to International Standards of ISO 9001:2015, ISO 14001:2015, ISO/IATF 16949:2016 and at the same time, we maintain the related laws & regulations and satisfy the expectation of all the stake holders’ in-line with our mission. Leveraging on the (Certifications) and supported by state-of-the-Art manufacturing facilities, we believe in manufacturing and quality philosophy of process orientation and improvements through Best Manufacturing Procedures, 5S, SPC and 7 QC TOOLS. Chugai group are committed to deliver on the basis of an effective quality system the best products and customer satisfaction that exceed our customers’ requirements and expectations.

  1. Customer satisfaction as our top priority
  2. Manufacture quality product at minimal cost
  3. Seeking continuous we do
  4. Building improvement staff development