Commitment to Quality

As a manufacturer of AC/DC Power Adapter and switching power supplies, we have established a quality assurance system covering all processes, from incoming inspection of components to design verification, manufacturing process control, reliability testing, and post-shipment traceability. This page introduces the specific control methods and quality standards at each stage.

Quality Policy

Our company is based on the concept of quality control as defined in JIS Z 8101 (Quality Control Terminology). Quality control is a systematic set of methods for economically producing Products that meet buyer requirements, and it requires the participation and cooperation of everyone involved in corporate activities, including executives, managers, supervisors, and workers, at every stage. Based on this company-wide quality control (TQC) philosophy, we have established a system that builds quality into every process, including design, procurement, manufacturing, inspection, and shipment.

All employees strive to improve their technical capabilities while continuously evaluating and improving each process. Rather than prioritizing short-term cost reductions, we place emphasis on quality decisions that lead to long-term trust, and delivering Products that customers can adopt with confidence is the foundation of our quality policy.

Certifications and Safety Standards

ISO 9001:2015 Certificate

ISO 14001:2015 Certificate

Quality Management System

Our design, manufacturing, quality assurance, and management departments work together to manage quality throughout all processes. Including a traceability system that stores the history data of all Products for 20 years, we provide detailed information on specific management methods, inspection systems, and improvement processes on the pages below.

Quality Management System for Our AC/DC Power Adapter This page explains third-party design verification by the QA department, manufacturing management based on process FMEA, and management methods covering all stages from incoming inspection to final shipment inspection.

Traceability Details of our management system that enables traceability down to manufacturing lots, used components, and production processes. We store the history data of all Products for 20 years, allowing us to immediately identify the cause in the unlikely event of a quality issue.

Products Design and Quality Verification An explanation of the verification process for building quality into the product from the design stage. It covers prototype evaluation, confirmation of compliance with safety standards, and the process for mass production approval.

Management of Components and Materials

AC/DC Power Adapter and switching power supply quality is greatly influenced by the quality of the components and materials used. Please see below for details on each topic, from supplier selection criteria to chemical substance management.

How to Select Component Suppliers This section explains the criteria for selecting suppliers by comprehensively evaluating quality, cost, and supply stability, as well as how to build reliable cooperative relationships.

RoHS2 Compliance Specific methods for managing chemical substances in accordance with the RoHS Directive and REACH Regulation. It also explains the incoming inspection system for all purchased components using X-ray fluorescence analyzers.

Measures Against Red Phosphorus (Ion Migration) Non-inclusion management of red phosphorus flame retardants in DC plug sections. It explains the management standards continuously implemented since 2016 and the manufacturer control system to prevent silent changes.

Management of the Manufacturing Process

To ensure quality during the manufacturing stage, we have established control standards, inspection methods, and testing systems for each process. The following pages introduce our specific initiatives.

About Reliability Testing We explain the details and implementation framework of various reliability tests that simulate customer usage environments, including temperature cycle tests, vibration tests, drop tests, and accelerated life tests.

Management Methods for the Ultrasonic Welding Process of Enclosures AC/DC Power AdapterWe explain the methods for setting and managing welding conditions and the quality inspection system in the ultrasonic welding process used for assembling enclosures.

Compliance with Safety Standards

AC/DC Power Adapter and switching power supplies cannot be supplied to the market unless they comply with the safety standards of each country. We have a proven track record of compliance with safety standards worldwide, including Japan's PSE.

About the Electrical Appliance and Material Safety Act (PSE) This section explains an overview of the Electrical Appliance and Material Safety Act (PSE), which is required to sell AC/DC Power Adapter in the Japanese market, as well as our compliance system.

Compliance with Global Safety Standards We explain our track record and certification system for compliance with global safety standards such as PSE, UL/CUL, TUV, CE, CCC, and BSMI. We support the acquisition of required safety certifications from the design stage according to the countries and regions where our customers' Products are shipped.

Customer Evaluations

As a result of our quality initiatives introduced on this page, we have received high evaluations from our business partners regarding our supplier quality and management systems. Below are some of the commendations and certificates we have received from our customers.

Mitsubishi Electric Corporation

We have received multiple awards from Mitsubishi Electric Corporation in recognition of our contributions to its business. In 2021, we were presented with a letter of appreciation on the occasion of the company’s 100th anniversary, and in FY2023 we received the Excellent Supplier Award, building a long-standing relationship of trust.

Excellent Supplier Award (2024, FY2023)

Excellent Supplier Award Trophy (2023)

Certificate of Appreciation (2024)

100th Anniversary Letter of Appreciation (2021) / Certificate of Appreciation (2009)

100th Anniversary Letter of Appreciation (2021)

Certificate of Appreciation (2009)

Brother Industries Group

The Brother Industries Group has continuously given us high evaluations in its QCDE (Quality, Cost, Delivery, Environment) assessment activities. Beginning with the Quality Award in fiscal year 2017 and the Special Award in fiscal year 2018, we have also obtained A-Rank Supplier certification and certification of compliance for our chemical substances management system.

QCDE Assessment Activities Quality Award (FY2017)

Quality Award Trophy

Quality Award Certificate

QCDE Evaluation Activity Special Award (FY2018)

Special Award Trophy

Special Award Certificate

A-Class Supplier Certification (FY2013, FY2014)

A-Class Supplier Certification (FY2013)

A-Class Supplier Certification (FY2014)

Certificate of Approval for Chemical Substance Management System (2020)

Certificate of Approval for Chemical Substance Management System (2020) Passed regular audit by Brother Industries, Ltd.

This certificate verifies that our chemical substance management system complies with the audit standards of the Brother Industries Group. Our management of chemical substances throughout the entire supply chain, including compliance with the RoHS Directive and REACH Regulation, has been evaluated.

Recognition from Industry Organizations and Partners

In addition to feedback from our customers, we have also received recognition from safety standards certification organizations and business partners for our initiatives.

General Incorporated Foundation Japan Electrical Safety & Environment Technology Laboratories (JET) Letter of Appreciation (2016)

Willas-Array Electronics (Holdings) Limited 30th Anniversary Long-Term Partnership Commemorative Plaque

Related Pages

For our approach to quality and initiatives toward social responsibility, please also see the following pages.

• Initiatives as a Power Supply Manufacturer
• Initiatives for Social Responsibility (CSR)