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 component inspection to design verification, manufacturing process control, reliability testing, and post-shipment traceability. This page introduces the specific control methods and quality standards applied at each stage.

Quality Policy

Our company is founded on the principles of quality control defined in JIS Z 8101 (Quality Control Terminology). Quality control is a systematic approach to economically producing Products that meet customer requirements, and it requires the participation and cooperation of everyone at every stage of corporate activities, including executives, managers, supervisors, and workers. 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 enhance their technical capabilities while continuously conducting evaluations and improvements at each process stage. Rather than prioritizing short-term cost reductions, we place greater importance on quality decisions that lead to long-term trust, and delivering Products that customers can adopt with confidence forms 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 closely together to control quality throughout all processes. Including a traceability system that stores the historical data of all Products for 20 years, we provide detailed explanations of our specific management methods, inspection systems, and improvement processes on the pages below.

Quality Management System for Our AC/DC Power Adapter An explanation of design verification from a third-party perspective by the QA department, manufacturing control 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 historical data for 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 to build quality in from the design stage, including prototype evaluation, confirmation of compliance with safety standards, and the decision-making process for mass production transition.

Management of Parts and Materials

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

How to Select Parts Suppliers 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. Explains the incoming inspection system for all purchased parts using X-ray fluorescence analyzers.

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

Manufacturing Process Control

To ensure quality during the manufacturing stage, we have established management 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 system of various reliability tests that simulate customer usage environments, such as temperature cycle tests, vibration tests, drop tests, and accelerated life tests.

Control Methods for the Ultrasonic Welding Process of Enclosures AC/DC Power AdapterWe explain the methods for setting and controlling 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 must comply with the safety standards of each country in order to be supplied to the market. We have extensive experience in complying 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 framework.

Compliance with Global Safety Standards We explain our track record and certification framework for complying with global safety standards such as PSE, UL/CUL, TUV, CE, CCC, and BSMI. We support the acquisition of the required safety standards from the design stage according to the country or region where your Products will be shipped.

Customer Evaluations

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

Mitsubishi Electric Corporation

We have received multiple awards from Mitsubishi Electric Corporation in recognition of our contributions to their business. In 2021, we were presented with a letter of appreciation on the occasion of Mitsubishi Electric's 100th anniversary, and in fiscal year 2023, we received the Excellent Supplier Award, building a long-term relationship of trust.

Excellent Supplier Award (2024, FY2023)

Excellent Supplier Award Trophy (2023)

Certificate of Appreciation (2024)

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

100th Anniversary Letter of Appreciation (2021)

Certificate of Appreciation (2009)

Brother Industries Group

We have continuously received high evaluations from Brother Industries Group in their 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 for our chemical substance management system.

QCDE Assessment Activity Quality Award (FY2017)

Quality Award Trophy

Quality Award Certificate

QCDE Evaluation Activities Special Award (FY2018)

Special Award Trophy

Special Award Certificate

Grade A Supplier Certification (FY2013, FY2014)

Grade A Supplier Certification (FY2013)

Grade A Supplier Certification (FY2014)

Certificate of Compliance for Chemical Substance Management System (2020)

Certificate of Compliance 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 across the entire supply chain, including compliance with the RoHS Directive and REACH Regulation, has been evaluated and approved.

Recognition from Industry Organizations and Partners

In addition to recognition from our customers, our initiatives have also been acknowledged by safety certification bodies and business partners.

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 more information about our approach to quality and our initiatives toward social responsibility, please also visit the following pages.

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