![[UNIFIVE] AC/DC Power Adapter & Switching Power Supply Manufacturer](common/img/header-logo.svg){kind=logo}
Commitment to Quality
As a manufacturer of AC/DC Power Adapter and switching power supplies, we have established a comprehensive quality assurance system covering every stage, from incoming parts 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 approach is based on the principles of quality control defined in JIS Z 8101 (Quality Control Terminology). Quality control is a systematic means of economically producing Products that meet customer requirements, and it requires the participation and cooperation of everyone at every level of corporate activity, including executives, managers, supervisors, and workers. Based on this concept of Total Quality Control (TQC), we have established a system that builds quality into every stage of the design, procurement, manufacturing, inspection, and shipping processes.
All employees strive to improve their technical capabilities while continuously evaluating and improving each process. Rather than pursuing short-term cost reductions, we prioritize quality decisions that foster long-term trust. The foundation of our quality policy is to deliver Products that customers can adopt with confidence.
Certifications and Safety Standards
 ISO 9001:2015 Certificate |  ISO 14001:2015 Certificate |
| Certification/Standard | Details |
|---|---|
| ISO 9001:2015 | Quality Management System Certification (Certification Body: CQC) |
| ISO 14001:2015 | Environmental Management System Certification |
| Safety Standards and Factory Certifications | Certified to safety standards in various countries, including Japan's PSE, UL/CUL, TUV, EK-MARK, CCC, and BSMI, with factory certifications obtained |
Quality Control System
Our design, manufacturing, quality assurance, and management departments work together to manage quality throughout every process. The following pages provide detailed information on our specific management methods, inspection systems, and improvement processes, including our traceability system, which retains historical data for all Products for 20 years.
 | Quality Control System for Our AC/DC Power Adapter This page explains independent design verification by our QA department, manufacturing control based on process FMEA, and controls throughout the process from incoming inspection to shipment inspection. |
 | Details of our management system, which enables tracking down to the production lot, components used, and manufacturing process. This page introduces our system for retaining historical data for all Products for 20 years and immediately identifying the cause in the unlikely event of a quality issue. |
 | Product Design and Quality Verification This page describes the verification process used to build quality into products from the design stage. It explains the workflow for prototype evaluation, safety standard compliance verification, and approval for transition to mass production. |
Component and Material Management
AC/DC Power Adapter and switching power supplies depend heavily on the quality of the components and materials used. See below for details on each topic, from supplier selection criteria to chemical substance management.
 | Component Supplier Selection Process This section explains the criteria for selecting suppliers based on a comprehensive evaluation of quality, cost, and supply stability, as well as how to build reliable partnerships. |
 | This section explains specific methods for managing chemical substances in accordance with the RoHS Directive and REACH Regulation, including the incoming inspection system for all purchased components using X-ray fluorescence analyzers. |
 | Measures Against Red Phosphorus (Ion Migration) This section covers the management of DC plugs to ensure they do not contain red phosphorus flame retardants. It explains the management standards in place since 2016 and the manufacturer oversight system used to prevent silent changes. |
Manufacturing Process Control
To ensure quality during manufacturing, we have established control standards, inspection methods, and testing systems for each process. The following pages introduce our specific initiatives.
 | This page explains the details and implementation systems for various reliability tests designed to simulate customers' operating environments, including temperature cycling, vibration, drop, and accelerated life testing. |
 | Methods for Controlling the Ultrasonic Welding Process for Enclosures This page explains how welding conditions are set and controlled, and how quality is inspected, in the ultrasonic welding process used to assemble AC/DC power adapter enclosures. |
Compliance with Safety Standards
AC/DC Power Adapter and switching power supplies must comply with the safety standards of each country before they can be placed on the market. We have extensive experience in complying with safety standards worldwide, including Japan's PSE standards.
 | About Japan's Electrical Appliance and Material Safety Act (PSE) This page provides an overview of Japan's Electrical Appliance and Material Safety Act (PSE), which must be complied with to sell AC/DC Power Adapter in the Japanese market, as well as an explanation of our compliance framework. |
 | Compliance with Global Safety Standards This page explains our experience and certification framework for complying with safety standards worldwide, including PSE, UL/CUL, TUV, CE, CCC, and BSMI. We support the acquisition of safety certifications appropriate for the countries and regions where our customers' Products will be shipped, starting from the design stage. |
Customer Recognition
As a result of the quality initiatives introduced on this page, we have received high praise from our business partners for our supplier quality and management systems. Below are some of the awards 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. We have built a long-standing relationship of trust, receiving a certificate of appreciation in 2021 to commemorate Mitsubishi Electric's 100th anniversary and an Outstanding Supplier Award for FY2023.
Outstanding Supplier Awards (2024 and FY2023)
 Outstanding Supplier Award Trophy (2023) |  Certificate of Commendation (2024) |
Certificate of Appreciation for the 100th Anniversary (2021) / Certificate of Commendation (2009)
 Certificate of Appreciation for the 100th Anniversary (2021) |  Certificate of Commendation (2009) |
Brother Industries Group
We have consistently received high ratings from the Brother Industries Group in its QCDE (Quality, Cost, Delivery, and Environment) evaluation activities. Our achievements include receiving the Quality Award in FY2017 and the Special Award in FY2018, as well as being certified as a Class A supplier and successfully qualifying for certification of our chemical substance management system.
QCDE Evaluation Activities Quality Award (FY2017)
 Quality Award Trophy |  Quality Award Certificate |
QCDE Evaluation Activities Special Award (FY2018)
 Special Award Trophy |  Special Award Certificate |
Class A Supplier Certification (FY2013 and FY2014)
 Class A Supplier Certification (FY2013) |  Class A Supplier Certification (FY2014) |
Certificate of Compliance for the Chemical Substance Management System (2020)
 Certificate of Compliance for the Chemical Substance Management System (2020) | This certificate verifies that our chemical substance management system complies with the Brother Industries Group's audit standards. Our chemical substance management throughout the supply chain, including compliance with the RoHS Directive and REACH Regulation, has been evaluated. |
Recognition from Industry Organizations and Partners
In addition to recognition from our customers, our initiatives have also been recognized by safety standards certification bodies and business partners.
 Japan Electrical Safety & Environment Technology Laboratories (JET) |  Willas-Array Electronics (Holdings) Limited |
Related Pages
Please also visit the following pages to learn about our approach to quality and our commitment to social responsibility.