Series "PSE" Part 2 "About Electrical Appliances"
AC/DC Power Adapter and switching power supplies: What is "PSE"? This is the second installment in a series that explains it clearly once again.
An Updated Explanation of the Electrical Appliance and Material Safety Act and PSE
About Electrical Appliances Subject to PSE
Previously, we explained "What is PSE?"
In summary, "PSE" refers to product safety standards based on the Electrical Appliance and Material Safety Act, and it is an obligation imposed on manufacturers or importers to "prevent hazards and injuries caused by electrical appliances."
Please refer to the link below for the previous newsletter.
This time, we will explain the "electrical appliances" to which PSE applies.
The "electrical appliances" defined by the Electrical Appliance and Material Safety Act include "Specified Electrical Appliances" such as AC adapters = DC power supplies handled by our company, and "Non-Specified Electrical Appliances" such as televisions and air conditioners. A total of 457 items are designated: 116 specified items and 341 non-specified items.
Specified Electrical Appliances are those considered to have a high risk of danger depending on their structure or usage conditions, including: 1) products used for long periods without supervision, 2) products used by socially vulnerable individuals, and 3) products used in direct contact with the human body.
Please note that personal computers and printers are not treated as electrical appliances and are therefore not subject to regulation under the Electrical Appliance and Material Safety Act.

Concept of Electrical Appliances, reprinted from the Electrical Appliance and Material Safety Act Legal and Administrative Guide issued by the Ministry of Economy, Trade and Industry
Please note that the "electrical appliance name" under the Electrical Appliance and Material Safety Act does not necessarily match the commonly used "product name." The table below compares examples using AC adapters.
| Examples of Common Names | AC Adapter Charger Battery Charger, etc. | Plug Socket Conversion Adapter Base Conversion Adapter |
|---|---|---|
| Electrical Appliance Name | DC Power Supply | Adapter |
| Appearance |
| ![]() |
The table below summarizes the differences between Specified Electrical Appliances and Non-Specified Electrical Appliances.
Except for the items "Conformity Inspection" and "Confirmation of Certificate Validity Period and Confirmation of Validity Period of a Copy of an Equivalent Certificate," product safety verification is conducted under common requirements for both categories.
| Procedures under the Electrical Appliance and Material Safety Act (in the case of importers) | Specified Electrical Appliances | Non-Specified Electrical Appliances |
|---|---|---|
| Confirmation of Electrical Appliance Name and Model Classification | Required | Required |
| Business Notification | Required | Required |
| Obligation to Conform to Technical Standards | Required | Required |
| Conformity Inspection | Required | < Not Applicable > |
| Confirmation of Certificate Validity Period Confirmation of Validity Period of a Copy of an Equivalent Certificate | Required | < Not Applicable > |
| Voluntary Inspection | Required | Required |
| Labeling | Required | Required |
| Sales Restrictions | Required | Required |


If you would like to learn more about the differences between "Specified Electrical Appliances" and "Non-Specified Electrical Appliances," or about technical standards, please refer to the "Electrical Appliance and Material Safety Act Legal and Administrative Guide" published by the Ministry of Economy, Trade and Industry at the link below.
https://www.meti.go.jp/policy/consumer/seian/denan/file/06_guide/denan_guide_ver41.pdf
Next time, we will explain "Technical Standards."



