What Is the UL 62368-1:2025 Test Report?

Approved by the American National Standards Institute (ANSI), ul 62368-1:2025 “Audio/Video, Information and Communication Technology Equipment – Part 1: Safety Requirements” (Fourth Edition)was officially published and adopted as a U.S. National Standard on JULy 31, 2025.

This standard corresponds to the International Standard IEC 62368-1:2023 (Fourth Edition)and the European Standard EN IEC 62368-1:2024 (Fourth Edition). It marks a comprehensive upgrade of the U.S. safety regulatory system for Audio/Video and Information & Communication Technology (AV/ICT)equipment.

Standard Upgrade

UL 62368-1:2025 is based on IEC 62368-1:2023 (4th Edition)and shifts its core approach from “product category-based regulation”to “energy source risk-based control.”

The standard classifies energy sources into three levels:

- ES1 (Energy Source Class 1):Safe to touch (e.g., output voltage ≤ 60V DC, current ≤ 8A); user contact is permitted.

- ES2 (Energy Source Class 2):Perceptible but not hazardous (e.g., 75V DC); additional protective measures requiRED.

- ES3 (Energy Source Class 3):High-risk energy sources (exceeding ES2 limits); must be isolated or physically enclosed to prevent contact.

Major Technical Updates

### 1. Component Certification Requirements

Components certified under legacy standards iec 60950-1(IT equipment) or IEC 60065(audio/video equipment) are no longer accepted.

Manufacturers relying on legacy-certified components must immediately review their BOM lists, as many parts will require re-certification or replacement.

### 2. Button Battery Safety

Updated the structural requirements for button batteries, adding compliance with UL 4200a(standard for products containing button/coin cell batteries).

### 3. Power Output Parameters

Revised tables for external circuit requirements, aligned classifications with IEC TR 62102, and updated overvoltage limits for different circuit categories.

### 4. Mechanical Structure Requirements

Updated flame enclosure openingrequirements, particularly the side opening size specifications.

### 5. Wireless Charging Foreign Object Test

Refined test methods for wireless charging foreign objects.

Now includes:

- Part A:Apply power first, then place foreign objects.

- Part B:Place foreign objects first, then apply power.

Also specifies coil alignment requirements before testing.

### 6. Resistor Safety Protection

Added that fuse resistors used for safety protectionmust comply with IEC 60127-8.

### 7. Liquid Cooling Component Requirements

Introduced new requirements for liquid cooling systems exceeding 1L capacity, including leak detection, fluid compatibility, and pressure relief.

Applicable to AI serversand high-performance computing devices.

### 8. Battery System Requirements

Significantly updated requirements for rechargeable lithium batteries.

Added mandatory provisions for stationary lithium battery systems, covering data center backup powerand large-scale energy storage.

Introduced segmental testingfor batteries with multi-section parameters.

### 9. Mesh/Grill Structure Equipment Requirements

For devices with mesh, grille, breathable materials, or foam/fabric-covered surfaces, new fire propagation testsare required for external heat sources.

Scope of Impact

UL 62368-1:2025 applies to all electronic devices powered by the grid or by batteries, including but not limited to:

- Computers and Peripherals:Laptops, servers, routers, UPS systems

- Consumer Electronics:Bluetooth earphones, smart speakers, digital cameras, drones

- Display Devices:LCD TVs, LED displays, projectors

- Communication Equipment:5G base stations, fiber terminals, in-vehicle communication modules

- Industrial Equipment:Medical monitors, industrial robot control units, AI servers

Data Alert

According to the U.S. Consumer Product Safety Commission (CPSC), in 2024, 83%of recalled Chinese-made products related to electrical safety issues were directly associated with missing or expired certifications.

The average loss per companywas approximately USD 2.2 million.