About reliability testing

On this page, we introduce some of the reliability tests for AC/DC Power Adapter and switching power supplies. Based on the extensive expertise accumulated through experience as a switching power supply manufacturer, UNIFIVE supports a wide range of reliability tests. We also accommodate test conditions provided by customers and additional test items across a broad scope.

Overview of Reliability Testing

Reliability testing for AC/DC Power Adapter and switching power supplies is conducted to verify that the Products operates stably over a long period in the intended usage environment. Test items are broadly classified into two categories: "Electrical Reliability Testing" and "Mechanical Reliability Testing."

Category	Purpose
Electrical Reliability Testing	Verification of electrical characteristics, EMC, safety, and environmental resistance performance
Mechanical Reliability Testing	Verification of physical durability of the enclosure, cables, and plugs

Electrical Reliability Testing

In electrical reliability testing, products are evaluated from the perspectives of electrical characteristics, EMC (Electromagnetic Compatibility), safety, and environmental resistance performance. The main test items are as follows.

Electrical Characteristics and Environmental Resistance Tests

Test Item
Voltage Fluctuation Test
Low-Temperature and High-Temperature Operation Test
Low-Temperature and High-Temperature Storage Test
High-Temperature Powered Storage Test
Temperature Shock Test
Condensation Test
Continuous Operation Endurance Test
100°C 96H Storage Test
Liquid Drip Test

EMC and Noise-Related Tests

Test Items
Noise Terminal Voltage Test
Unwanted Radiation Test
Electrostatic Discharge (ESD) Test
Impulse Noise (EFT) Test
Lightning Surge Immunity Test
Power Interruption Test
Radiated Electromagnetic Field Immunity (EMI) Test
AM/FM Radio Interference Test
Noise Test

Safety Tests

Test Items
Temperature Rise Test
Abnormal Temperature Rise Test
Leakage Current Test
Dielectric Strength Test
Insulation Resistance Test
Residual Current Test
Primary-Side Electrolytic Capacitor Test
Overvoltage Test
Terminal Short-Circuit Test
Open/Short Test
Destruction Test in Intermediate State
Test for Out-of-Spec Voltage

Mechanical Reliability Testing

Mechanical reliability testing verifies the physical durability of each part of the AC/DC Power Adapter, including the enclosure, DC cable, and plug.

Enclosure Test Items

Test Item
Drop Test
Vibration Test
Rotational Impact Test
Enclosure Compression Test
AC Plug Single Blade Insertion Test
Step Strength Test
Dust Resistance Test
AC Plug Insertion and Withdrawal Test
Flame Retardancy Test

DC Cable Section Test Items

Test Item
Bending Strength Test
Low Temperature Bending Test
Tensile Strength Test
Twist Test
Migration Test
Internal Plug Processing Inspection

Plug Test Items

Test Item
Insertion and Withdrawal Durability Test
Lock Strength Test
Prying Test
Strength Test Under Mis-insertion

In-House Testing Facilities

Our company maintains in-house laboratory facilities capable of conducting tests such as conducted emissions, ESD (Electrostatic Discharge), EFT (Electrical Fast Transient), surge, and EMI (Electromagnetic Interference).

Support for Customer Test Requirements:In addition to the standard test items listed above, we also accommodate test conditions and items based on customer requirements. Please contact our sales department to discuss your testing needs.

For more details about our quality control system and manufacturing process management, please also see the following pages.

Our Commitment to Quality:
Our Commitment to Quality (Top Page) / Quality Control System for Our AC/DC Power Adapter / Management Methods for the Ultrasonic Welding Process of Enclosures / Products Design and Quality Verification