About Reliability Testing

This page introduces some of the reliability tests conducted on AC/DC Power Adapter and switching power supplies. Drawing on the expertise accumulated through extensive experience as a switching power supply manufacturer, UNIFIVE supports a variety of reliability tests. We can also accommodate customer-specified test conditions and add a wide range of test items.

Overview of Reliability Testing

Reliability testing for AC/DC Power Adapter and switching power supplies verifies that Products will continue to operate stably over an extended period in their intended operating environments. 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
Mechanical Reliability Testing	Verification of the physical durability of enclosures, cables, and plugs

Electrical Reliability Testing

Electrical reliability testing evaluates Products in terms of electrical characteristics, EMC (electromagnetic compatibility), safety, and environmental resistance. The main test items are listed below.

Electrical Characteristics and Environmental Resistance Testing

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

EMC and Noise-Related Tests

Test Item
Conducted Emissions Test
Radiated Emissions Test
Electrostatic Discharge (ESD) Test
Electrical Fast Transient (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 Item
Temperature Rise Test
Abnormal Temperature Rise Test
Leakage Current Test
Dielectric Withstand Voltage Test
Insulation Resistance Test
Residual Current Test
Primary-Side Electrolytic Capacitor Test
Overvoltage Test
Terminal Short-Circuit Test
Open-Circuit and Short-Circuit Test
Destructive Test in an Intermediate State
Out-of-Specification Voltage Test

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
Tread Strength Test
Sand and Dust Resistance Test
AC Plug Insertion and Withdrawal Test
Flame Resistance Test

DC Cable Test Items

Test Item
Flexural Strength Test
Low-Temperature Flexing Test
Tensile Strength Test
Pry Test
Migration Test
Plug Internal Assembly Inspection

Plug Section Test Items

Test Item
Insertion and Withdrawal Durability Test
Lock Strength Test
Prying Test
Incorrect Insertion Strength Test

In-House Testing Facilities

Our in-house laboratory is equipped to perform testing for conducted emissions, ESD (electrostatic discharge), EFT (electrical fast transients), surges, EMI (electromagnetic interference), and more.

Support for Customer-Specified Test Conditions:In addition to the standard test items listed above, we can also conduct tests under conditions and for items specified by customers. Please contact our sales team to discuss your testing requirements.

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

Quality Initiatives:
Quality Initiatives (Main Page) / Quality Control System for Our AC/DC Power Adapter / Management of the Ultrasonic Welding Process for Enclosures / Product Design and Quality Verification