Thorough product design and quality verification

At Unifive, by establishing a comprehensive testing system, we prevent defects and extend the lifespan of AC/DC power adapters — desktop & wall-mount types — and switching power supply products, offering high quality and safety. Below, we introduce some of the key points of our design and quality verification process.

Finished Product Inspection

Exterior & Wiring Physical Tests: Ensuring Durability and Safety

Drop Test
Verifies whether the product can withstand shocks during handling or transportation. Checks for measures that prevent damage to the power unit casing and wiring.
Sharp Edge Drop Test
Ensures safety around product edges and protrusions to minimize the risk of injury or damage.
Cord Tension Test / Plug Insertion-Removal Test
Repetitive testing is conducted over time to assess cable durability and prevent connector wear or contact failure, ensuring long-term reliability.
Ball Pressure Test
Examines softening temperature of exterior resins to ensure shape retention and safety in both normal and high-temperature environments.

→Key Point
The durability of casings and cables significantly affects on-site reliability. We conduct a wide range of physical tests to ensure both stable operation and safety.

Chemical Tests: Balancing Environmental Impact and Product Resistance

Salt Spray Test
Tests the rust resistance and corrosion tolerance of metal parts to prevent degradation. Simulates usage under various environmental conditions including overseas and coastal areas.
Humidity Test
Verifies functionality in high-humidity conditions and identifies potential faults caused by moisture penetration into components and boards.
RoHS Compliance Test
Confirms compliance with environmental regulations such as the EU RoHS directive, promoting eco-friendly product development.

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From the design phase, we select materials with low environmental impact and high environmental resistance to ensure internationally compliant quality.

Reliability Tests: Commitment to Long-Term Stability

Operation Test
Assesses stability during continuous operation and under overload, establishing a foundation for long product life.
Vibration Separation Test / Thermal Shock Test
Ensures performance is maintained under intense vibrations and temperature fluctuations, such as those during transport or sudden environmental changes.
Aging Test
Detects time-dependent degradation and faults after prolonged use to optimize design and prevent long-term deterioration.
Insulation Resistance Test / Withstand Voltage Test
Strictly checks insulation performance to prevent leakage and short circuits, securing safety and high reliability.
Blanket Wrapping Test
Operates the product under rated load while wrapped in a blanket to check for deformation, smoke, or fire, comprehensively evaluating safety under overheating conditions.

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We simulate real-world environments extensively and implement layered verification to ensure long-term product stability and respond to overheating risks, aiming to reduce failure rates and enhance safety.

EMC Tests: Noise Suppression and Compliance with Safety Standards

Electrostatic Discharge (EFT), Surge (Lightning), and DIP Tests
Confirms resistance to external electrostatic discharge and lightning surges to prevent malfunctions or failures in control systems.
Noise Resistance Test (High-Frequency Noise Test)
Designs take into account safety not only for the device itself but also for surrounding circuits to minimize the impact on peripheral equipment.

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Noise-related issues in power supplies can result in corporate losses and complaints. We cover comprehensive EMC tests to deliver safe and compliant power supplies aligned with international standards.

Mechanical Tests: Comprehensive Evaluation of Impact and Usability

Single-Axis & Compound Vibration Tests
Simulates various vibrations during use and transport to protect mounting boards and internal wiring.
Case Property Verification / AC Pin Push Test
Assesses plug retention and case deformation resistance to achieve sturdy and user-friendly designs.
External Force Test / Drop Impact Test / Standalone Drop Test
Quantitatively evaluates the extent of damage from impacts to individual products, improving strength and safety.

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Robust structure and ease of use directly influence production efficiency. We conduct multi-faceted evaluations to achieve power supplies that are "long-lasting and hard to break."

Environmental Tests: Adapting to Harsh Temperature and Humidity Conditions

Thermal Shock Test / High-Temperature / Low-Temperature Operation Tests
Verifies sustained performance in extremely hot or cold conditions, supporting use in specialized applications such as freezers or high-heat environments.
High Temperature and Humidity Storage Test
Assesses whether a product maintains quality and performance after prolonged storage in specific environments.

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We test for temperature and humidity resistance across a range of usage environments to ensure safety and reliability in any situation.

Component Inspection

Validation at the Component Level: PCB / MOSFET / Diode / Transformer / Cable / Casing / Electrolytic Capacitor

We never neglect quality verification at the component level in addition to finished product testing.

PCB: Thermal Expansion Test, Measurement Test, RoHS Compliance, etc., ensuring board quality
MOSFET: EMI Test, Regulatory Testing, Heat Generation Measurement, etc., ensuring stable operation of high-speed switching components
Diode: EMI Test, Breakdown Test, Rectifying Ability Assessment, etc., enhancing reliability of rectifier circuits
Transformer: DCR Measurement, Winding Resistance Evaluation, Temperature Rise Test, etc., optimizing core component characteristics
Cable: Bending Test, Combustion Test, Tension Test, Salt Spray Test, Disassembly Inspection (Soldering), Contact Resistance Test, evaluating mechanical, chemical, and electrical characteristics
Casing: Combustion Test, Insulation Test, Ball Pressure Test, Iron Ball Drop Test, verifying compliance with safety standards
Electrolytic Capacitor: Withstand Voltage Rise Test, Capacitance Variation Test, Life Evaluation, Capacitance Loss Measurement, Terminal Pull Test, DC Drop Resistance Measurement, improving component life critical to power stability

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We believe "quality begins with components" and conduct meticulous testing not only on major parts but also down to the smallest details. By thoroughly managing individual component quality, we minimize failures and defects.

Summary: Benefits of Our Comprehensive Testing

High Product Reliability
We provide power supplies that operate stably in diverse usage environments such as drops, vibrations, and high-temperature/high-humidity conditions.
Safety and International Standard Compliance
Supports smooth acquisition of certifications through compatibility with standards like EMC and RoHS.
Extended Lifespan & Cost Reduction
Minimizing defects and failures reduces maintenance and replacement costs, lowering total life cycle costs.
Preventive Design Measures
By simulating and testing potential failure zones in advance, we enable stable product supply from the design stage by eliminating problems early.

We thoroughly test every key factor that affects power supply quality and comply with international standards. As a partner that enables faster product development and reduces the risk of defects, we hope you consider our power supplies.