Connector UL Certification Test

JJR Laboratory in China is a UL TPTDP (Third Party Test Data Program) accredited laboratory for connector products. As an authorized partner laboratory of the China Quality Certification Center (CQC) and TUV, we provide one-stop bundled services for UL, TUV, and CQC certification of connectors. All UL, TUV, and CQC certification projects are tested and documented in our laboratory, enabling issuance of certificates after institutional review. 

Standards for Connector UL certification 

- Energy Storage Connectors: UL4128 

- Photovoltaic Connectors: UL6703 

- Photovoltaic Junction Boxes: UL3730 

- EV Charging Plugs: UL2251 

- Module Connectors: UL1977 

- Cable Assemblies: UL2238 

- Terminal Blocks: UL1059, UL60947-7-1 

- Wire Connectors: UL486A-486B, UL486E 

- Quick Electrical Terminals: UL310 

Key Test Items for Connector UL Certification 

UL4128 

1. Injection Stress-Release Test 

2. Conductor Integrity (Tensile) Test 

3. Current Cycling Test 

4. Temperature Rise Test 

5. Dielectric Withstanding Voltage Test 

6. Pulse High Voltage Test 

7. Rubber Pull Strength Test 

8. Accelerated Aging Test 

9. Low-Temperature Test 

10. Hardness Test 

UL6703 

1. Temperature Cycling Test 

2. Impact Test 

3. Tensile Test 

4. Accelerated Aging Test 

5. Voltage Withstanding Test 

6. Humidity Test 

7. Leakage Current Test 

8. Insulation Resistance Test 

9. Reverse Current Test 

10. Humidity-Freezing Test 

UL2251 

1. Automotive Shock and Vibration Test 

2. Pull-Out Strength Test 

3. Ground Path Current Test 

4. Short Circuit Test 

5. Load Durability Test 

6. Overload Test 

7. Temperature Rise Test 

8. Dielectric Strength Test 

9. Thermal Cycling Test 

10. Misalignment Test 

Our Advantages 

1. Professional Engineering Support: 

We offer expert guidance for unit division, structural evaluation, and factory inspection preparation, assisting factories in creating test samples. 

2. Comprehensive Pre-Testing: 

Our detailed pre-tests align with certification standards, ensuring your product passes UL, TUV, and CQC certification on the first attempt, saving significant retesting costs. 

3. Localized Testing: 

No need to ship products to the U.S.—all tests are conducted in our JJR Laboratory, ensuring full control over the process. 

4. On-Site Witness Testing: 

Companies can send technical personnel to witness the ul testing process on-site at our laboratory, facilitating seamless communication and mutual learning. 

5. Dedicated Engineer Support: 

Our experienced engineering team provides one-on-one service throughout the process, significantly increasing certification efficiency and success rates.