USB Characteristic:
| Serial No. | Parameter | Description |
| 1 | Panel Material | PC 94-V0 |
| 2 | Inside material | Tin phosphorous bronze |
| 3 | Surface finish | Glossy |
| 4 | USB DC output | 4.2A/5V |
| 5 | Output voltage tolerance | ±5% |
| 6 | Output power | Max.21W |
| 7 | Service life in hours | 3000h 21W |
| 8 | Efficiency | 78% |
| 9 | No-load power consumption | Max 0.2W |
| 10 | Input voltage | 100~240v/AC 50~60Hz |
| 11 | Color | White RAL9003 Black |
| 12 | Number of terminals | 2 screw terminals |
| 13 | Electrical insulation class | Class II |
| 14 | IK degree of protection | IK04 |
| 15 | IP degree of protection | IP21 |
| 16 | Dimension of product | 45*45mm |
Environmental requirements
| Serial No. | Parameter | Description |
| 1 | Operating temperature | -10℃~+40℃;Operating |
| 2 | humidity | 20%~90% RH |
| 3 | Storage temperature | -20℃~+85℃;storage |
| 4 | humidity | 10%~95% RH |
| 5 | Resistance to pressure | ≥3Kv/AC 1min |
| 6 | Isolation resistance | 500v DC/100MΩ |
1).Dual port USB charger of 4.2A 5VDC;
2). Protection type: Short time short-circuit protection;
3).With identifying chip: can automatically recognize different mobiles and suit its request charging AMP to meet the charging speed;
4) Product be certificated by CE,IEC60950 FOR LVD and IEC55024,IEC61000 for EMC;
5). All materials be ROHS directive tested;
| Testing Item | Testing Standard | Testing Data |
| Aging test | USB charger for 2 hours with LED lights must always light | 2 hours |
| High and low pressure 90V-264V to normal operation | 90V-264V normal | |
| Power test | Rated output voltage range: no-load: 5V±5%, load:5V±5% | No-load: 4.92-4.95V, load: 5.04-5.1 |
| Rated output current | 5.0V | |
| Output ripple: load 1A/2.1A, Vpp<200mV | 117mV-146mV | |
| Short circuit protection: output positive and negative short for 2 minutes, after the break to work properly | 2 minutes | |
| Pin output voltage: D-: 2.75VDC/D+:2VDC, subject to actual test value | D-:2.77V/D+:2.763V | |
| Pressure test | Under normal climatic conditions, the input and output terminals should withstand the corresponding voltage(USB-10, 101 series for the 1500V, the other is more than 3000V), Generally every test a minute without breakdown flashing phenomenon was qualified, and leakage≤5mA. | 3000V0.68mA-0.69mA |
| Insulation resistance test | In the normal temperature environment, AC input plug and DC input plug between the input DC500V, 1 minute after the insulation resistance of 7 trillion or more | ∞ |
| Grounding resistance | In any case the resistance shall not exceed 100mΩ | |
| Temperature rise test | At room temperature 30℃rated work, the charger rated for 2 h after the measurement of its shell surface temperature change <1℃/ h that the temperature is stable, this time measuring the surface temperature of its shell <50℃ | Pass |
| Limit load | Test the product load current limit can run the load value | pass |
The enclosures of all maintenance boxes shall be fabricated from halogen-free, non-toxic, and environmentally sustainable materials. Their corrosion resistance shall be capable of withstanding exposure to solutions with an acid concentration of 10% or an alkali concentration of 10% and above. The material shall exhibit a temperature stability range of no less than -40°C to +90°C, and its flame resistance temperature in the hot filament test shall not be lower than +960°C. It shall possess properties such as full insulation, dust resistance, water resistance, corrosion resistance, impact resistance, UV resistance, heat resistance, flame retardancy, shock resistance, and high mechanical strength.
Sectional maintenance boxes shall be made of polycarbonate material, which is characterized by corrosion resistance, halogen-free composition, flame retardancy, and self-extinguishing capability. The impact resistance rating shall meet IK09, and the box body shall be of an integrated design. Sealing bolts shall be provided for cable entry into the maintenance boxes, and sufficient space for incoming cables shall be considered. Sockets shall have high impact resistance and corrosion resistance; industrial connectors shall have a protection rating of IP67. Sockets and circuit breakers shall be mounted on the surface of the box body for ease of operation, with specific configurations detailed in the system diagram of the sectional maintenance boxes. The overall protection rating of the maintenance boxes shall reach IP66.