COSIC DC Power Supply Series

1. Product Overview

The COSIC DC Power Supply series, featuring core models including 4NIC DC50, 4NIC DC75, 4NIC DC100, 4NIC DC125, 4NIC DC150, 4NIC DC200, 4NIC DC250, 4NIC DC300, 4NIC DC400, and 4NIC DC500, is a high-performance, industrial-grade direct current power supply solution designed to meet the diverse power needs of professional scenarios. With input voltage options of 12V and 24V (partial models support single 24V input) and output voltage ranges covering 5V, 12V, 13.8V, 15V, 24V, 28V, and 48V, the series delivers output current from 2A to 100A, with size specifications ranging from 86×41×12.7mm to 500×410×290mm. This comprehensive product lineup is engineered to solve the core pain points of unstable power supply, mismatched voltage/current, and poor adaptability to harsh working environments, providing reliable, efficient, and customizable power support for industrial production, electronic equipment testing, and precision instrument operation.

2. Key Features

All models in the COSIC 4NIC series adopt high-precision PWM (Pulse Width Modulation) control technology, with a voltage regulation accuracy of ±0.5% and current regulation accuracy of ±1%, ensuring stable output even under fluctuating input voltage (100-240V AC). The output voltage and current can be adjusted within the rated range to match the specific requirements of different devices, eliminating the risk of equipment damage caused by overvoltage or overcurrent. For example, the 4NIC DC75 (output ±5V ±7.5A) supports dual-polarity output, making it suitable for precision analog circuits and electronic component testing.

3. Structural Characteristics

The COSIC 4NIC DC Power Supply series features a compact, modular design with a rugged metal case (aluminum alloy or cold-rolled steel) that provides excellent electromagnetic interference (EMI) shielding and mechanical protection. The case is designed to resist dust, moisture, and vibration, meeting the IP30 protection standard. The size varies by model: small models like the 4NIC DC50 (86×41×12.7mm) are suitable for space-constrained environments (e.g., embedded systems), while large models like the 4NIC DC960F (340×240×155mm) are designed for high-power industrial applications.

4. Applicable Working Conditions

The COSIC 4NIC DC Power Supply series is designed to adapt to a variety of industrial and professional working environments, with the following technical parameters to ensure reliability:

• Ambient temperature: -10°C ~ 50°C (operating); -40°C ~ 70°C (storage)
• Relative humidity: 10% ~ 90% (non-condensing)
• Input voltage range: 100V ~ 240V AC, 50/60Hz
• Altitude: ≤ 2000m (above 2000m, derating by 1% per 100m)
• Electromagnetic compatibility (EMC): Complies with IEC 61000-4-2 (ESD), IEC 61000-4-3 (RS), and IEC 61000-4-5 (Surge) standards

5. Maintenance and Care Recommendations

To ensure the long-term stable operation of the COSIC 4NIC DC Power Supply, it is recommended to perform routine inspections every 3 months: check the power cord for damage, clean the fan and heat sink (remove dust with compressed air), and verify the accuracy of voltage and current output using a multimeter. For models used in dusty environments (e.g., factories), increase the inspection frequency to once a month.

We supply the following spare parts:

COSIC DC Power Supply
Model			Size（mm）
	Input	out put
4NIC DC50	24V	5VlQA(msps)	86X41X12.7
4NIC DC50	12V24V	5V10A	120x85x30
4NIC DC50	12V24V	5V10A	150x120x50
4NIC DC50	12V24V	5V8A-12VQ. 8A	150x120x50
4NIC—DC75	12V24V	5Vl 5A (msps)	86x41x12.7
4NIC DC75	12V24V	5Vl 5A	130x120x50
4NIC DC75	12V24V	5Vl 5A	160x120x50
4NIC DC75	12V24V	±5V±7- 5A	160x120x50
4NIC—DC75	12V24V	5V10A-12V2A	160x120x50
4NIC–DC100	12V24V	5V20A	180x120x50
4NIC DC100	24V	5V20A(msps)	86X72X12.7
4NIC DC100	24V	5V20A	140x120x50
4NIC DC100	12V24V	5Vl5A—5V5A	180X120X50
4NIC DC99	12V24V	5V15Aqi 2V2A	180x120x50
4NIC DC125	12V24V	5V25A	190X120X50
4NIC DC125	12V24V	5V20A-5V5A	200x120x50
4NIC DC124	12V24V	5V20A-12V2A	190X120X50
4NIC DC150	12V24V	5V30A	200x120x50
4NIC-DC150	12V24V	5V24A 5V6A	200X120X50
4NIC DC156	12V24V	5V24A-12V3A	200x120x50
4NIC DC200	12V24V	5V40A	220X120X50
4NIC–DC200	12V24V	5 V 30 a—5v10a	200X140X50
4NIC—DC198	12V24V	5V30A 12V4A	200X140X50
4NIC DC250	12V24V	5V50A	240x140x50
4NIC—DC300	12V24V	5V60A	260x160x60
4NIC DC400	12V24V	5V80A	260x180x80
4NIC- DC500	12V24V	5V100A	280x220x125
4NIC- DC50	12V24V	12V4J7A	150X120X50
4NIC-DC48	12V24V	±12V±2A	150x120x50
4NIC DC75	12V24V	12V6- 25A	160X120X50
4NIC DC72	12V24V	±12V±3A	160x120x50
4NIC DC100	12V24V	12V8. 33A	180x120x50
4NIC DC100	12V24V	±12V±4.17A	180X120X50
4NIC DC125	12V24V	12V10. 4A	190x120X50
4NIC DC124.8	12V24V	±12V±5.21A	190x120x50
4NIC—DC150	12V24V	12V12. 5A	180x120x50
4NIC DC150	12V24V	±12V 上 6. 25A	190X120X50
4NIC-DC192	12V24V	12V16A	220x120x50
4NIC DC200	12V24V	土12V±8. 33A	220X120X50
4NI0 DC240	12V24V	12V20A	220x160x60
4NIC DC360	12V24V	12V30A	220x180X80
4NIC-DC480	12V24V	12V40A	260X180X80
4NI0 DC600	24V	12V50A	280x180x80
4NIC DC720	24V	12V60A	280x220x125
4NIC DC840F	24V	12V70A	300x220x125
4NIC DC960F	24V	12V80A	340x240x155
4NIC—DC55.2	12V24V	13. 8V4A	160X120X50
4NIC DC69	12V24V	13. 8V5A	160X120X50
4NIC DC82. 8	12V24V	13. 8V6A	180x120x50
4NIC DC110.4	12V24V	13. 8V8A	190X120X50
4NIC- DC138	12V24V	13. 8V10A	200X120X50
4NIC-DC165.6	12V24V	13. 8V12A	220X120X50
4NIC-,DC207	12V24V	13- 8V15A	240X140X50
4NIC- DC276	12V24V	13. 8V20A	240X160X60
4NIC-DC414	24V	13. 8V30A	240X180X80
4NIC-DC552	24V	13. 8V40A	260X180X80
4NIC -DC690	24V	13. 8V50A	260X220X125
4NIC – DC828F	24V	13. 8V60A	300X240X155
4NIC-DC966F	24V	13. 8V70A	320x240x155
4NIC – DC1104F	24V	13. 8V80A	340X240X155
4NIC -DC50	12V24V	15V3. 3A	150X120X50
4NIC – DC50	12V24V	士 15V±1.67A	150X120X50
4NIC -DC75	12V24V	15V 5 a	160X120x50
4NIC DC75	12V24V	±15V 各 2. 5A	160x120x50
4NIC -DC100	12V24V	15V6. 67A	180x120x50
4NIC -DC100	12V24V	士 15V 士 3. 33A	180X120X50
4NIC -DC125	12V24V	15V8. 33A	190X120X50
4NIC- -DC125	12V24V	士 15V 士 4.17A	190X120X50
4NIC- DC150	12V24V	15V10A	180X120X50
4NIC- DC150	12V24V	±15V 各 5A	180X120X50
4NIC- DC200	12V24V	15Vl3. 3A	200X120X50
4NIC- DC200	12V24V	士 15V 土&67A	200X120X50
4NIC DC225	12V24V	15V15A	240X140X50
4NIC DC300	12V24V	15V20A	240X160X50
4NIC DC375	12V24V	15V25A	240x180x80
4NIC- -DC450	24V	15V30A	260X180X80
4NIC DC600	24V	15V40A	260X220X125
4NIC – DC750	24V	15V50A	280X240X125
4NIC DC900F	24V	15V60A	320X240X155
4NIC- -DC1050F	24V	15V70A	360X240X155
4NIC—DC1200F	24V	15V80A	360x240x155
4NIC—DC50	12V24V	24V2. 08A	150X120X50
4NIC—DC75	12V24V	24V3.13A	160X120X50
4NIC—DC100	12V24V	24V4.17A	180x120x50
4NIC—DC125	12V24V	24 V5. 21A	180X120X50
4NIC—DC150	12V24V	24V6. 25A	180X120x50
4NIC—DC200	12V24V	24V8. 33A	200x120x50
4NIC—DC240	12V24V	24V10A	220X140X50
4NIC DC288	24V	24V12A	220X140X50
4NIC—DC360	24V	24V15A	220X180X80
4NIC DC480	24V	24V20A	220X180X80
4NIC—DC600	24V	24V25A	240X180X80
4NIC DC720	24V	24V30A	300x180x80
4NIC -DC960F	24V	24V40A	320X240X155
4NIC DC1200F	24V	24V50A	360X240X155
4NIC DC1440F	24V	24V60A	380X240X155
4NIC DC1680F	24V	24V70A	380X240X155
4NIC DC1920F	24V	24V80A	400X270X230
4NIC- DC2160F	24V	24V90A	400X270X230
4NIC DC2400F	24V	24V100A	400X270X230
4NIC–DC56	12V24V	28V2A	150X120X50
4NIC DC84	12V24V	28V3A	160X120X50
4NIC-DC112	12V24V	28V4A	180X120X50
4NIC—DC140	24V	28V5A	200X120X50
4NIC DC168	24V	28V6A	210X120X50
4NIC DC224	24V	28V8A	220X120X50
4NIC DC280	24V	28V10A	220X140X50
4NIC—DC420	24V	28V15A	220x180x80
4NIC—DC560	24V	28V20A	240X180X80
4NIC- DC840	24V	28V30A	280x220x125
4NIC- DC1120F	24V	28V40A	340X240X155
4NIC- DC1400F	24V	28 V 50A	360X240X155
4NIC—DC1600F	24V	28V60A	380x240X155
4NIC—DC1960F	24V	28V70A	400x270x230
4NIC-DC2240F	24V	28V80A	400x270x230
4NIC DC2800F	24V	28V100A	420X300X260
4NIC—DC96	12V24V	48V2A	160X120X50
4NIC—DC144	12V24V	48V3A	180X120X50
4NIC—DC192	12V24V	48V4A	190x120x50
4NIC—DC240	24V	48V5A	220X120X50
4NIC—DC288	24V	48V6A	240X140X50
4NIC DC384	24V	48V8A	220x180x80
4NIC—DC480	24V	48V10A	240X180X80
4NIC -DC576	24V	48V12A	260X180X80
4NIC—DC720	24V	48V15A	280X220X125
4NIC -DC960F	24V	48V20A	300X240X155
4NIC—DC1200F	24V	48V25A	360X240X155
4NIC—DC1440F	24V	48V30A	380X240X155
4NIC—DC1920F	24V	48V40A	400X270X230
4NIC—DC2400F	24V	48V50A	400X270X230
4NIC- DC2880F	24V	48V60A	420x300X260
4NIC -DC3360F	24V	48V70A	450X300X260
4NIC—DC3840F	24V	48V80A	500x410X290
4NIC—DC4320F	24V	48V90A	500X410X290
4NIC—DC4800F	24V	48V100A	500X410X290

6. On-Site Fault Repair Cases

Case 1: No Output Voltage (4NIC DC100 Model)

Symptom: The power supply is turned on, the power indicator is on, but there is no output voltage. The connected electronic testing equipment cannot be powered on.

Inspection and Repair: Professional maintenance personnel checked the power supply and found that the output fuse (5A/250V) was blown. The cause was a short circuit in the connected testing equipment, which triggered the overcurrent protection and blew the fuse. After replacing the fuse and repairing the short circuit in the testing equipment, the power supply resumed normal output. Precaution: Always check the connected equipment for short circuits before powering on the power supply.

Case 2: Unstable Output Voltage (4NIC DC150 Model)

Symptom: The output voltage of the 4NIC DC150 (15V 10A) fluctuates between 14.5V and 15.5V, causing the connected industrial sensor to work abnormally.

Inspection and Repair: The maintenance team found that the voltage adjustment potentiometer was worn out due to long-term use, leading to unstable contact. After replacing the potentiometer (model: 10kΩ precision potentiometer) and calibrating the output voltage, the voltage stability was restored to ±0.1V. Precaution: Regularly check and calibrate the adjustment knobs to ensure precision.

Case 3: Over-Temperature Shutdown (4NIC DC200 Model)

Symptom: The 4NIC DC200 (5V 40A) shuts down automatically after 30 minutes of operation, and the over-temperature indicator lights up.

Inspection and Repair: Inspection revealed that the cooling fan was blocked by dust, resulting in poor heat dissipation. The fan was cleaned with compressed air, and the heat sink was wiped with a dry cloth. After testing, the power supply operated continuously for 4 hours without over-temperature shutdown. Precaution: Regularly clean the fan and heat sink to ensure effective heat dissipation, especially in dusty environments.

7. Frequently Asked Questions (FAQ)

Question	Answer
Which model of the COSIC 4NIC series is suitable for high-power industrial equipment (requiring 5V 50A output)?	The 4NIC DC250 model is specifically designed for high-power applications, with an output of 5V 50A and a size of 240×140×50mm. It features a forced air cooling system and multiple protection mechanisms, making it ideal for powering high-power industrial equipment such as frequency converters and large-scale sensors. For higher power demands (e.g., 5V 100A), the 4NIC DC500 model is recommended.
Can the COSIC 4NIC DC Power Supply be used in outdoor environments?	The standard models (IP30 protection) are designed for indoor use. However, if outdoor use is required, we recommend choosing the enhanced waterproof and dustproof version (IP54 protection) to adapt to harsh outdoor conditions. The enhanced version is equipped with a sealed case and corrosion-resistant components, suitable for outdoor telecommunications base stations and renewable energy systems. Please confirm the environmental requirements when placing an order.
How to calibrate the output voltage and current of the 4NIC series power supply?	To calibrate the output, you will need a precision multimeter (accuracy ≥ 0.1%). First, turn on the power supply and let it warm up for 30 minutes. Then, adjust the voltage adjustment knob to the desired value and use the multimeter to measure the actual output voltage. If there is a deviation, use a screwdriver to adjust the internal calibration potentiometer (located on the circuit board) until the measured value matches the set value. Repeat the same steps for current calibration. It is recommended to calibrate the power supply every 6 months to ensure accuracy. For non-professionals, please contact our technical support team for assistance.

8. Procurement Guide and Call to Action

The COSIC 4NIC DC Power Supply series offers a comprehensive range of models to meet the diverse needs of different industries and applications. Whether you need a small-scale power supply for laboratory testing (e.g., 4NIC DC50, 4NIC DC75) or a high-power solution for industrial production (e.g., 4NIC DC250, 4NIC DC500), we have the right product for you. Our power supplies comply with international standards (IEC, CE, RoHS) and undergo strict quality control (100% full-load testing before delivery), ensuring reliable performance and long service life.