I. Product Overview
The CUH0805 series current sensing resistors are ultra-high power chip resistors manufactured using thick film technology. Featuring a compact and lightweight design, along with stable and reliable performance, they play a crucial role in current detection and current limiting in various electronic devices. Complying with industry standards, these products offer high quality and strong environmental adaptability, meeting the precise current sensing needs of different scenarios and providing core support for the stable operation of electronic equipment.
II. Core Application Fields
- Consumer electronics: Current detection and circuit protection modules in various portable electronic devices.
- Home appliances: Power management and current monitoring units in air conditioners, refrigerators, and other household appliances.
- Computers and related products: Current distribution and safety protection circuits in motherboards and other core components.
- Communication equipment: Power control and signal stabilization systems in mobile phones, fax machines, and other communication terminals.
- Power equipment: Current regulation and overload protection links in power supplies and lighting equipment.
- Measuring instruments: Precise current detection and data acquisition modules in electric meters, navigation equipment, and other precision instruments.
III. Key Performance Parameters
- Power Rating: At an ambient temperature of 70℃, the rated power is 0.5W, ensuring stable operation in medium-power scenarios.
- Voltage Tolerance: The maximum working voltage is 200V, and the maximum overload voltage reaches 300V, providing strong voltage-bearing capacity to avoid product damage caused by voltage fluctuations.
- Resistance Range: Varies by tolerance grade. For grades D (±0.5%), F (±1%), and G (±2%), the resistance range is 10Ω~1MΩ; for grade J (±5%), it is 10Ω~10MΩ. Additionally, it supports special resistance requirements of 1Ω＜R＜10Ω, covering the parameter needs of various application scenarios.
- Temperature Characteristics: The Temperature Coefficient of Resistance (T.C.R.) is 100 PPM/℃, and the operating temperature range is as wide as -55℃~155℃. It maintains stable resistance performance even in extreme high and low-temperature environments, ensuring the accuracy of detection data.
- Physical Dimensions (Unit: mm): Length (L) 2.00±0.10, Width (W) 1.25±0.10, Height (H) 0.50±0.15, Electrode length l1=0.30±0.15, l2=0.40±0.15. The compact size facilitates installation and layout on dense circuit boards.
IV. Core Product Advantages
- Compact and Lightweight: The compact chip structure design is small in size and light in weight, saving circuit board installation space and adapting to high-density wiring requirements.
- High Reliability: Adopting high-quality thick film materials and precision manufacturing processes, it possesses excellent anti-aging and anti-vibration performance, ensuring a long service life and reducing equipment maintenance costs.
- Precision and Stability: Strict tolerance control and excellent temperature coefficient performance ensure low resistance change rate and high current detection accuracy under different operating environments and load conditions.
- Wide Environmental Adaptability: The broad operating temperature range and high voltage tolerance enable it to adapt to the complex and variable working environments of industrial and civil electronic equipment.
- Easy Installation: Compatible with standard Surface Mount Technology (SMD) and conforming to industry-universal packaging specifications, it facilitates mass assembly on automated production lines, improving production efficiency.
V. Reliability Test Guarantee
The CUH0805 series current sensing resistors have undergone a number of rigorous reliability tests to ensure stable and reliable product performance:
- Temperature Coefficient of Resistance (T.C.R.) Test: Conducted in accordance with JIS-C-5201-1 4.8 and IEC-60115-1 4.8 standards at 25℃/ -55℃ and 25℃/+155℃, meeting specification requirements.
- Short Time Overload Test: Applying 5 times the rated power or the maximum overload voltage (whichever is smaller) for 5 seconds in accordance with relevant standards, the resistance change rate is controlled within 1% (for grades D/F/G) and 2% (for grade J).
- Resistance to Soldering Heat Test: Maintaining stability at 260±5℃ for 10 seconds, with resistance change meeting strict standards.
- Rapid Change of Temperature Test: Undergoing 5 cycles of tests from -55℃ to +155℃, maintaining stable performance.
- Other Tests: It has also passed multiple tests such as resistance to solvent, damp heat with load, load life, insulation resistance, and bending strength, comprehensively verifying the product's reliability in different usage scenarios.
VI. Packaging and Storage Requirements
- Packaging Specifications: Supports two packaging methods: Paper Taping and Embossed Taping. The key dimensions (unit: mm) of Paper Taping packaging are A=1.55±0.2, B=2.30±0.2, W=8.0±0.2, etc.; the reel packaging options include 5K/Reel, 10K/Reel, 20K/Reel, etc. The relevant dimensions of the reel (unit: mm) are A=2.0±0.5, B=13.5±1.0, C=21±1.0, etc., adapting to different production and assembly needs.
- Storage Conditions: Under the environment of ambient temperature 25±5℃ and humidity 60±20%, the product has a shelf life of one year from the date of delivery. During storage, it should be avoided from high temperature, high humidity, and corrosive environments to ensure that the product performance is not affected.
VII. Conclusion
With its compact size, precise and stable performance, wide application scenarios, and strict reliability guarantee, the CUH0805 series current sensing resistors have become an ideal choice for current detection and control links in electronic devices. Whether in consumer electronics, home appliances, communication equipment, measuring instruments, or other fields, this product can contribute to more efficient and stable operation of equipment with its excellent performance. We always adhere to the concept of high-quality production, providing customers with reliable electronic component solutions, and look forward to cooperating with customers from various industries to achieve win-win results and create a bright future for the electronic industry.
