CN3

YMIN CN3 Series Aluminum Electrolytic Capacitors: The Power Foundation for Harsh Industrial Environments

In core areas of modern industry such as industrial automation, new energy conversion, and electric drives, the stability and reliability of equipment are the primary standards for measuring its value. The heart of these devices—high-power switching power supplies, frequency converters, servo drives, etc.—operates for extended periods in harsh environments characterized by high temperatures, high ripple currents, and frequent load fluctuations. For capacitors, the key energy storage and filtering components, this is undoubtedly an extreme test. YMIN Electronics, deeply rooted in capacitor manufacturing, has launched its CN3 series aluminum electrolytic capacitors, a high-performance solution designed to meet these challenges. With its superior ultra-low temperature adaptability, long service life, and stable electrical performance, it becomes a solid "power foundation" supporting the stable operation of industrial equipment.

I. Core Advantages: Designed for Reliability and Durability

The CN3 series is not an ordinary general-purpose capacitor; its design philosophy has focused on high-reliability applications from the outset. Compared to standard products, it achieves a performance leap in multiple dimensions.

1. Exceptional Low-Temperature Operation Capability:

Industrial equipment, especially facilities deployed outdoors or in cold regions (such as wind power converters, rail transportation, and cold-weather industrial machinery), often faces severe challenges in low-temperature environments during startup and operation. At low temperatures, the viscosity of the electrolyte in ordinary electrolytic capacitors increases, leading to a sharp rise in equivalent series resistance (ESR) and a significant drop in capacitance. This renders them ineffective in their filtering function and may even cause equipment startup failure or malfunction.

One of the core advantages of the CN3 series is its outstanding performance at -40°C. Through a special electrolyte formulation and advanced material processing, CN3 ensures that it maintains excellent capacitance characteristics even at extreme low temperatures. Its technical parameters explicitly require: at -25°C, the capacitance-to-capacitance ratio at 20°C is ≥0.8; even under extremely cold conditions of -40°C, this ratio remains at ≥0.65. Simultaneously, its impedance variation is also strictly controlled. This feature ensures stable startup and reliable operation of the equipment, regardless of harsh winter conditions or significant diurnal temperature variations, greatly expanding its application range.

2. High-Temperature Durability Up to 3000 Hours:

High temperature is the "enemy" of electrolytic capacitors and a key factor affecting their lifespan. The CN3 series guarantees a service life of up to 3000 hours at its rated operating temperature of 85℃. This data comes from rigorous accelerated life testing: after 3000 hours of continuous operation at 85℃ with rated voltage and rated ripple current, key parameters such as capacitance change rate, loss tangent (DF), and leakage current must still meet stringent specifications (e.g., capacitance change ≤ ±20%). This means that in actual operating conditions, if the internal ambient temperature is below 85℃, the actual lifespan of the capacitor will far exceed this value. This long-life design directly reduces the equipment's failure rate and total life-cycle maintenance costs, making it particularly suitable for industrial applications requiring continuous long-term operation.

3. Low Impedance, Low Loss, and High Ripple Current Tolerance:

In modern high-frequency switching power supplies, capacitors need to handle large amounts of high-frequency ripple current. Low ESR (Equivalent Series Resistance) and low DF (Dissipation Tangent) mean that the capacitor generates less heat and is more efficient. The CN3 series achieves low ESR and low DF characteristics (maximum DF ≤ 0.15 @ 20℃/120Hz) through optimized electrode foil and electrolyte. This not only reduces the temperature rise of the capacitor and extends its lifespan, but also means that it can withstand higher rated ripple current. The detailed ripple current table in the product datasheet shows that this series can withstand ripple currents in the range of several amperes, ensuring a clean and stable DC voltage for the circuit under severe current fluctuations, improving the energy efficiency and stability of the entire system.

4. Stringent Safety and Insulation Standards:

Industrial safety is paramount. The CN3 series is designed with safety in mind. Its insulation withstand voltage reaches up to AC 2000V/1 minute (between the terminal and the bolt with the insulating sleeve), and its insulation resistance is ≥100MΩ. This provides a strong safety barrier for equipment and operators, effectively preventing short circuit risks caused by overvoltage breakdown, and complies with stringent industrial safety regulations.

II. Application Scenarios Analysis: Empowering Core Industrial Sectors

These characteristics of the CN3 series make it an indispensable key component in the following industrial applications:

1. Industrial Frequency Inverters and Servo Drives:

This is the most classic application area for the CN3 series. In frequency inverters, the CN3 is mainly used as a DC-Link Capacitor. Its function is to smooth the rectified DC voltage, absorb the high-frequency ripple current generated by the switching action of the inverter bridge (IGBT), and provide a low-impedance energy source for the IGBT. The CN3's high withstand voltage (350V-500V DC), high ripple current withstand capability, and long lifespan directly determine the output stability, efficiency, and reliability of the frequency inverter. In servo drives, its function is similar, ensuring precise motor control and rapid response. 2. Uninterruptible Power Supply (UPS) and Industrial Power Supplies:

In high-power UPS and industrial switching power supplies, CN3 is also used as a main filter capacitor. When the mains power is interrupted, the UPS battery energy is output to the load through the inverter, during which the stability of the DC bus is crucial. CN3's large capacity (47-1000μF) and low ESR characteristics effectively maintain the stability of the bus voltage, ensuring a pure sine wave output and protecting critical downstream equipment (such as servers and precision instruments) from power outages or interference.

3. New Energy Sector: Photovoltaic Inverters and Wind Power Converters:

In solar and wind power generation systems, environmental conditions are harsh (large temperature differences, high humidity), and the energy conversion process is accompanied by complex power fluctuations. The wide temperature adaptability (-40℃ to +85℃) and high reliability of the CN3 series shine here. In the DC-DC boost stage and DC-AC inverter stage of photovoltaic inverters, CN3 acts as a support and filter capacitor, ensuring efficient conversion and stable grid connection of new energy power generation.

4. Other Applications:

Furthermore, CN3 can be widely used in welding machines, electromagnetic heating equipment, elevator control systems, power reactive power compensation devices, and any other application requiring high-voltage, high-capacity, and high-reliability electrolytic capacitors. Its snap-in design facilitates quick and secure mounting on PCBs, adapting to automated production, while its compact structure maximizes capacitor performance within limited space.

III. Design and Quality Assurance: YMIN's Commitment

YMIN Electronics infuses the CN3 series with rigorous manufacturing processes and comprehensive quality control. From high-purity aluminum foil etching to specially formulated low-temperature, high-efficiency electrolytes, and fully automated packaging and aging tests, every step strives for precision. The products fully comply with the RoHS directive, meeting global environmental requirements. Complete datasheets and detailed technical parameters provide ample data support for customer design selection.

IV. Conclusion: Choose CN3, Choose Sustainable and Stable Industrial Power

In conclusion, the YMIN CN3 series aluminum electrolytic capacitors are not just simple electronic components; they are engineering solutions to the challenges of industrial applications. With its ultra-low temperature performance, long lifespan, low loss, and high safety, CN3 perfectly meets the stringent quality requirements of modern industrial equipment for core components. In the era of Industry 4.0, which pursues efficiency, reliability, and intelligence, choosing CN3 means choosing a durable "power foundation" for your products. It will inject continuous and stable power into your industrial equipment, helping it win reputation and trust in fierce market competition.