SN3

SN3 Series: Infusing the Core of Industrial Power with Long-Lasting Stability

In the grand scheme of modern industrial development, whether it's precisely controlled servo drives or efficient and reliable industrial power supplies, the stable operation of these components relies on the dedicated and dedicated core components. These components act as the "energy warehouses" and "stabilizers" of industrial equipment, ensuring the precision and efficiency of every power conversion. The SN3 series aluminum electrolytic capacitors are precisely these high-performance components, designed for harsh industrial environments. Their exceptional durability, stable electrical performance, and wide application adaptability make them a trusted choice for engineers designing high-reliability systems.

1. Precise Positioning: A Standard Solution Designed for Industrial-Grade Applications

The SN3 series' core positioning is clear: industrial-standard applications. Its "85°C 3000-hour" durability life test standard directly addresses the rigid requirements of industrial equipment for long-term, uninterrupted operation. Compared to standard consumer capacitors, this standard means the SN3 series has endured extended periods of extreme testing in high-temperature environments. Dielectric and electrolyte degradation is kept to extremely low levels, ensuring a stable service life of several years or even longer in actual use. This long life is crucial for reducing equipment failure rates, lowering maintenance costs, and improving overall production line efficiency.

Furthermore, the SN3 series is fully RoHS-compliant, demonstrating its commitment to environmental protection and safety. This ensures seamless access to major global markets and meets international environmental standards.

II. Core Technical Features: Four Cornerstones of Reliability

1. Wide Voltage and Capacitance Range, Providing Flexible Design

The SN3 series offers a wide voltage range from 16V to 550V and a wide capacitance range from 100μF to a staggering 56,000μF. This broad coverage allows engineers to find the right model for various circuit topologies, such as bus voltage filtering and output rectifier filtering. Whether for low-voltage, high-current servo drives or high-voltage industrial inverters, the SN3 series provides the perfect combination of withstand voltage and capacity, offering great flexibility and convenience for circuit design.

2. Excellent electrical performance ensures efficient and stable systems

◦ Low dissipation factor (DF): The SN3 series specifies strict maximum DF values ​​at different rated voltages. Low loss means that the capacitor generates less heat during charging and discharging, and when subjected to AC ripple current. This not only improves energy efficiency but also directly reduces capacitor temperature rise, a key factor in ensuring its long life.

◦ Strict leakage current control: Product standards specify a leakage current of ≤1.5mA or 0.01CV (whichever is greater). Low leakage current means that the capacitor's stored charge is retained longer in power-off or standby mode, reducing unnecessary energy loss. This is crucial for circuits requiring fast startup or energy conservation.

◦ High ripple current capability: The SN3 series provides detailed rated ripple current values, along with frequency and temperature correction factors. In switching power supplies and inverters, ripple current is the primary cause of capacitor heating. The SN3's high ripple current capability enables stable operation in harsh electrical environments rife with high-frequency harmonics, providing smooth, clean DC voltage for power devices.

3. Robust Physical Structure and Safety Design

The SN3's snap-in design securely attaches to the PCB during installation, offering excellent resistance to vibration and mechanical stress, making it ideal for applications subject to constant vibration, such as motor drives and robotics. Furthermore, the product specifies insulation resistance and insulation voltage (e.g., AC 2000V/1 minute) between the terminal and the insulation sleeve, effectively preventing the risk of equipment short circuits due to creepage or breakdown, adding another safety barrier to the entire system.

4. Excellent Environmental Adaptability and Reliability

In addition to a 3000-hour endurance test at 85°C, the SN3 also undergoes a 1000-hour storage life test at 85°C. This means that even after storage for a period of time, performance parameter fluctuations remain within manageable limits, ensuring product consistency after shipment. Its wide operating temperature range (e.g., -40°C to +85°C) ensures reliable startup and operation in extreme temperatures across northern and southern China, and in winter and summer.

III. In-Depth Practical Application Scenarios: How SN3 Empowers Various Industries

1. Industrial Automation and Servo Drive Systems

In servo drives and programmable logic controllers (PLCs), SN3 is primarily used for main circuit DC bus filtering. It absorbs the large pulsating current from the rectifier bridge and provides a stable and smooth DC voltage for the inverter (IGBT). SN3's high withstand voltage, large capacity, and robust ripple current handling ensure accurate and stable torque output during frequent starts and stops, accelerations, and decelerations in servo motors, contributing to improved processing accuracy and response speed.

2. Industrial Switch-Mode Power Supplies (SMPS)

As the "heart" of communications equipment, CNC machine tools, and other applications, industrial power supplies require extremely high stability. SN3 plays a key role in the power supply's primary PFC circuit and secondary output filtering circuit. Its long lifespan directly determines the power supply's overall MTBF (mean time between failures), effectively preventing downtime due to capacitor failure and ensuring the continuity of critical production processes.

3. New Energy Applications: Photovoltaic Inverters and Charging Stations

In the DC-Link circuit of a photovoltaic inverter, capacitors must withstand high voltages and significant high-frequency ripple currents. The stable performance of the SN3 series' medium- and high-voltage (e.g., 450V-550V) models provides a solid foundation for the inverter's efficient power conversion. Similarly, in DC charging station modules, the SN3 can operate stably in high-temperature, high-power density environments, contributing to the efficient utilization of green energy.

4. Other Emerging Applications: Robots, Drones, etc.

The rise of intelligent devices such as industrial robots, AGVs, and drones is placing higher demands on the power density and reliability of their drive systems. The SN3 series, with its compact size (available in a variety of diameters and lengths) and powerful performance, is well-suited for these advanced devices operating in space-constrained and complex environments.

Conclusion

The SN3 series aluminum electrolytic capacitor is more than just a simple electronic component; it's the cornerstone of the robust operation of modern industrial equipment. With its long life, high reliability, excellent electrical performance, and wide application adaptability, it perfectly meets the stringent requirements placed on core components in the industrial sector. When choosing capacitors, high-standard industrial-grade products like the SN3 series provide long-term peace of mind and security for your system, making it a wise choice for building high-quality, highly reliable industrial equipment. Standing quietly on the PCB, it silently safeguards every precise transmission of industrial power with its superior performance, empowering the future of intelligent and efficient industrial manufacturing.