SN-470uF-400V
High-voltage snap-in capacitor with 470uF and 400V rating for PFC and input filtering.
Product Overview
Description
The SN-470uF-400V is a high-voltage snap-in aluminum electrolytic capacitor designed for PFC output and input filtering applications. With 470uF capacitance and 400V rating, it handles high-voltage power supply requirements.
This capacitor features robust construction for high-voltage operation and snap-in terminals for secure mounting. The optimized design provides good ripple current capability for high-voltage applications.
Rated for 5,000 hours at 85C, this capacitor is suitable for industrial power supplies, inverters, and PFC circuits requiring high-voltage capacitors.
Product Series
SN
Primary Application
PFC output filtering
Key Features
- High voltage 400V rating
- 470uF capacitance
- Snap-in mounting
- High ripple current 2.8A
- PFC applications
Specifications
| Capacitance | 470uF +/-20% |
|---|---|
| Voltage Rating | 400V DC |
| Ripple Current | 2.8A @ 85C, 120Hz |
| Temperature Range | -25C to +85C |
| Lifetime | 5,000 hours @ 85C |
| Mounting | Snap-in |
| Dimensions | 25mm dia x 45mm L |
Applications
PFC output filtering
Electronic system design
Input rectifier filtering
Electronic system design
Industrial inverters
Industrial automation and control
High-voltage power supplies
Electronic system design
FAE Expert Insights
"The SN-470uF-400V is my go-to capacitor for PFC output filtering in power supplies. The 400V rating handles 380V DC bus voltages with good margin. The 470uF capacitance provides excellent energy storage for PFC circuits. I use this capacitor in industrial power supplies, LED drivers, and motor drive applications. The snap-in terminals ensure reliable mounting in high-vibration environments."
Ideal for PFC applications; 400V rating for high-voltage systems; reliable snap-in mounting
— Michael Zhang, BeiLuo
Frequently Asked Questions
What is the maximum ripple current?
The rated ripple current is 2.8A at 85C and 120Hz. This rating is suitable for PFC output applications with moderate switching currents. At lower temperatures, higher ripple currents can be handled. For high-frequency PFC circuits, derating may be required.
For high-ripple PFC applications, verify current requirements against ratings.
What is the expected lifetime?
Rated lifetime is 5,000 hours at 85°C. Using the Arrhenius equation, lifetime extends to approximately 20,000 hours at 65°C and 80,000 hours at 45°C. Every 10°C reduction in operating temperature doubles the capacitor lifetime. This relationship is fundamental to reliability engineering. For applications requiring longer lifetime, consider the SH series with 105°C rating and 8,000+ hour lifetime. Proper thermal management including adequate airflow and heat sinking can significantly extend actual operating lifetime beyond rated values.
Operate at lowest practical temperature for maximum lifetime. Consider 105°C rated capacitors for extended lifetime requirements.
What voltage derating is recommended?
Industry standard is 80% voltage derating for aluminum electrolytic capacitors. For this 400V capacitor, maximum recommended operating voltage is 320V. This 20% margin provides protection against voltage transients, line surges, and PFC overvoltage conditions while significantly improving reliability and extending lifetime. Operating at 80% voltage can provide 2-4x longer life compared to operating at 100% rated voltage. For critical applications, 50% derating may be used for maximum reliability.
Design for 80% voltage derating minimum. Use 50% derating for critical applications where maximum reliability is required.
Is this capacitor suitable for PFC applications?
Yes, this capacitor is specifically designed for PFC output filtering. The 400V rating handles typical PFC output voltages (380-400V DC) with margin. The 470uF capacitance provides good energy storage for PFC circuits.
Ideal for PFC output filtering in power supplies up to 1kW.
What are the mounting requirements?
Snap-in mounting requires proper PCB holes sized for the terminals. Standard spacing is 7.5mm for this case size. Provide adequate copper area for heat dissipation and ensure proper clearance for the 45mm height.
Design PCB with proper hole sizes and thermal management.