UCY2G220MPD
UCY series high-voltage capacitor with 22uF 400V for input filtering and PFC applications.
Product Overview
Description
The UCY2G220MPD is a high-voltage aluminum electrolytic capacitor from Nichicon's UCY series, designed for demanding input filtering and power factor correction (PFC) applications. With 22uF capacitance and 400V voltage rating, this capacitor is ideal for AC-DC power supplies and industrial equipment.
Featuring Nichicon's high-voltage electrolyte technology and thick aluminum oxide dielectric, the UCY2G220MPD delivers reliable performance in high-voltage environments. The capacitor offers excellent surge voltage capability (up to 450V) and low leakage current for safety-critical applications.
This capacitor is rated for 8,000 hours at 105°C and features a wide operating temperature range of -25°C to +105°C. The 10mm diameter × 20mm height radial lead package is compatible with standard through-hole assembly processes.
Product Series
UCY
Primary Application
AC-DC power supply input filters
Key Features
- High voltage rating up to 400V DC
- Excellent surge voltage capability (450V)
- Low leakage current for safety applications
- 8,000 hour lifetime at rated temperature
- Wide temperature range -25°C to +105°C
- Compact 10mm × 20mm package
- RoHS compliant and halogen-free
Specifications
| Capacitance | 22uF ±20% |
|---|---|
| Voltage Rating | 400V DC |
| Temperature Range | -25°C to +105°C |
| Ripple Current | 0.45A @ 120Hz |
| ESR | 8.5Ω @ 120Hz |
| Lifetime | 8000 hours @ 105°C |
| Termination | Radial Lead |
| Package | 10mm × 20mm |
| Qualification | Industrial Grade |
| Specifications | High Voltage, Low Leakage |
Applications
AC-DC power supply input filters
Power conversion and supply
Power factor correction (PFC) circuits
Electronic system design
Industrial control equipment
Industrial automation and control
LED lighting drivers
Motor drive and control systems
Medical power supplies
Medical electronics
Renewable energy inverters
Renewable energy systems
FAE Expert Insights
"The UCY2G220MPD is my preferred choice for 400V PFC output applications in the 100-300W power range. The 22uF capacitance provides adequate energy storage while maintaining reasonable physical size. What sets this capacitor apart is its excellent surge voltage capability - I've seen it withstand repeated 450V transients without degradation. The low leakage current is particularly important for medical and safety-critical applications. I always recommend at least 20% voltage derating (operating at 320V or less) to maximize lifetime. For high-temperature applications, consider the UCY series with 125°C rating. The reliability track record of this series in industrial applications is outstanding."
Reliable high-voltage performance for demanding AC-DC applications
— Sarah Wang, Senior FAE, BeiLuo
Frequently Asked Questions
What is the recommended voltage derating for UCY2G220MPD in PFC applications?
For PFC applications, I recommend operating UCY2G220MPD at no more than 80% of its 400V rating (320V maximum) under steady-state conditions. This 20% derating provides: 1) Extended lifetime - operating at 320V instead of 400V can increase lifetime by 2-3x, 2) Margin for line transients - PFC output can see voltage spikes during load dumps or line swells, 3) Safety margin for component variations - actual bus voltage may exceed nominal due to tolerance stack-up. For universal input PFC (90-264VAC), the maximum output is approximately 380VDC, so 400V rating provides minimal margin. Consider using 450V rated capacitors for universal input applications or implement overvoltage protection.
Use 20% voltage derating minimum; consider 450V capacitors for universal input PFC without OVP.
How do I calculate the required capacitance for PFC output filtering?
PFC output capacitance is determined by hold-up time and ripple voltage requirements: 1) For hold-up time: C = (2 × P × t_holdup) / (V_nom² - V_min²), where P is power, t_holdup is required hold time, V_nom is nominal voltage, V_min is minimum allowable voltage. Example: 200W supply, 20ms holdup, 380V to 300V: C = (2 × 200 × 0.02) / (380² - 300²) = 8 / 54,400 = 147uF. 2) For ripple voltage: C = I_ripple / (2 × π × f × V_ripple), where I_ripple is load current, f is ripple frequency (2× line frequency for PFC), V_ripple is allowable ripple. Example: 200W at 380V = 0.53A, 120Hz ripple, 10V ripple: C = 0.53 / (2 × π × 120 × 10) = 70uF. Select the larger value and add 20-30% margin.
Calculate based on both hold-up and ripple requirements, then select larger value with margin.