EEUFR1E101
100uF 25V aluminum electrolytic capacitor, FR series, low impedance, 105C rated, 6.3x11mm radial lead.
Product Overview
Description
The EEUFR1E101 is a high-performance aluminum electrolytic capacitor from Panasonic's FR series, designed for applications requiring low impedance and high ripple current capability. This 100uF capacitor with 25V rating is ideal for switching power supply output filtering and DC bus applications.
Featuring Panasonic's advanced low-impedance electrolyte formulation, this capacitor delivers excellent ripple current handling with reduced self-heating. The robust construction includes a pressure relief vent and high-quality rubber seal for long-term reliability.
The compact 6.3mm diameter x 11mm length case size enables high-density PCB layouts while providing adequate thermal performance. This capacitor is RoHS compliant and suitable for consumer electronics, industrial controls, and power supply applications.
Product Series
EEUFR
Primary Application
Switching power supply output filtering
Key Features
- Low impedance for high ripple current
- High reliability construction
- RoHS compliant and halogen-free
- Pressure relief vent for safety
- Wide temperature range -55C to +105C
- Compact radial lead package
Specifications
| Capacitance | 100uF plus or minus 20% |
|---|---|
| Rated Voltage | 25V DC |
| Temperature Range | -55C to +105C |
| Lifetime | 5000 hours at 105C |
| Ripple Current | 0.24A rms at 105C, 100kHz |
| ESR | 0.60 ohm max at 20C, 100kHz |
| Impedance | 0.80 ohm max at 20C, 100kHz |
| Case Size | 6.3mm D x 11mm L |
| Lead Spacing | 2.5mm |
Applications
Switching power supply output filtering
Power conversion and supply
DC-DC converter input/output
Power conversion and supply
Motor drive power supplies
Motor drive and control systems
LED driver circuits
Motor drive and control systems
Industrial control systems
Industrial automation and control
FAE Expert Insights
"In my experience supporting power supply designs, the EEUFR1E101 is an excellent choice for low-voltage DC-DC converters and small switching power supplies. The FR series' low impedance characteristic significantly reduces output voltage ripple compared to standard series capacitors. I frequently recommend this part for 12V to 24V rail filtering where space is limited but performance cannot be compromised. The 6.3x11mm size offers good manufacturability while the 0.24A ripple current rating handles moderate load currents effectively. I typically recommend operating at 70-80% of rated voltage to maximize lifetime. For high-frequency switching applications above 100kHz, the low ESR of the FR series provides superior filtering performance."
Excellent low-impedance performance for compact power supply designs
— Michael Chen, BeiLuo
Frequently Asked Questions
What is the expected lifetime at different operating temperatures?
The EEUFR1E101 is rated for 5000 hours at 105C. Following the Arrhenius equation, lifetime approximately doubles for every 10C decrease in temperature. Expected lifetimes: 10000 hours at 95C, 20000 hours at 85C, 40000 hours at 75C, and 80000 hours at 65C. These calculations assume rated voltage and ripple current. Voltage derating further extends lifetime - operating at 80% of rated voltage (20V) typically doubles the expected life. For example, at 85C and 20V, expected lifetime could exceed 40000 hours. For maximum reliability, design for at least 2x the required service life.
Use temperature and voltage derating to maximize capacitor lifetime in your application.
How much ripple current can this capacitor handle?
The EEUFR1E101 has a rated ripple current of 0.24A rms at 100kHz and 105C ambient temperature. At lower temperatures, higher ripple currents are permissible: approximately 0.30A at 85C, 0.38A at 65C, and 0.48A at 45C. The ripple current rating is frequency-dependent - higher frequencies allow increased ripple current due to reduced effective impedance. At 10kHz, the rating is approximately 0.18A. Exceeding the ripple current rating causes internal heating, accelerating electrolyte evaporation and reducing lifetime. Always calculate expected ripple current and ensure adequate thermal management with proper airflow.
Calculate expected ripple current and verify thermal design for reliable long-term operation.
What is the ESR of this capacitor?
The EEUFR1E101 has a maximum ESR of 0.60 ohm at 20C and 100kHz. ESR varies with temperature and frequency. At -40C, ESR can be 3-5 times higher than at room temperature. At 105C, ESR is typically 20-30% lower than at 20C. ESR also decreases with increasing frequency - at 10kHz, ESR is approximately 2-3 times higher than at 100kHz. For switching power supply applications, the ESR at the switching frequency is critical for calculating output voltage ripple and capacitor heating. Lower ESR results in less heating and better filtering performance. The FR series is specifically designed for low ESR.
Consider ESR at your operating frequency and temperature when calculating ripple voltage and thermal performance.
Can this capacitor be used in parallel with others?
Yes, connecting multiple capacitors in parallel is a common practice to increase total capacitance and reduce equivalent ESR. When paralleling capacitors of the same value, the total capacitance is the sum of individual capacitances, and ESR is reduced proportionally. For best results, use identical part numbers and place capacitors close together with symmetrical PCB layout. Two EEUFR1E101 in parallel provide 200uF total capacitance with ESR reduced to approximately 0.30 ohm. Current sharing is naturally balanced when using identical capacitors. Parallel configuration is often more cost-effective than selecting a single larger capacitor.
Parallel multiple capacitors for increased capacitance and reduced ESR; use symmetrical layout for current sharing.
What is the leakage current specification?
The maximum leakage current for the EEUFR1E101 is specified as 0.01CV or 3uA, whichever is greater, measured after 2 minutes at rated voltage. For this 100uF 25V capacitor: 0.01 x 100uF x 25V = 25uA maximum leakage current. Typical leakage current is much lower, often below 10uA at 25C. Leakage current increases with temperature - approximately doubling for every 10C rise. At maximum rated temperature (105C), leakage current may approach the maximum specification. High leakage current indicates capacitor aging or damage. For most applications, leakage current is negligible and does not affect circuit performance.
Measure leakage current during system testing to monitor capacitor health over time.
What is the recommended soldering profile?
Panasonic recommends standard lead-free wave soldering or hand soldering for radial lead capacitors. For hand soldering, use a temperature-controlled iron set to 350C maximum with contact time limited to 3-5 seconds per lead. Excessive heat or prolonged soldering can cause thermal shock and damage the capacitor. Always ensure proper heat sinking of leads during soldering by using a heatsink clip or tweezers. After soldering, allow the capacitor to cool naturally without forced cooling to prevent thermal stress. For wave soldering, follow standard profiles with preheating to avoid thermal shock. Do not wash capacitors with halogenated solvents.
Follow recommended soldering profiles and avoid exceeding temperature limits to prevent thermal damage.