B43501A9107M
100µF 450V aluminum electrolytic capacitor, long-life series, 10,000 hours at 105°C, for industrial power supplies.
Product Overview
Description
The B43501A9107M is a high-voltage aluminum electrolytic capacitor from TDK's long-life B43501 series. This 100µF capacitor with 450V rating is designed for demanding industrial and commercial power supply applications.
Featuring advanced electrolyte formulation and high-purity aluminum foil, this capacitor delivers 10,000 hours operational life at 105°C with rated ripple current. The robust construction includes a pressure relief vent and high-quality sealing system.
The 25mm diameter x 40mm length case size provides excellent volumetric efficiency for high-voltage filtering applications. This capacitor is ideal for PFC circuits, DC link applications, and high-voltage power supply filtering.
Product Series
B
Primary Application
PFC output filtering
Key Features
- Long life: 10,000 hours at 105°C
- High voltage rating: 450V DC
- High ripple current capability
- Low ESR for reduced heating
- Pressure relief vent for safety
- RoHS compliant
Specifications
| Capacitance | 100µF ±20% |
|---|---|
| Rated Voltage | 450V DC |
| Temperature Range | -40°C to +105°C |
| Lifetime | 10,000 hours at 105°C |
| Ripple Current | 1.2A rms @ 100Hz, 105°C |
| ESR | 1.5Ω max @ 100Hz |
| Case Size | 25mm D x 40mm L |
| Termination | Snap-in |
Applications
PFC output filtering
Electronic system design
DC link capacitors
Electronic system design
High-voltage power supplies
Electronic system design
Motor drive inverters
Motor drive and control systems
Welding equipment
Electronic system design
FAE Expert Insights
"The B43501A9107M is my standard recommendation for 380-480VAC three-phase rectifier applications. In my experience with industrial power supply designs, this capacitor offers excellent reliability and value. The 10,000-hour lifetime at 105°C provides good margin for most industrial applications when properly derated. I typically recommend operating at 80% of rated voltage (360V) which effectively doubles the expected lifetime. The 1.2A ripple current rating is adequate for PFC applications up to about 1kW. For higher power levels, consider using multiple capacitors in parallel to distribute ripple current and thermal load."
Reliable choice for industrial PFC and DC link applications with good lifetime
— David Park, BeiLuo
Frequently Asked Questions
What is the expected lifetime at different operating temperatures?
The B43501A9107M is rated for 10,000 hours at 105°C. Following the Arrhenius equation, lifetime approximately doubles for every 10°C decrease in operating temperature. Expected lifetimes: 20,000 hours at 95°C, 40,000 hours at 85°C, 80,000 hours at 75°C, and 160,000 hours at 65°C. These calculations assume rated voltage and ripple current. Voltage derating further extends lifetime - operating at 80% of rated voltage typically doubles the expected life. For example, at 85°C and 360V (80% of 450V), expected lifetime could exceed 80,000 hours. Always ensure adequate cooling and thermal management for optimal reliability.
Use temperature derating and voltage derating to maximize capacitor lifetime in your application.
How much ripple current can this capacitor handle?
The B43501A9107M has a rated ripple current of 1.2A rms at 100Hz and 105°C ambient temperature. At lower temperatures, higher ripple currents are permissible: approximately 1.5A at 85°C, 1.9A at 65°C, and 2.4A at 45°C. The ripple current rating is frequency-dependent - higher frequencies allow increased ripple current due to reduced ESR. At 10kHz, the ripple current capability is approximately 1.8x the 100Hz rating. Exceeding the ripple current rating causes internal heating, accelerating electrolyte evaporation and reducing lifetime. Always calculate expected ripple current and ensure adequate thermal management.
Calculate expected ripple current and verify thermal design for reliable long-term operation.
What is the leakage current specification?
The maximum leakage current for the B43501A9107M is specified as 0.01CV or 3µA, whichever is greater, measured after 5 minutes at rated voltage. For this 100µF 450V capacitor: 0.01 × 100µF × 450V = 450µA maximum leakage current. Typical leakage current is much lower, often below 100µA at 25°C. Leakage current increases with temperature - approximately doubling for every 10°C rise. At maximum rated temperature (105°C), leakage current may approach the maximum specification. High leakage current indicates capacitor aging or damage. For safety-critical applications, monitor leakage current during periodic maintenance.
Measure leakage current during system testing and maintenance to monitor capacitor health.
Can this capacitor be used in series for higher voltage?
Yes, aluminum electrolytic capacitors can be connected in series to achieve higher voltage ratings, but this requires careful consideration. When connecting in series, voltage balancing resistors must be used to ensure equal voltage distribution, as capacitor characteristics vary with temperature and aging. The balancing resistors should allow a current of 10-20 times the expected leakage current. For two 450V capacitors in series, the combination can theoretically handle 900V, but practical designs should limit to 800V (approximately 89% of theoretical) to account for imbalance. Series connection also reduces effective capacitance by half (for two identical capacitors). Consider using higher voltage rated capacitors instead if available.
Use voltage balancing resistors and derate the series combination for reliable high-voltage operation.
What mounting orientation is recommended?
The B43501A9107M snap-in capacitor can be mounted in any orientation - vertical (terminals up), horizontal, or inverted (terminals down). However, for optimal performance and reliability, vertical mounting with the terminals facing upward is generally recommended. This orientation allows any gas generated during operation to vent through the pressure relief vent at the top of the capacitor. Horizontal mounting is acceptable but may slightly reduce the effective ripple current capability due to altered thermal convection. Inverted mounting (terminals down) is generally not recommended for long-life applications as it may affect the electrolyte distribution over time. Always ensure adequate clearance for the pressure relief vent.
Mount vertically with terminals up for optimal reliability; ensure adequate clearance for pressure relief vent.