Cornell Dubilier Aluminum Electrolytic 401C503M020AB8

The Type 401C is a low-ESR aluminum electrolytic capacitor designed for high-ripple current applications in military and industrial environments, operating from -55 °C to 105 °C. The 401C503M020AB8 variant has a capacitance of 50,000 µF, a rated voltage of 20 Vdc, and uses a case code AB measuring 1 3/8 inches in diameter by 3 1/8 inches in length. It features a maximum ESR of 15.6 mΩ at 120 Hz and 9.9 mΩ at 20 kHz, with a ripple current rating of 15.1 A at 25 °C and 16.8 A at 85 °C. The capacitor meets EIA IS-749 ripple life standards with 2,000 hours at 85 °C and undergoes a 4,000-hour life test at 105 °C. The extended cathode foil design ensures consistent thermal performance in all mounting orientations.