Cornell Dubilier Aluminum Electrolytic 401C424M7R5BD8

The Type 401C is a low-ESR aluminum electrolytic capacitor designed for high-ripple current applications in military and industrial systems requiring reliable performance from -55 °C to +105 °C. The 401C424M7R5BD8 variant has a capacitance of 420,000 µF, a rated voltage of 7.5 Vdc, a maximum ESR of 3.9 mΩ at 20 kHz, and a ripple current rating of 33.4 A at 85 °C. It is mounted in a case code BD measuring 2.00 inches in diameter and 4.75 inches in length, with a bare can terminal. The capacitor complies with EIA IS-749 for a 2,000-hour life test at 85 °C and meets a 4,000-hour life test at 105 °C with rated voltage. Capacitance tolerance is ±20%, and the extended cathode construction ensures effective heat dissipation in all mounting orientations.