KXF Ultra-Mini Aluminum Electrolytic Capacitors Chemi-Con KXF Ultra-Miniature Aluminum Electrolytic Capacitors (AECs) provide 15,000 to 20,000 hours of operation at +105°C. Chemi-Con KXF AECs offer a longer life than the KXJ series and are ideal for high-reliability applications, such as LEDs, chargers, buck-boost converters, and miniature switching power supplies. The endurance of the KXF series is boosted by a proprietary electrolyte along with aluminum foils, optimizing the internal structure. This 10mm to 18mm diameter AEC series is ideal for areas where more endurance life is required.