RR7 FPCAP Aluminum Electrolytic Capacitors Nichicon RR7 FPCAP Aluminum Electrolytic Capacitors use a Functional Polymer Cathode, which greatly improves the capacitor's temperature and frequency characteristics. Nichicon RR7 Capacitors offer low ESR (7mΩ) at high frequency range, high ripple current capability, long life, and high reliability. Additional features of this ultra-low ESR capacitor are capacitance range from 68µF to 1500µF, voltage range from 2.5VDC to 16VDC, and an operating temperature range from -55°C to +105°C.