RNS FPCAP Aluminum Electrolytic Capacitors Nichicon RNS FPCAP Aluminum Electrolytic Capacitors use a functional polymer cathode to greatly improve frequency and temperature characteristics. Nichicon RNS Capacitors exhibit low ESR at a high frequency range, high ripple current capability, long life and high reliability. Other RNS series features include a capacitance range from 10µF to 1200µF, voltage range from 4.0VDC to 25VDC, and an operating temperature range from -55°C to +105°.