Cornell Dubilier's 300R series capacitors are wide-temperature, low-ESR capacitors ideal for power-supply outputs and UPS battery stiffening. Their exceptionally low ESRs enable high ripple-current capability, often replacing multiple standard capacitors. Available in various configurations (300, 301, 300R, 301R), these capacitors offer rugged, reverse-proof mounting and extended lifespan. They are commonly used in switching power supplies, battery backup systems, and other applications requiring high capacitance and low ESR.