New polymer capacitors provide long lifetime and low ESR

Panasonic has introduced the TX, TZ, JZ and KZ series to its SP-Cap family of surface-mount, chip-style conductive polymer aluminum electrolytic capacitors, which feature a long operating lifetime in harsh conditions and very low ESR. The new capacitors join the existing JX and KX series in the SP-Cap family. 

The very low ESR values of SP-Cap capacitors means that they are mainly used as input and output capacitors in dc-dc converters.

The new TX and TZ series are for use in applications exposed to very high temperatures: they can operate for up to 5,500 hours at a temperature of 135°C. The low profile of 1.9 mm means that the capacitors can be mounted close to a heat-sink.

The maximum capacitance of the KX and TX series is 470 μF, while that of the JZ, KZ and TZ capacitors is 560 μF. All the reliable SP-Cap capacitors provide ultra-low ESR values as low as 3 mΩ.

The JZ and KZ capacitors are also robust, but are for use in less harsh environments: the JZ series is rated for 3,000 hours at 125°C, and the KZ series for 5,500 hours at 125°C. 

The SP-Cap capacitors also withstand operation in humid environments: rated lifetime is 1,000 hours at 85°C and 85% relative humidity.