An example of one of AVX’s T4Z series medical-grade solid tantalum capacitors. [Image courtesy of AVX]
The T4Z series is designed to replace commercial capacitors in the filtering, hold-up, and charging circuits of non-critical medical devices, according to Fountain Inn, S.C.–based AVX. Devices ranging from neurostimulators to patient monitoring and diagnostic equipment require high-reliability and strict change control, the company said.
The new T4Z Medical Series solid tantalum capacitors are based on a MIL-PRF-55365 product line going back 25 years in the medical industry. AVX makes the capacitors at its ISO-13485-certified plant in Biddeford, Maine — under manufacturing control, statistical screening and testing procedures compliant with FDA regulations for medical devices.
T4Z Medical Series capacitors offer low DC leakage values: 0.01 CV standard, with custom potential down to 0.005 CV — about half that of typical industry limits. The low DC leakage values enable longer lifetime performance and improved reliability compared to commercial tantalum capacitors, according to AVX.
The T4Z capacitors are presently available in eight compact, lightweight case sizes ranging from 2.54 mm x 1.27 mm x 1.27 mm (L x W x H) ±0.38 mm, and 0.016 g to 7.24 mm x 3.81 mm x 2.79 mm ±0.38 mm and 0.335 g with solder-plated, solder-fused, gold-plated, or 100% tin terminations. They offer capacitance values extending from 0.1 μF to 330 μF, eight standard voltage ratings spanning 4–50 V, and rated operating temperatures extending from -55 °C to +125 °C. AVX said custom DCL and ESR values are available upon request.
