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New non-magnetic SMT tantalum capacitors: Sampling Now

New non-magnetic versions of popular surface-mount MnO2 or polymer tantalum capacitors, from Kemet and Charcroft, feature extremely low magnetic permeability, down to 1.00001µ.

The new capacitors increase resolution and reliability for next generation MRI scanners, with magnetic fields up to 3.0T, or other high-resolution scanning technologies.

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The non-magnetic versions increase the reliability of high-resolution medical imaging equipment by minimising overheating due to magnetic losses, and are available with 100% tin (Sn) or tin/lead (SnPb) leads. Non-magnetic versions are specified by adding the appropriate lead-material code to the existing KEMET part numbers.

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Data

DielectricSeriesCapacitanceVoltage (VDC)ESR
MnO2T491 Industrial-grade, low-profile

T493 COTS mil-aero (CWR11 style)

T494 Low ESR industrial

T495 Surge-robust low ESR
0.1µF - 1000µF

0.1µF - 330µF

0.1µF - 1000µF

0.1µF - 1000µF
2.5 - 50V

4 - 50V

2.5 - 50V

2.5 - 50V
0.2 - 25Ω

0.1 - 14Ω

0.15 - 20Ω

50 - 1800mΩ
PolymerT520 Polymer capacitor

T521 High-voltage polymer
15µF - 68µF

22-330µF
16 - 35V

16 - 35V
55 - 125mΩ

25-125mΩ

Author
Charcroft Electronics Ltd

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