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Panel mount capacitors and EMI filters
More informations
The feed-through capacitors or by-pass capacitors as well as EMI filters are used for the passage of power supply through a chassis or metal can (boxes) in order to filter out any RF noise that may cause problems if it arrives to the electronic circuit. They are also useful to not radiate RF signals outside the box that could cause interference with other external circuits.
These pass-through capacitors should not be confused with the RF pass-through zero capacity.
Bypass stand-off capacitors are not like feed-through that filter through a panel, they are a ground bypass used as support, they are mounted with a nut fixed on the panel, one end of the capacitor is connected to ground and the other is the connection lead.
RF ATTENUATION COMPARISON DIAGRAM OF SOME EMI FILTERS
We tested in our laboratory the real attenuation of some EMI filters from 9 KHz to 1 GHz, as it is clearly seen from the diagram the attenuation is remarkable. What distinguishes them from ordinary by-pass capacitors is the attenuation value that is high even at low/mid frequencies.
Tusonix 2499-003-X7R0-101M
Tusonix 2452-000-X7R0-101M
CORRY Micronics FT24-01-102P
Vishay Draloric DDML 0312
Vishay Draloric DUML 0312
Tusonix 2450-001-X5U0-102P
Tusonix 2463-002-X5U0-152PLF
Tusonix
- N
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1.5 nF
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300 V
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12 A
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solder
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feed-through
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C
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3.5 mm
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lead
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lead
Spectrum Control Inc. 54803004X5V102P
API Technologies 54794002X5V102P
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