New-Tech Europe Magazine | Q3 2020

is often used in performance-critical electronic devices found in military and aerospace systems. That said, the versatility of filter inserts is enough to bridge almost any connection where EMI/RFI is problematic, such as medical equipment or transportation products too. When speaking of EMI filtering performance, attenuation is the key metric. Utilizing the attenuation charts for various capacitances under a 50ohm load, such as those seen in Figure 3, the EESeal can mitigate frequencies from 10KHz to 40GHz. Chip capacitors range from 1pf up to 4.7uF These C-filter devices give a peak attenuation of approximately 40 to 45 dB at the peak frequency. Customization Every EESeal filter insert is custom designed which will ensure it meets your application’s specific EMI/EMC requirements. In order for us to issue a quote, and to ship you a free of charge sample for testing purposes, we simply need the answer to the four questions below. What is your complete connector part number? Where are your EMI issues (scans are helpful)? What are the voltages on each pin? What are the maximum data rates on each pin? (e.g., RS232, Ethernet, video, etc.) Further, if there are any special requirements such as meeting lightning specifications, we ask for the lightning pulse requirement such as found in DO-160 section 22 or MIL- STD 461G, CS117. CONCLUSION While filter inserts have been known as last-minute fixes for failed EMI tests, many designers are now using EESeals in their early designs. Some of the largest manufacturers in the world are now enjoying EMI/RFI

Figure 2

For more information, or to request a sample for your application please contact Powell Electronics EMI/Filter

filtration and transient protection without sacrificing space or weight. Integrating the EMI filtering solution into the connector allows room for other components or even further shrinking of the system itself. Quell’s EESeal, can match and even exceed the performance of a traditional filtered connector while providing significant, tangible space, weight, and cost-saving benefits.

Specialist – Andy Brayford Global Applications Manager Mob: +44 (0)7554 363639

Figure 3

28 l New-Tech Magazine Europe