News

Jul 21, 2023

EMI back

Harwin has created a range of retro-fittable 360° anti-interference back-shells for its Kona high-power connector series. “These back-shells will prevent unwanted EMI leaking out from the

Harwin has created a range of retro-fittable 360° anti-interference back-shells for its Kona high-power connector series.

“These back-shells will prevent unwanted EMI leaking out from the connector-cable assembly into the surrounding system,” according to the company. “The two-part construction of the Kona backshells enables engineers to up-grade their existing cable assemblies with 360° EMC shielding.”

Kona connectors come in 2, 3 and 4 contact versions with an 8.5mm pitch, and can carry up to 60A per contact. As well as cable end versions, board and panel-mount versions are available – the latter allowing complete shielding with metal enclosures.

Cable end shell types are designed to accommodate flexible metal braiding (left), and are supplied with tie-bands to attach the braiding to the shell, and the back-shells install with simple tools.

Construction is 6061 aluminium aerospace alloy, nickel-plated for corrosion protection.

Use is foreseen in space, unmanned aerial vehicles, robotics and electric vehicles.

“In situations where power connectors are situated near a dc-dc converter, such as in vehicle charging infrastructure, the high currents being transported can cause distortion waves that will place stress on the converter,” said Harwin v-p of products Ryan Smart. “By having a back-shell shielding option we’ve added an offering that can address problems of this kind.”

Kona connectors have 2mΩmax contact resistance and are rated for 250 mating cycles and 1.5k dc (or peak ac) at sea level. Max voltage is 3kVac (1minute), or 500Vac at 70,000ft (21km/44mbar).

Harwin products are manufactured in the company’s facility in Portsmouth, England.

See the back-shells in this Kona series overview