EMI

BLM15VM is an automotive ferrite beads inductor intended to block frequencies around 5.9GHz. Announced by Murata, it is particularly intended for 5G vehicle-to-everything (5G-V2X) applications. “In recent years, the use of high-frequency wireless communication in the automotive sector has increased.,” according to the company. “It is primarily used for content distribution for navigation, audio and other infotainment systems. Improving sensitivity ...

Bourns has created a series of low-profile surface-mount common-mode choke line filters. Called SRF0502, they stand 2.5mm tall and have a 5 x 5mm footprint. It “latest line filter series features a shielded construction that helps to minimise EMI while delivering low dc resistance, current rating up to 5A and a frequency range up to 700 MHz”, said the company. ...

Würth Elektronik has created a sticky-back tape that blocks or absorbs electric and magnetic fields across 100Hz to 25GHz. Called WE-EMIP EMI absorber sheet, is only 72μm thick and consists of a layer of aluminium, a magnetic absorber layer (100μ0 permeability at 1MHz) and a polymer carrier layer. “It offers attenuation exceeding 40dB over a wide frequency range,” according to ...

Schaffner has added nanocrystalline core versions of its ~65mm diameter RT common-mode choke series. Identified by part numbers of the form RT8xx1, they come in a choice of horizontal or vertical core orientation (see image) with two or three windings for single or three-phase power, as well as dc. “Based on nanocrystalline core technology, the series achieves up to 15dB ...

Today’s multi-functional devices mean that a designer has to consider many factors when integrating electrical grounding in often limited spaces, advises Jesse Hagar. Not so long ago there was only one reason to think about electrical grounding: safety. Protecting people from electrical shocks remains a paramount objective, but modern consumer electronics equipped with multimedia and communications capabilities means that developing ...

Spectrum Control has introduced a family of modular power EMI filters for designs meeting MIL-STD-461. 52F1825 filters operate across -55° to 75°C and the “rugged design includes a convenient, environmentally sealed input interface that withstands moisture, dust, and other contaminants to ensure durability and longevity”, according to the company. The models come with a 89 x 127mm footprint in a ...

Cornell Dubilier Electronics is aiming at harsh environments with a series of X2, EMI-RFI suppression capacitors. “The MXH series is AEC-Q200 qualified and has been temperature, humidity and bias (THB) life tested. “The 2,000-hour test conducted at 85°C, 85% relative humidity at rated voltage subjected these components to twice the standard test hours required to meet IEC 60834, Class III-B ...

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, ...

Toyochem  has created a series of flexible conductive and insulating sheet films for the protection of electrical and electronic equipment, including EMC protection. Branded Liotelant “the sheet films exhibit high water-resistance and are highly flexible, with an elongation of 500%”, according to the company. The “films can be hot-press moulded on to the electromagnetic interference source on the PCB, thus ...

Electrically conductive gaskets improve the EMI shielding of metal and metallised enclosures, says Gerard Young, of Parker Hannifin. These connections are primarily RF bonds and not electrical safety connections designed to carry high currents in the case of a short or malfunction. They may also provide part of the lighting strike (LS/EMP) protection of an aircraft, although this is very ...