Chip ferrite beads focus on EV market

Murata has introduced the BLE32SN series of chip ferrite beads, describing them as the world’s first chip-type noise suppression components to have 20A current rating.

They will be used to provide noise suppression in circuits with large current flows, such as the battery charging systems and powertrains of electric vehicles (EVs), as well as in industrial equipment.

According to Murata, no chip-type noise suppression filter could attain a 20A current rating until now. Engineers had to mount multiple chips in parallel, which added to the bill of materials (BoM) costs as well as occupying valuable board real estate. Murata said its BLE32SN series means fewer chips will be required, a small number of chips will be required, compared to using standard 10A-rated noise suppression chips, to not only save space but reduce weight in the end product.

The beads use advanced structural simulation techniques, revealed Murata in a proprietary internal electrode design. This increases the electrode volume of the chips compared with those using a conventional arrangement. It has resulted in a significant lowering of their DC resistance characteristics. Consequently, heat generation is reduced, so less thermal management is needed – allowing further cost and weight savings.

Murata’s BLE32SN series ferrite beads are compact with dimensions of 3.2 x 2.5 x 2.0mm. They are capable of supporting an operational temperature range of -55 to +125 degrees C or -55 to +150 degrees C, depending on customers’ application requirements.

Murata manufactures electronic components, modules and devices. Its portfolio includes ceramic capacitors, resistors / thermistors, inductors / chokes, timing devices, buzzers, sensors and EMI suppression filters. In addition to being a  ceramic capacitor manufacturer, Murata also claims to be a world leader in Bluetooth and WiFi modules, board-mount DC/DC converters and a key manufacturer of standard and custom AC/DC power supplies.

Established in 1944, Murata is headquartered in Japan and has European offices in Finland, France, Germany, Hungary, Italy, the Netherlands, Spain, Switzerland and the UK.

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