Compact safety-certified MLCCs for fast-charging EVs

TTI IP&E – Europe has introduced a new range of MLCCs from Murata. The EVA series possesses qualities that will be particularly desirable to engineers developing next-generation EVs. Automotive powertrain applications include the OBC, BMS, inverters, DC-DC converters, and other industrial, consumer and medical implementations.

Developed in accordance with IEC60384-14 safety standards, the safety-certified Y2 class MLCCs are particularly effective at suppressing common mode noise. Housed in surface-mount packages, with a 12.7mm x 6mm footprint and 3.7mm profile, these compact parts offer 305VAC/1500VDC voltage ratings and support 10mm creepage distances. As a result, they can satisfy the increased isolation needed by the industry’s migration to 800V powertrains for faster charging capabilities while remaining consistent with the demand for miniaturisation and weight reduction.

The series provides capacitance values ranging from 0.1nF to 4.7nF and, with an extended -55C to +125C operating temperature range, is AEC-Q200 qualified. Providing a greater safety margin, the MLCCs are tested to elevated withstand voltages of 2000VAC/60s and 4000VDC/60s to accommodate transient overvoltages, such as voltage surges and switching transients. Also, the parts exhibit low ESL, making them ideal for use at high frequencies. The metal terminal arrangement of these MLCCs provides greater elasticity, mitigating the formation of solder and deflection cracks, thereby assuring long-term reliability.

“As EV powertrains move to higher voltages, longer creepage distances are now being mandated for use in automotive powertrains. At the same time, these parts must take up less physical space,” explains Felix Corbett, director of Supplier Marketing, Passives and Discrete Components, TTI, Inc. – Europe. “Drawing on Murata’s advanced resin moulding capabilities, the EVA series of MLCCs exceeds these requirements, combining extended creepage with compactness.”