Small X1 capacitors for demanding automotive and industrial applications

TDK Corporation has released the X1 capacitors of the EPCOS B3291xH/J4 series for power line filtering of EMI in demanding automotive and industrial applications with a rated AC voltage of up to 480V. Applications exposed to harsh climatic conditions, such as PV inverters and EV OBCs, can benefit from the new X1 capacitors’ high resistance to high humidity environments. With the ability to continuously handle a DC voltage of 1000V, this series is a dedicated solution for DC EMC of high-voltage EV platforms.

The X1 capacitors are THB-tested (temperature, humidity, bias) at +85C, 85% relative humidity for 1000 hours at 380VAC and 1000VDC, and they can operate at temperatures up to +110C.

Featuring self-healing properties, the series covers capacitance values from 15nF to 10µF and boasts a compact design, with dimensions ranging from 18mm x 10.5mm x 5mm to 57.5mm x 57mm x 45mm, depending on the capacitance. Lead spacings vary between 15mm and 52.5mm, with the largest versions equipped with four pins for enhanced mechanical stability on the PCB. The series is certified according to ENEC, UL, and CSA standards.