800VDC current-compensated ring core chokes

TDK Corporation's RoHS-compatible B82724J8*N040 series features a high rated voltage of 800VDC or 250VAC in continuous operation and was developed specifically for use as DC link chokes in frequency converters. A further advantage of the new series is its thermal behavior which means that chokes with high inductance values can be operated with high currents, even at a high operating temperature. The new chokes offer a range of inductance values extending from 0.5mH to 47mH and rated currents of between 1.6A and 10A, depending on the inductance. Their rated ambient temperature without derating is 70 °C. For the additional attenuation of symmetrical interferences, the power line chokes feature a stray inductance of around 0.5% of the rated value. The dimensions for all types are 18.5mm x 31.3mm x 33.2mm. The new ring core chokes are manufactured using a flame-retardant plastic that is compliant with UL 94 V-0 and certified in accordance with IEC 60335-1, Clause 30 (glow-wire and ball pressure test). In addition, the winding is completely potted, which allows its use in highly polluted environments. 

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