Hammond 1539M28 500uH 6.5A Ferrite Bobbin EMI/RFI Choke

1539M28 is a heavy duty hash choke in Hammond's 1539 Series EMI/RFI line, offering 500 uH of inductance with a 6.5 A maximum DC current rating. Built on a high saturation flux density ferrite bobbin, it suits OEM engineers and technicians designing power-line filters, noise suppression stages or energy storage inductors.

Electrically, the 1539M28 is specified at 500 uH with a +/-10% tolerance, a maximum DC resistance of 0.085 ohms, a maximum DC current of 6.5 A and a minimum Fo of 0.7 MHz. Inductance is measured at 1 kHz with 0 A DC current, and the typical inductance change is less than 5% at twice rated current, so the part holds its value well under DC bias.

The part occupies a 1.50 x 1.50 in maximum envelope (Dimension A 1.50 in (38 mm), Dimension B 1.50 in (38 mm)), with a typical Dimension C of 1.06 in (27 mm) and a typical Dimension D of 0.05 in (1 mm). It ships at 0.3 lbs (0.14 kg). Within the 1539 Series parts sharing this 1.50 x 1.50 in body, 1539M28 carries a mid-range inductance value, with siblings spanning 100 to 10000 uH.

Connections are made through 1 in long leads, tinned to within 1/8 in of the body, ready for soldering. The 1539M28 is RoHS compliant and REACH compliant.