Hammond 1539M30 2500uH 2.8A Ferrite Bobbin EMI/RFI Choke

The Hammond 1539M30 is a 2500 uH RF choke from the 1539 Series of EMI/RFI chokes, described by the manufacturer as a heavy duty hash choke. It is wound on a high saturation flux density ferrite bobbin and is intended for engineers, OEM designers and repair technicians who need a through-lead inductor for filtering or energy storage duty at up to 2.8 A DC.

Electrically, the 1539M30 is specified at 2500 uH with a +/-10% tolerance, a maximum DC resistance of 0.464 ohms, a maximum DC current of 2.8 A and a minimum Fo of 0.26 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 1.21 in (31 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, 1539M30 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 1539M30 is RoHS compliant and REACH compliant.