Hammond 197C25 1.4 mH 25 A High Frequency Reactor, Screw Terminals

The Hammond 197C25 is a 197 Series high frequency reactor rated 1.4 mH at 25 A DC, intended for high frequency filtering applications operating from 60 Hz to 10 kHz. It is aimed at power electronics designers, OEM engineers and panel builders who need an inductor with a high self-resonant frequency for AC filter and choke positions.

Carrying 25 A DC at 1.4 mH, the 197C25 is housed in the 6.40 in x 6.10 in x 4.38 in frame, with a 30 mOhm DC resistance and a 272.3 kHz self-resonant frequency.

Typical electrical values from the drawing: inductance with bias of 1.4mH ±15% @ 25ADC, self-resonant frequency of 272.3 kHz, impedance at SRF of 12.27K Ohms, ripple current of 20% peak-to-peak, DC resistance of 30 mOhm ±15% at 20°C, dielectric strength of 2500V RMS and a temperature range of -40 to 105°C.

The reactor is wound on a carbonyl iron powder core, described on the drawing as a high permeability core ideal for applications below 50 kHz, and uses rugged construction with an aluminum base and stainless steel band plus open-style screw terminals for maximum versatility. Size A x B x C is 6.4 in x 6.1 in x 4.38 in (163 mm x 155 mm x 111 mm), with a 5.00 in (127 mm) x 3.50 in (89 mm) mounting hole pattern. The drawing lists the weight as 16 lbs, and the shipping weight is 16 lbs (7.26 kg). Dimensional tolerance is ±0.063 in.

The 197C25 is REACH and RoHS compliant and is marked Made in Canada. Performance graphs for inductance versus DC bias current and quality factor were taken at 1.0 volt AC drive; results are typical and subject to normal manufacturing and electrical tolerances. For DC applications the series literature points to the 195-196 Series.