Hammond 195M20 20 mH 20 A DC Single Coil Chassis Mount Choke

The 195M20 is a heavy current, chassis mount choke from the 195 Series, a single coil inductor rated 20 mH at 20 A DC. It is built for engineers and integrators designing high current power supply filters, where an open core and coil inductor bolted to a chassis or panel is the practical way to smooth DC output.

Rated 20 mH at 20 A DC, the 195M20 has 0.075 ohm resistance, Class A insulation, a 34 lb weight and 0.31 x 0.50 in (8 x 13 mm) mounting slots.

The ordering table lists dimension A at 6.00 in (152 mm), B at 7.50 in (191 mm), C at 5.00 in (127 mm), D at 5.00 in (127 mm) and E at 5.88 in (149 mm), with mounting slots (G) of 0.31 x 0.50 in (8 x 13 mm). Shipping weight is 34 lbs (15.42 kg), and the series table lists 34 lbs. Inductance is measured at the rated D.C. current, and both inductance and resistance carry a 15% tolerance.

Mounting uses a 4-slot bracket, and connections are made to a screw terminal or heavy copper tabs with holes. The 195 Series is hipot tested at 2,500 VAC with a recommended maximum operating voltage of 600 VAC (winding to core), and is rated for operation from -40C to 85C and storage from -40C to 105C. The chokes are UL approved under Type 3AH, E207860, 30V7, and the 195M20 is listed as RoHS and REACH compliant. Class a insulation is listed in the ordering table.

For AC applications from 60 Hz to 10,000 Hz, the manufacturer points to its 197 Series instead.