Hammond 195R20 50mH 20A Single-Coil Heavy Current Choke

The 195R20 is a large single-coil heavy current chassis mount choke rated 50 mH at 20 A DC. It is designed for demanding DC power supply filtering where high inductance must be maintained at 20 A.

The open core and coil construction mounts through a 4-slot bracket. The listed winding resistance is 0.13 ohms and insulation is Class B. This is a substantial part: A 9.00 in (229 mm), B 8.25 in (210 mm), C 7.50 in (191 mm), D 7.00 in (178 mm) and E 5.75 in (146 mm), with mounting slots G of 0.44 x 0.75 in (11 x 19 mm) sized for heavier hardware.

At 72 lbs (32.66 kg), per both the series table and part page, the 195R20 needs a mounting surface and handling plan suited to its mass.

Across the 195-196 Series, inductance and resistance are held to a 15% tolerance, inductance is measured at rated D.C. current, and connections are made to a screw terminal or heavy copper tabs with holes. The series is rated for operation from -40C to 85C and storage from -40C to 105C, with a recommended maximum operating voltage of 600 VAC winding to core. Chokes in the series are hipot tested at 2,500 VAC. The chokes are UL approved under Type 3AH, E207860, 30V7, and this part is listed as RoHS and REACH compliant.