Similar electro-couplers used for Lionel and Lionel TMCC conversions operate at a higher voltage. Most of the ERR and other TMCC conversions provided access to couplers. There were different lengths of couplers for the different conversions. This is an older Atlas SW9 that I upgraded, it did not have electro-couplers. Atlas is another source for coupler parts. Pictured is an Atlas articulated coupler, that flexes/pivots, two points, which allows better operation on tight curves.
I had used part of an Atlas coupler on a Rich Yoder 44 tonner. The frame mounting of the existing coupler and unusual drive system made electro-couplers on this small switcher model difficult.
Note the length of the coupler beyond the model. The small plastic sleeve over the coupler electro-coil is an Atlas part.
The mechanical thumbtack coupler was shorter.
