square D overload relay thermal unit B10.2 industrial motor control parts

Lot of 3 Square D motor overload thermal units model B10.2. These parts appear used and are untested from the estate of an industrial maintenance worker who collected them and probably salvaged many of them from different installations in the course of his work.

These units measure about 1 7/8" long and 1 3/8" center to center of the mounting holes.