The Crouzet DIRT Series is only for mounting on DIN-rail. Even though the equivalent Macromatic CAP Series is a plug-in design, the Macromatic 70170-D 11 pin socket recommended for the CAP Series can be mounted on 35mm DIN track as well as panel-mounted with two screws. In addition, the ts adjustment knob is on the top of the Macromatic product for easier access vs. on the side of the Crouzet product.