That 25 A AC rating covers resistive and moderate inductive loads in a 2-module-width (35 mm) DIN-rail footprint — common for lighting, heating, or small motor switching in distribution panels.
At 35 mm wide (2 modular units) and 71 mm deep, this contactor fits standard DIN-rail enclosures. The manufacturer notes that spacers are required between units for proper heat dissipation — a detail that matters when packing multiple contactors in a row. IP20 protection means it's intended for enclosed panel mounting, not washdown or outdoor exposure.