Mounting height is 90 mm and installation depth is 55 mm, which matches the standard SENTRON modular-device footprint. If you're swapping out an older contactor-based remote switch in a panel that was laid out for 5SL-series breakers, the 5TT5512 will drop into the same DIN slot without needing to re-drill the gland plate or re-route the wiring — the terminals land in the same plane.
Rated current holds at 16 A even at cos φ 0.6, so the inductive load capability is solid for switching contactor coils, solenoid valves, or small motor starters remotely. The control voltage is AC, and the supply frequency is 50 Hz — confirm the coil rating matches your control circuit before wiring.