The Siemens 5TT5800-6 is a SENTRON insta contactor with 2 normally open (NO) contacts, designed for switching resistive and incandescent lamp loads in DIN-rail panels. Its 230 V AC coil matches standard lighting and HVAC control circuits across 50/60 Hz installations. Rated for 20 A at 400 V AC, the 5TT5800-6 carries a switching capacity of 1 000 W for incandescent lamp loads — suitable for switching banks of tungsten lighting in commercial or industrial zones. The 2 NO contact arrangement means it closes two independent circuits on coil energisation, with zero NC contacts. At 18 mm wide (one modular width unit) and 71 mm deep, it occupies a single DIN-rail position. The manufacturer specifies that spacers must be provided between units to ensure adequate heat dissipation — a practical constraint when packing multiple contactors in a row.
The 18 mm width matches the standard modular DIN-rail footprint used across SENTRON and other 1-MW component ranges. The 90 mm height and 71 mm depth clear most standard distribution board enclosures. Supplementary devices can be installed on the contactor, allowing add-on auxiliary contact blocks or interface modules without replacing the base unit.