Insta Contactor for Lighting and Resistive Loads
The Siemens 5TT5800-8 is a SENTRON Insta contactor designed for switching incandescent lamp loads up to 1,000 W at 230 V AC, making it a direct fit for lighting panel applications where a compact, modular contactor is needed. It provides 2 normally open (NO) contacts with no NC contacts, so the switching path is dedicated to making and breaking the load circuit — not for auxiliary interlocking or feedback. The coil is rated 24 V AC, matching standard building automation control voltages. The operating voltage is 230 V AC, meaning the main contacts are rated for 230 V line voltage, typical for single-phase lighting circuits in commercial and residential panels.
Panel Fit and Thermal Management
At 18 mm width (1 modular width unit), this contactor snaps onto a DIN rail and occupies a single 18 mm slot in a distribution board — important for dense lighting contactor banks where every millimeter of rail space counts. Depth is 71 mm and height is 90 mm, so it fits standard shallow enclosures. The installation note requires spacers between units for heat dissipation — the per-pole power loss is 1.7 W at rated current in hot operating state, so grouping multiple contactors without airflow gaps can raise internal cabinet temperature above the contactor's thermal limits. IP20 protection means it is touch-safe against finger contact but not sealed against moisture or dust ingress — suitable for indoor panel mounting only, not washdown or outdoor environments.
Sourcing and Lifecycle
Supplementary devices can be installed (the product extension flag is Yes), so add-on blocks like auxiliary contact modules or time-delay relays can be snapped on without replacing the base contactor — useful for field modifications or phased builds.