Siemens SENTRON 5TT5830-8 Insta Contactor — 4 NO, 24 V AC Coil
The Siemens SENTRON 5TT5830-8 is an Insta contactor with 4 normally open (NO) contacts and zero NC contacts, designed for switching loads on 230 V AC or 400 V AC circuits up to 25 A. The coil is rated 24 V AC, making it suitable for building automation and lighting control panels where a low-voltage control signal drives higher-power AC loads. The contactor occupies 2 modular width units (36 mm) on a DIN rail, with a depth of 71 mm and height of 90 mm — a compact footprint for high-density panel layouts. Rated for a maximum of 440 V AC, the 5TT5830-8 handles incandescent lamp loads up to 2 000 W, which is the key rating for lighting circuit applications. The per-pole power loss is 2.2 W at rated current in hot operating state, a figure to factor into enclosure thermal calculations when grouping multiple contactors. The IP20 protection class means the contactor is intended for installation inside a panel or enclosure — not exposed to washdown or outdoor conditions. Supplementary devices can be installed on the contactor, and the manufacturer notes that spacers must be provided between units to ensure adequate heat dissipation, a critical detail for panel builders stacking multiple contactors on a DIN rail.