The Siemens 5TT5852-2 is a SENTRON Insta contactor rated for 63 A at 440 V AC, with a 24 V AC coil and a contact configuration of 2 normally-open and 2 normally-closed poles. The 63 A rating at 440 V AC means this contactor handles motor loads, resistive heating banks, and lighting circuits up to that current in an AC distribution panel. The 24 V AC coil keeps control voltage low-voltage for safety, common in building automation and industrial control cabinets where a separate 24 V AC control transformer feeds the coil bus. For incandescent lamp loads, the switching capacity is rated at 5 000 W — useful for large lighting contactor panels in commercial or industrial lighting zones where tungsten inrush is a factor.
Mounting and thermal management
The installation note explicitly requires spacers between units to ensure heat dissipation — this is not optional. With 8 W power loss per pole in hot operating state at rated AC current, stacking contactors without the specified air gap will derate the assembly or cause nuisance tripping of upstream protection. Dimensions: 71 mm depth, 54 mm width (3 MW), 90 mm height.