Siemens 3RT1024-1BB44-3MA0 Power Contactor

Siemens 3RT1024-1BB44-3MA0 is a three-pole Sirius power contactor designed for AC-3 motor starting and control, rated for 12 A and delivering 5.5 kW at 400 V with three normally open main contacts. It features a captive 24 V DC coil and ships with an auxiliary contact block of 2 normally open and 2 normally closed contacts, in a Size S0 with screw-terminal connections suitable for SUVA applications. Built for industrial environments, the unit supports ambient temperatures from -25 to +60 C and operation up to 2,000 m above sea level, with front IP20 protection; its mechanical life is specified around 10 million operating cycles for the main contacts (and varies with auxiliary assemblies), making it appropriate for motor-control panels and starter circuits where a compact 3-pole contactor with auxiliary contacts is required.