Siemens 3RT2024-1BB44 Power Contactor 3P 12A 5.5kW 24VDC

The Siemens 3RT2024-1BB44 is a SIRIUS 3RT2 series power contactor rated 12 A / 5.5 kW at 400 V AC-3. The 3-pole size S0 unit operates from a 24 V DC coil and ships with a removable 2 NO + 2 NC auxiliary switch block and screw terminals.

Technical specifications:

• MLFB: 3RT2024-1BB44
• Manufacturer: Siemens
• Product line: SIRIUS
• Size: S0
• Poles: 3
• Rated current (AC-3, 400 V): 12 A
• Rated current (AC-1, 400 V, 40 °C): 40 A
• Operating power (AC-3, 400 V): 5.5 kW
• Operating power (AC-3, 690 V): 7.5 kW
• Operating voltage (main circuit): up to 690 V
• Control supply voltage: 24 V DC
• Coil power (closing and holding): 5.9 W
• Auxiliary contacts: 2 NO + 2 NC, removable
• Terminal type: screw terminal
• Insulation voltage (main and auxiliary circuit): 690 V
• Surge voltage resistance: 6 kV
• Ambient operating temperature: -25 ... +60 °C
• Storage temperature: -55 ... +80 °C
• Installation altitude: max 2000 m
• Mechanical service life: 10,000,000 operating cycles
• Maximum operating frequency (AC-3): 1000/h
• Power loss at rated current (AC, hot state): 0.9 W

Features and benefits:

• Removable auxiliary switch block delivers 2 NO + 2 NC contacts reconfigurable without rewiring
• Low coil power of 5.9 W for both closing and holding minimises control circuit loading
• 10,000,000 mechanical operating cycles supports sustained high-frequency switching duty
• Wide operating temperature range -25 ... +60 °C suits demanding panel environments

Applications:

• Switching three-phase induction motors up to 5.5 kW at 400 V
• Direct-on-line and reversing motor starter assemblies
• Conveyor, pump, and fan motor control in industrial panels
• 24 V DC PLC-controlled automation circuits

Compliant with EN 60947-1 and IEC 60068-2-30. Part of the Siemens SIRIUS 3RT2 range.

Also known as: Siemens 3RT2024-1BB44, 3RT20241BB44, Siemens SIRIUS 3RT2 power contactor S0.