Siemens 3RT2023-1BB44 SIRIUS Power Contactor 3P 9A 4kW 24V DC

The Siemens 3RT2023-1BB44 is a 3-pole SIRIUS power contactor rated 9 A (AC-3) and 4 kW at 400 V, controlled by a 24 V DC coil. It includes a removable 2 NO + 2 NC auxiliary switch block and screw terminals for direct panel wiring. Size S0 construction makes it suitable for motor switching in industrial control systems operating up to 690 V.

Technical specifications:

• MLFB: 3RT2023-1BB44
• Manufacturer: Siemens
• Product line: SIRIUS
• Product type: Power contactor (3RT2), size S0
• Main poles: 3 (3 NO, 0 NC)
• Auxiliary contacts: 2 NO + 2 NC, removable auxiliary switch
• Rated current AC-3: 9 A at 400-690 V
• Rated current AC-1 (400 V, 40°C): 40 A
• Operating power AC-3: 4 kW at 400 V, 7.5 kW at 690 V
• Control supply voltage: 24 V DC
• Coil operating range: 0.8 to 1.1 x rated voltage
• Closing power / holding power: 5.9 W
• Closing delay (DC): 50-170 ms; opening delay: 15-18 ms
• Maximum operating voltage: 690 V (AC-3/AC-3e)
• Insulation voltage (pollution degree 3): 690 V
• Surge voltage resistance: 6 kV
• Terminal type: Screw
• Mechanical service life: 10,000,000 operating cycles
• Maximum operating frequency (AC-3): 1,000 operations/h
• Ambient temperature (operation): -25 to +60°C
• Storage temperature: -55 to +80°C
• Installation altitude: max 2,000 m

Features and benefits:

• Removable 2 NO + 2 NC auxiliary switch block provides signalling and interlocking flexibility without a separate accessory
• 24 V DC coil with 5.9 W holding power is directly compatible with standard PLC output modules
• 10,000,000 mechanical operating cycles supports long service life in high-frequency switching duty
• Coil operating range of 0.8 to 1.1 x rated voltage tolerates supply voltage fluctuations without nuisance drop-out
• 6 kV surge voltage resistance on both main and auxiliary circuits meets industrial network requirements

Applications:

• Switching three-phase AC motors up to 4 kW at 400 V in AC-3 duty cycles
• Motor control centers and machine panels driven by 24 V DC PLC or relay control systems
• Star-delta and reversing starter circuits using the integrated 2 NO + 2 NC auxiliary contacts
• General load switching in industrial enclosures at voltages up to 690 V

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

Also known as: Siemens 3RT2023-1BB44, SIRIUS 3RT2 power contactor 9A 24V DC, Siemens S0 contactor 24V DC coil.