Siemens 3RT2018-1BB41 Power Contactor 3P 16A 7.5kW 24V DC 1NO S00

The Siemens 3RT2018-1BB41 is a 3-pole SIRIUS power contactor rated at 16 A / 7.5 kW at 400 V (AC-3/AC-3e), controlled by a 24 V DC coil with one built-in instantaneous NO auxiliary contact. This size S00 device supports screw terminal connections and is suitable for main circuit voltages up to 690 V, making it a versatile choice for motor switching applications in industrial control panels.

Technical specifications:

• MLFB: 3RT2018-1BB41
• Manufacturer: Siemens
• Product line: SIRIUS
• Product type: Power contactor (3RT2)
• Size: S00
• Number of poles (main circuit): 3
• Rated current AC-3 at 400 V: 16 A
• Rated current AC-1 at 400 V (40 °C): 22 A
• Operating power AC-3 at 400 V: 7.5 kW
• Maximum operating voltage: 690 V
• Insulation voltage (main and auxiliary circuit): 690 V
• Surge voltage resistance: 6 kV
• Auxiliary contacts: 1 NO instantaneous
• Control supply voltage: 24 V DC
• Closing power / holding power: 4 W / 4 W
• Closing delay (DC): 30 - 100 ms
• Opening delay (DC): 7 - 13 ms
• Terminal type: Screw terminal
• Ambient temperature (operation): -25 ... +60 °C
• Ambient temperature (storage): -55 ... +80 °C
• Maximum installation altitude: 2,000 m
• Net weight: 291 g

Features and benefits:

• Mechanical service life of 30,000,000 operating cycles supports high-frequency switching applications
• Maximum operating frequency of 750 switching operations per hour at AC-3
• Low holding power of 4 W at DC coil reduces panel energy consumption
• Supports DC load switching across multiple series current-path configurations
• Wide operating temperature range from -25 °C to +60 °C for demanding environments
• Compact size S00 format with screw terminals simplifies installation in standard control enclosures

Applications:

• Switching three-phase motors up to 7.5 kW in industrial machinery and conveyor systems
• Motor control centers and starter assemblies driven by 24 V DC PLC outputs
• Pump and fan control in building services and HVAC installations
• Resistive and inductive load switching in manufacturing and process automation equipment

Compliant with EN 60947-1 and EN/IEC 60947-4-1 for electromechanical contactors. Part of the Siemens SIRIUS 3RT2 range.

Also known as: Siemens 3RT2018-1BB41, SIRIUS 3RT2 contactor 16A 24VDC, Siemens S00 power contactor.