Siemens 3RT2018-1BB42 SIRIUS Power Contactor 3P 16A 7.5kW 24VDC 1NC

The Siemens 3RT2018-1BB42 is a SIRIUS 3RT2 series power contactor rated at 16 A / 7.5 kW at 400 V AC-3e/AC-3, designed for switching three-phase motors and loads. It features a 24 V DC control coil, three main poles, and one instantaneous NC auxiliary contact, housed in size S00 with screw terminals.

Technical specifications:

• MLFB: 3RT2018-1BB42
• Manufacturer: Siemens
• Product line: SIRIUS
• Product type: Power contactor, type designation 3RT2
• Size: S00
• Main poles: 3
• Rated current (AC-3/AC-3e at 400 V): 16 A
• Rated current (AC-1 at 400 V, 40°C): 22 A
• Rated power (AC-3 at 400 V): 7.5 kW
• Rated power (AC-3 at 230 V): 4 kW
• Operating voltage (main circuit): up to 690 V AC
• Control supply voltage: 24 V DC
• Operating range (coil): 0.8 - 1.1 x rated voltage
• Closing power (coil): 4 W
• Holding power (coil): 4 W
• Auxiliary contacts: 1 NC instantaneous
• Terminal type: Screw terminal
• Insulation voltage (main and auxiliary circuit): 690 V
• Surge voltage resistance: 6 kV
• Mechanical service life: 30,000,000 operating cycles
• Closing delay (DC): 30 - 100 ms
• Opening delay (DC): 7 - 13 ms
• Ambient operating temperature: -25 to +60°C
• Installation altitude: up to 2,000 m
• Weight: 290 g

Features and benefits:

• Compact S00 size enables space-saving installation in control panels
• 30 million cycle mechanical service life reduces maintenance intervals
• Wide operating temperature range (-25 to +60°C) suits demanding environments
• 24 V DC coil draws only 4 W holding power, minimising energy consumption
• Compatible with add-on auxiliary switch blocks and electronically optimised modules
• 6 kV surge voltage resistance on both main and auxiliary circuits

Applications:

• Direct-on-line starting of three-phase motors up to 7.5 kW
• Switching of resistive and inductive AC loads in industrial control panels
• Motor control centres and machine automation with 24 V DC PLC outputs
• Reversing and star-delta starter assemblies using size S00 contactors

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

Also known as: Siemens 3RT2018-1BB42, SIRIUS 3RT2 contactor 16A 24VDC.