Siemens 3RT2024-1BB40 Power Contactor 12A 5.5kW 3P 24V DC

The Siemens 3RT2024-1BB40 is a SIRIUS 3RT2 three-pole power contactor rated at 12 A (AC-3) and 5.5 kW at 400 V. It operates from a 24 V DC control coil, includes integrated 1 NO + 1 NC auxiliary contacts, and is built in a compact S0 frame with screw terminals for AC-3e/AC-3 motor switching duty.

Technical specifications:

• MLFB: 3RT2024-1BB40
• Manufacturer: Siemens
• Product line: SIRIUS
• Product type: Power contactor (3RT2), size S0
• Poles: 3
• Rated current AC-3: 12 A at 400 V / 12 A at 500 V / 9 A at 690 V
• Rated operating power AC-3: 5.5 kW at 400 V, 5.5 kW at 500 V, 7.5 kW at 690 V
• Control supply voltage: 24 V DC
• Coil closing and holding power: 5.9 W
• Auxiliary contacts: 1 NO + 1 NC
• Terminal type: Screw terminal
• Insulation voltage (main and auxiliary circuit): 690 V, degree of pollution 3
• Surge voltage resistance: 6 kV
• Mechanical service life: 10,000,000 operating cycles
• Closing delay DC: 50 to 170 ms
• Opening delay DC: 15 to 18 ms
• Ambient operating temperature: -25 to +60°C
• Storage temperature: -55 to +80°C
• Maximum installation altitude: 2,000 m
• Net weight: 600 g

Features and benefits:

• Mechanical service life of 10,000,000 operating cycles supports high-cycle industrial duty
• Integrated 1 NO + 1 NC auxiliary contacts reduce the need for separate add-on blocks
• DC coil closing and holding power of only 5.9 W minimises heat generation in control circuits
• Wide operating temperature range (-25 to +60°C) supports installation in demanding environments
• Compatible with electronically optimized auxiliary switch blocks for 5,000,000-cycle operation

Applications:

• Direct-on-line starting and switching of three-phase motors up to 5.5 kW at 400 V (AC-3)
• Motor control centers and industrial control panels driven by 24 V DC PLC outputs
• Reversing starters and star-delta starters in AC-3/AC-3e applications
• Pump and fan motor control in building services and factory automation

Compliant with EN 60947-1. Part of the Siemens SIRIUS 3RT2 range.

Also known as: Siemens 3RT2024-1BB40, SIRIUS 3RT2 power contactor 24V DC, Siemens S0 contactor 12A.