Product Description

Siemens SIRIUS Power Contactor 12A, 5.5kW, 400V, 3-Pole, 24V DC, Size S0 – 3RT2024-1BB408K

Product Description

The Siemens 3RT2024-1BB408K is a SIRIUS 3RT2 power contactor designed for reliable switching and control of three-phase motors and industrial electrical loads. It is rated 12A in AC-3e/AC-3 applications and is suitable for motors up to 5.5 kW at 400V. The contactor features a 24V DC control voltage, 3 main poles, 1 NO + 1 NC auxiliary contacts, screw terminal connections, and a compact S0 size. Siemens confirms the corresponding 3RT2024-1BB40 configuration with these specifications and lists it as an active product.

The 3RT2024-1BB408K is suitable for DOL motor starters, MCC panels, pump systems, compressors, conveyors, HVAC equipment, industrial machinery, OEM control panels, and factory automation applications requiring a 24V DC control supply.

Key Features

• Brand: Siemens

• Product family: SIRIUS 3RT

• Model: 3RT2024-1BB408K

• Utilization category: AC-3e/AC-3

• Rated operational current: 12A

• Motor rating: 5.5 kW at 400V

• Main circuit: 3-pole

• Control voltage: 24V DC

• Auxiliary contacts: 1 NO + 1 NC

• Terminal type: Screw terminal

• Contactor size: S0

• Suitable for three-phase motor switching

• Siemens product family: SIRIUS 3RT contactors

Applications

• Three-phase motor control

• DOL motor starters

• Motor Control Centers (MCC)

• Industrial automation panels

• Pump control systems

• Compressor systems

• Conveyor systems

• HVAC equipment

• Manufacturing machinery

• OEM electrical panels

• Machine automation

• Factory electrical systems

Benefits

• Reliable 12A AC-3e/AC-3 motor switching

• Suitable for motors up to 5.5 kW at 400V

• 24V DC control supply for industrial control circuits

• 1 NO + 1 NC auxiliary contacts for control and signaling

• Secure screw-terminal connections

• Compact S0 construction

• Suitable for DOL motor starter assemblies

• Easy integration into industrial control panels

• Reliable Siemens SIRIUS technology

• Suitable for industrial motor-control applications

Frequently Asked Questions

Q1. What is Siemens 3RT2024-1BB408K used for?

The 3RT2024-1BB408K is a Siemens SIRIUS power contactor used for switching and controlling three-phase motors and industrial electrical loads.

Q2. What is the rated current?

The contactor has an AC-3e/AC-3 rated current of 12A.

Q3. What motor power can it handle?

It is suitable for motors up to 5.5 kW at 400V.

Q4. What is the control voltage?

The contactor operates with a 24V DC control voltage.

Q5. How many auxiliary contacts are provided?

It provides 1 NO + 1 NC auxiliary contacts for control, feedback, signaling, and electrical interlocking.

Q6. What type of terminals does it use?

The contactor uses screw terminal connections.

Q7. What is the contactor size?

The 3RT2024-1BB408K is a Size S0 contactor.

Q8. Is it suitable for DOL starters?

Yes. It can be used as the contactor in a DOL motor starter when paired with an appropriately rated motor-protection device.

Q9. Is the Siemens 3RT2024-1BB40 an active product?

Yes. Siemens Industry Mall identifies the corresponding 3RT2024-1BB40 configuration as PM300: Active Product.

Q10. What are the main specifications of 3RT2024-1BB408K?

The main specifications are 12A AC-3e/AC-3, 5.5 kW at 400V, 3-pole, 24V DC control, 1 NO + 1 NC auxiliary contacts, screw terminals, and S0 size.