Siemens SIRIUS Power Contactor 9A, 4kW, 400V, 3-Pole, 110V DC, Size S0 – 3RT2023-1BF40

Product Description

The Siemens 3RT2023-1BF40 is a SIRIUS 3RT2 power contactor designed for reliable switching and control of three-phase motors and industrial electrical loads. It has an AC-3e/AC-3 rated current of 9A and is suitable for motors up to 4kW at 400V. The contactor features a 110V DC control voltage, 3 main poles, 1 NO + 1 NC auxiliary contacts, screw terminal connections, and a compact S0 size. Siemens lists this model as an active product.

The 3RT2023-1BF40 is suitable for DOL motor starters, pump systems, compressors, conveyors, HVAC equipment, industrial machinery, OEM control panels, and factory automation applications requiring a 110V DC control supply.

Key Features

• Brand: Siemens

• Product family: SIRIUS 3RT

• Model: 3RT2023-1BF40

• Utilization category: AC-3e/AC-3

• Rated operational current: 9A

• Motor rating: 4kW at 400V

• Main contacts: 3-pole

• Control voltage: 110V DC

• Auxiliary contacts: 1 NO + 1 NC

• Terminal type: Screw terminal

• Contactor size: S0

• Rated insulation voltage: 690V

• Surge withstand voltage: 6kV

• Mechanical service life: typically 10 million operating cycles

• Operating temperature: -25°C to +60°C

Applications

• Three-phase motor control

• DOL motor starters

• Pump control systems

• Compressor systems

• Conveyor systems

• HVAC equipment

• Industrial automation panels

• Manufacturing machinery

• OEM control panels

• Factory automation

Benefits

• Reliable 9A AC-3e/AC-3 motor switching

• Suitable for motors up to 4kW at 400V

• 110V DC control supply

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

• Secure screw-terminal connections

• Compact S0 construction

• 690V insulation voltage

• 6kV surge withstand capability

• Long mechanical service life

• Suitable for DOL starter applications

• Reliable Siemens SIRIUS technology

Frequently Asked Questions

Q1. What is Siemens 3RT2023-1BF40 used for?

The 3RT2023-1BF40 is 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 9A at 400V.

Q3. What motor power can it handle?

It is suitable for motors up to 4kW at 400V in AC-3/AC-3e applications.

Q4. What is the control voltage?

The contactor operates with a 110V 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 3RT2023-1BF40 is a Size S0 contactor.

Q8. What is the rated insulation voltage?

The rated insulation voltage is 690V, with a 6kV surge withstand voltage.

Q9. Can it be used in a DOL starter?

Yes. It can be used as the main contactor in a DOL motor starter when paired with a suitably selected motor-protection device.

Q10. Is the 3RT2023-1BF40 an active product?

Yes. Siemens Industry Mall lists 3RT2023-1BF40 as PM300 – Product available for sale.