Siemens SIRIUS Power Contactor 12A, 5.5kW, 400V, 3-Pole, 24V AC, Size S0 – 3RT2024-1AC20

Product Description

The Siemens 3RT2024-1AC20 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 12A and supports motor power up to 5.5kW at 400V. The contactor features a 24V AC control voltage at 50/60Hz, 3 main poles, 1 NO + 1 NC auxiliary contacts, screw terminals, and Size S0 construction. Siemens lists this exact model as an active product.

It is suitable for DOL motor starters, MCC panels, pump and compressor systems, conveyor systems, HVAC equipment, industrial machinery, OEM control panels, and automation applications requiring a 24V AC control circuit.

Key Features

• Brand: Siemens

• Product family: SIRIUS 3RT

• Model: 3RT2024-1AC20

• Utilization category: AC-3e/AC-3

• Rated operational current: 12A at 400V

• Motor rating: 5.5kW at 400V

• Main contacts: 3-pole

• Control voltage: 24V AC

• Control frequency: 50/60Hz

• Auxiliary contacts: 1 NO + 1 NC

• Terminal type: Screw terminal

• Contactor size: S0

• Rated insulation voltage: 690V

• Surge withstand voltage: 6kV

• Typical mechanical service life: 10 million operating cycles

• Net weight: approximately 0.406kg

Applications

• Three-phase motor control

• DOL motor starters

• Motor Control Centers (MCC)

• Pump control panels

• Compressor systems

• Conveyor systems

• HVAC equipment

• Industrial automation panels

• Manufacturing machinery

• OEM control panels

• Machine automation

• Factory electrical systems

Benefits

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

• Suitable for motors up to 5.5kW at 400V

• 24V AC, 50/60Hz 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

• Easy integration into industrial control panels

• Suitable for DOL starter applications

• Reliable Siemens SIRIUS technology

Frequently Asked Questions

Q1. What is Siemens 3RT2024-1AC20 used for?

The 3RT2024-1AC20 is used for switching and controlling three-phase motors and industrial electrical loads in motor-control and automation systems.

Q2. What is the rated current?

The contactor is rated 12A at 400V in AC-3 and AC-3e applications.

Q3. What motor power can it handle?

It is suitable for motors up to 5.5kW at 400V in AC-3/AC-3e applications.

Q4. What is the control voltage?

The contactor operates with a 24V AC control voltage at 50/60Hz.

Q5. How many auxiliary contacts are provided?

It has 1 NO + 1 NC auxiliary contacts, which can be used for control, feedback, signaling, and interlocking.

Q6. What type of terminals does it use?

The contactor uses screw-terminal connections.

Q7. What is the contactor size?

The 3RT2024-1AC20 is a Size S0 contactor.

Q8. What is the rated insulation voltage?

The rated insulation voltage for both the main and auxiliary circuits 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 rated motor-protection device.

Q10. Is 3RT2024-1AC20 an active Siemens product?

Yes. Siemens Industry Mall identifies 3RT2024-1AC20 as PM300: Active Product.