Product Description

Siemens SIRIUS Power Contactor 17A, 7.5kW, 400V, 3-Pole, 24V AC, Size S0 – 3RT2025-1AC208K

Product Description

The Siemens 3RT2025-1AC208K 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 rating of 17A and is suitable for motors up to 7.5 kW at 400V. The contactor operates with a 24V AC control voltage at 50/60 Hz and provides 1 NO + 1 NC auxiliary contacts for control, feedback, signaling, and electrical interlocking. It features 3 main poles, screw terminal connections, and a compact S0 size. Siemens confirms these specifications for the 3RT2025-1AC20 variant.

The 3RT2025-1AC208K is suitable for three-phase motor control, DOL starters, MCC panels, pumps, compressors, conveyor systems, HVAC equipment, industrial machinery, OEM control panels, and factory automation applications requiring a 24V AC control supply.

Key Features

• Brand: Siemens

• Product family: SIRIUS 3RT

• Model: 3RT2025-1AC208K

• Utilization category: AC-3e/AC-3

• Rated operational current: 17A at 400V

• Motor rating: 7.5 kW at 400V

• Main contacts: 3-pole

• Control voltage: 24V AC

• Control frequency: 50/60 Hz

• Auxiliary contacts: 1 NO + 1 NC

• Terminal type: Screw terminal

• Contactor size: S0

• Rated insulation voltage: 690V

• Surge withstand voltage: 6 kV

• Front protection: IP20

• Mechanical service life: typically 10 million operating cycles

• Net weight: approximately 407 g

Applications

• Three-phase motor control

• DOL motor starters

• Motor Control Centers (MCC)

• Industrial automation panels

• Pump control panels

• Compressor systems

• Conveyor systems

• HVAC equipment

• Manufacturing machinery

• OEM control panels

• Machine automation

• Factory electrical systems

Benefits

• Reliable 17A AC-3e/AC-3 motor switching

• Suitable for motors up to 7.5 kW at 400V

• 24V AC, 50/60 Hz control supply

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

• Secure screw-terminal connections

• Compact S0 construction for panel installation

• High 690V insulation voltage

• 6kV surge withstand capability

• Long mechanical service life

• Suitable for DOL motor starter assemblies

• Reliable Siemens SIRIUS technology

• Easy integration into industrial motor-control systems

Frequently Asked Questions

Q1. What is Siemens 3RT2025-1AC208K used for?

The 3RT2025-1AC208K is a Siemens SIRIUS power contactor used for switching and controlling three-phase motors and industrial electrical loads. It is rated at 17A AC-3e/AC-3 and supports motors up to 7.5 kW at 400V.

Q2. What is the rated current of 3RT2025-1AC208K?

The contactor has a rated operational current of 17A at 400V for AC-3 and AC-3e applications.

Q3. What motor power can it handle?

It is suitable for motors up to 7.5 kW at 400V in AC-3/AC-3e applications.

Q4. What is the control voltage?

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

Q5. How many auxiliary contacts are provided?

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

Q6. What type of terminals does it use?

The 3RT2025-1AC208K uses screw terminal connections.

Q7. What is the contactor size?

The contactor is Size S0.

Q8. What is the 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 contactor in a DOL motor starter when paired with a suitably rated motor-protection device.

Q10. Is the 3RT2025-1AC20 an active Siemens product?

Yes. Siemens Industry Mall lists 3RT2025-1AC20 as PM300: Active Product.