Product Description

Siemens SIRIUS Power Contactor 17A, 7.5kW, 400V, 3-Pole, 21–28V AC/DC, Size S0 – 3RT2025-1NB30

Product Description

The Siemens 3RT2025-1NB30 is a reliable Power Contactor from the SIRIUS 3RT2 series, designed for switching and controlling three-phase motors and industrial electrical loads. It features 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 21–28V AC/DC control voltage at 50/60 Hz and includes an integrated varistor for voltage surge suppression. It provides 1 NO + 1 NC auxiliary contacts, 3 main poles, screw terminal connections, and a compact S0 size design.

The Siemens 3RT2025-1NB30 is suitable for three-phase motor control, Motor Control Centers (MCC), DOL starters, pump control systems, compressors, conveyor systems, HVAC equipment, industrial machinery, OEM control panels, and factory automation. Its AC/DC control capability provides flexibility for industrial control circuits requiring a 21–28V supply.

At SB Smart, Faridabad, we supply 100% genuine Siemens SIRIUS contactors, motor protection circuit breakers, overload relays, soft starters, MCCBs, MCBs, and industrial automation products at competitive prices. We provide GST invoices, expert technical support, bulk order assistance, secure packaging, and fast delivery across Faridabad, Delhi NCR, and all major cities in India, making SB Smart a trusted supplier for industries, OEMs, panel builders, and electrical contractors.

Key Features

• Genuine Siemens SIRIUS 3RT2 Power Contactor

• Model: 3RT2025-1NB30

• Utilization Category: AC-3e/AC-3

• Rated Operational Current: 17A at 400V

• Motor Power: 7.5 kW at 400V

• Rated Operating Voltage: 400V

• 3-Pole Configuration

• Control Voltage: 21–28V AC/DC

• Control Frequency: 50/60 Hz

• Integrated Varistor

• Auxiliary Contacts: 1 NO + 1 NC

• Screw Terminal Connections

• Contactor Size: S0

• Rated Insulation Voltage: 690V

• Surge Withstand Voltage: 6 kV

• Mechanical Service Life: Up to 10 million operating cycles

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

Applications

• Motor Control Centers (MCC)

• Industrial Automation Panels

• DOL Motor Starters

• Three-Phase Motor Control

• Pump Control Panels

• Compressors

• Conveyor Systems

• HVAC Systems

• Manufacturing Machinery

• OEM Electrical Panels

• Machine Control Panels

• Factory Automation

Benefits

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

• Suitable for motors up to 7.5 kW at 400V

• Flexible 21–28V AC/DC control operation

• Integrated varistor helps suppress switching voltage peaks

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

• Secure screw-terminal connections

• Compact and durable S0 design

• High 690V insulation voltage

• 6kV surge withstand capability

• Long mechanical service life

• Easy integration into industrial motor-control systems

• Suitable for DOL starter applications

• Reliable Siemens SIRIUS performance

Frequently Asked Questions (FAQs)

Q1. What is Siemens 3RT2025-1NB30 used for?

The Siemens 3RT2025-1NB30 is a SIRIUS power contactor designed 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 3RT2025-1NB30?

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

Q3. What motor power can it handle?

The 3RT2025-1NB30 is suitable for motors up to 7.5 kW at 400V.

Q4. What is the control voltage?

The contactor operates with a 21–28V AC/DC control voltage and supports 50/60 Hz AC operation.

Q5. Does it have an integrated varistor?

Yes. The 3RT2025-1NB30 features an integrated varistor for suppressing voltage peaks during contactor coil switching.

Q6. What auxiliary contacts are provided?

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

Q7. What type of terminals does it use?

The 3RT2025-1NB30 uses screw terminal connections for the main circuit.

Q8. What is the contactor size?

The 3RT2025-1NB30 belongs to Size S0.

Q9. Is it suitable for DOL motor starters?

Yes. The contactor can be used in DOL motor starter assemblies with an appropriately selected motor protection device.

Q10. Why buy Siemens 3RT2025-1NB30 from SB Smart Faridabad?

SB Smart, Faridabad supplies 100% genuine Siemens industrial products with competitive pricing, expert technical support, GST invoices, bulk order assistance, secure packaging, and fast delivery across Faridabad, Delhi NCR, and throughout India.