3RT2025-1DB40

Description

Overview

The Siemens 3RT2025-1DB40 is a high-performance SIRIUS power contactor designed for reliable switching and control of electric motors and other loads. This 3-pole contactor is rated for AC-3e/AC-3 operation up to 17 A and 7.5 kW at 400 V. It features a 24 V DC control voltage with a plugged-in varistor for surge protection, ensuring enhanced durability and operational stability. The compact Size S0 design makes it ideal for space-saving installations in industrial control panels and machinery.

Key Features & Benefit

• High Performance: Rated for 17 A and 7.5 kW (at 400 V), suitable for a wide range of motor control applications.
• DC Control Voltage: Operates on 24 V DC, offering flexibility and compatibility with modern control systems.
• Integrated Surge Protection: Includes a plugged-in varistor to protect against voltage spikes, extending the lifespan of the contactor and connected equipment.
• Versatile Auxiliary Contacts: Equipped with 1 normally open (NO) and 1 normally closed (NC) auxiliary contact for feedback and interlocking circuits.
• Easy Installation: Features screw terminals for secure and straightforward wiring.
• Compact Design: The Size S0 form factor allows for efficient use of panel space.
• Reliable Brand: Part of the trusted Siemens SIRIUS family, known for quality, safety, and long-term reliability in industrial automation.

Function

The Siemens 3RT2025-1DB40 functions as an electromagnetic switch. When the 24 V DC coil is energized, it closes the main power contacts, allowing current to flow to the connected load. When the coil is de-energized, the contacts open, interrupting the power. The auxiliary contacts change state in unison with the main contacts, providing signals for control logic, status indication, and safety circuits. The integrated varistor effectively suppresses overvoltage peaks that can occur during coil de-energization, protecting sensitive electronics in the control circuit.

Application

• Motor control for pumps, fans, compressors, and conveyors
• Heating, ventilation, and air conditioning (HVAC) systems
• Industrial machinery and automation systems
• Control of lighting, heating, and other resistive loads
• Switching of power supplies and transformers

Technical Specification

• Product Type: Power Contactor
• Product Number: 3RT2025-1DB40
• Series: SIRIUS 3RT2
• Rated Operational Current (AC-3e/AC-3): 17 A (at 400 V)
• Rated Power (AC-3e/AC-3): 7.5 kW (at 400 V)
• Number of Poles: 3
• Control Voltage: 24 V DC
• Surge Protection: Plugged-in varistor
• Auxiliary Contacts: 1 NO + 1 NC
• Connection Type: Screw Terminal
• Size: S0

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