Siemens Power contactor, 3-pole, 2NO + 2NC, 400V, 7.5kW, 17A Part number 3RT2025-1AP04

Product Overview

The Siemens 3RT2025-1AP04 is a SIRIUS 3RT20 series 3-pole power contactor (size S0) designed for switching three-phase motors and power circuits in industrial automation systems. It features a 230 V AC control coil and is suitable for controlling motors up to 7.5 kW at 400 V AC under AC-3 duty. Its compact construction and screw-terminal connections make it ideal for control panels and motor starter assemblies.

Key Features

• 3-pole power contactor, size S0
• Rated operational current: 17 A (AC-3)
• Motor switching capacity: up to 7.5 kW at 400 V AC
• Control coil voltage: 230 V AC, 50/60 Hz
• Main contacts: 3 × Normally Open (NO)
• Integrated auxiliary contacts: 1 NO + 1 NC
• Screw terminals for main and control circuits
• Compact design for space-saving installations
• Designed for frequent switching in industrial environments

Technical Specifications

• Article Number: 3RT2025-1AP04
• Product Family: SIRIUS 3RT20 power contactors
• Contactor Size: S0
• Number of Poles: 3
• Main Contact Configuration: 3 × NO
• Auxiliary Contacts: 1 × NO + 1 × NC
• Rated Operational Current (AC-3 / 400 V): 17 A
• Rated Motor Power (AC-3 / 400 V): 7.5 kW
• Control Voltage: 230 V AC, 50/60 Hz
• Rated Insulation Voltage (Ui): 690 V
• Impulse Withstand Voltage (Uimp): 6 kV
• Terminal Type: Screw terminals
• Mounting: DIN-rail or panel mounting
• Degree of Protection: IP20 (when mounted in control cabinet)
• Operating Temperature Range: −25 °C … +60 °C

Compliance & Certifications

• Designed according to IEC / EN 60947-4-1 standards for low-voltage contactors
• Part of the modular Siemens SIRIUS system for motor control applications
• Suitable for industrial control panel and automation environments

Applications

The Siemens 3RT2025-1AP04 is used for switching and controlling three-phase motors and loads in industrial automation, building services, and machinery. Typical applications include motor starters, conveyor systems, pumps, compressors, HVAC units, and general automation panels where 230 V AC control voltage is required. Its compact size and in