Siemens 3RT2025-1CK64-3MA0 SIRIUS Power Contactor, 17A (7.5 kW), 3-Pole, 110V AC Coil, Size S0, 2NO + 2NC Aux Contacts Original Brand New

Overview

The Siemens 3RT2025-1CK64-3MA0 is a high-performance, 3-pole SIRIUS power contactor designed for switching motors up to 7.5 kW (400 V), corresponding to a rated operational current of 17 A (AC-3/AC-3e). This specific model, part of the compact SIRIUS 3RT2 series (Size S0), features a universal control coil for 110 V AC (50 Hz) / 120 V AC (60 Hz) and includes a pre-fitted, plugged-in varistor for reliable surge suppression. Its robust design is complemented by 2 NO and 2 NC captive auxiliary contacts and secure screw terminals for all connections.

Benefit

• Space-Saving Design (Size S0): High performance in a compact footprint, optimizing control cabinet space.
• Enhanced Reliability: Includes a plugged-in varistor to protect the coil and control circuit from surge voltage spikes, ensuring a longer service life.
• Versatile Control: Universal coil voltage supports both 110V AC (50Hz) and 120V AC (60Hz) power systems, simplifying stock and global application use.
• Ready-to-Use Functionality: Comes equipped with 2 NO + 2 NC captive auxiliary contacts, offering extensive signaling and control circuit options without the need for external mounting blocks.
• Robust Connection: Secure and widely-used screw terminals provide reliable, high-contact force wiring.
• IE3/IE4 Ready: Optimized for efficient switching of modern, high-efficiency motors.

Function & Application

The Siemens 3RT2025-1CK64-3MA0 power contactor is primarily used in industrial automation and control systems for switching motors.

• Function: It is an electromechanical switch that closes and opens the main power circuit to the motor based on a low-voltage control signal applied to its coil.
• Applications:
  • Direct On-Line (DOL) motor starters.
  • Switching resistive and slightly inductive loads (AC-1).
  • Use in reversing contactor assemblies and Star-Delta (Wye-Delta) starters.
  • Integration into complex control systems for reliable load switching.

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