Siemens 3RT2545-1AK60 Power Contactor AC-3, 80A, 37kW, 4-Pole, 110/120V Coil, S3 Size Original Brand New

Overview

The Siemens 3RT2545-1AK60 power contactor is an advanced, high-performance switching device designed for reliable motor control applications. Built with Siemens’ internationally recognized engineering quality, this 4-pole contactor supports AC-3 operations up to 80 A and motor outputs up to 37 kW at 400 V, making it ideal for demanding industrial environments.

Its 110 V AC / 50 Hz and 120 V AC / 60 Hz coil compatibility ensures consistent performance across different global systems, while its S3 size design provides an optimal balance of power and compactness.

Benefit

• High switching reliability for AC-3 motor starting applications

• Durable 2 NO + 2 NC main contacts ensuring secure operation

• Auxiliary contacts (1 NO + 1 NC) for additional signaling and control flexibility

• Efficient motor control up to 37 kW / 400 V

• Robust screw terminal design for stable and secure wiring

• Wide coil voltage range suitable for various industrial standards

• Compact S3 frame saving space in control panels

Features

• Current Rating: 80 A (AC-3)

• Power Rating: 37 kW at 400 V

• Poles: 4-pole configuration

• Coil Voltage: 110 V AC (50 Hz) / 120 V AC (60 Hz)

• Main Contacts: 2 Normally Open (NO) + 2 Normally Closed (NC)

• Auxiliary Contacts: 1 NO + 1 NC

• Mounting: Screw terminal connection

• Size Category: S3

Function & Application

The 3RT2545-1AK60 is primarily used for:

1. Motor Switching: Direct switching of three-phase squirrel-cage motors (AC-3 operational category).

2. Resistive Load Switching: Suitable for controlling non-inductive or slightly inductive loads.

3. Circuit Isolation: Providing a reliable point of electrical isolation within a control panel.

4. Reversing Contactors: Can be used in conjunction with a second contactor for basic motor reversing applications.

5. Four-Wire Systems: Ideal for systems where a neutral or fourth line needs to be switched simultaneously with the three phases.

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