Siemens Power contactor, screw, size S3, 4-pole, 2NO+2NC, 110V/ 37kW Part number 3RT2545-1AK60

Product Overview

The Siemens 3RT2545-1AK60 is a SIRIUS 3RT2 series 4-pole power contactor designed for reliable switching of motors and industrial loads in AC-3 applications. With a high operational current rating and a coil voltage of 110/120 V AC, this contactor provides robust performance in demanding environments. It features a compact S3 frame size and is engineered for long mechanical and electrical service life.

Key Features

• 4-pole industrial power contactor
• Main contact configuration: 2 NO + 2 NC
• Rated for AC-3 switching applications
• High switching capacity for heavy-duty motor control
• Coil voltage: 110 V AC (50 Hz) / 120 V AC (60 Hz)
• Compact S3 size for efficient panel integration
• Durable screw-type terminals for secure wiring

Technical Specifications

• Product Series: SIRIUS 3RT2
• Article Number: 3RT2545-1AK60
• Pole Configuration: 4-pole
• Main Contacts: 2 NO + 2 NC
• Rated Operational Current (AC-3): 80 A (at 400 V)
• Rated Power (AC-3): 37 kW (at 400 V)
• Control Supply Voltage: 110/120 V AC
• Insulation Voltage: 1000 V
• Terminal Type: Screw terminals
• Frame Size: S3
• Operating Temperature: –25 °C to +60 °C

Compliance & Certifications

• Designed according to IEC standards for industrial switching devices
• Meets Siemens SIRIUS requirements for performance and durability
• Suitable for global industrial applications

Applications

Ideal for switching three-phase motors, pumps, compressors, fans, conveyors and other industrial loads. Commonly used in motor starters, control panels, automation systems and power-distribution assemblies where reliable AC-3 motor switching is essential.