Capacity Power Contactor for Reliable Motor Switching
Overview
The Siemens 3RT1044-1A is a robust 3-pole power contactor from the SIRIUS 3RT1 series, designed for switching motors and heavy industrial loads. With a 230V AC coil and 85A operational current (AC-3), this contactor ensures dependable performance in motor control centers and automation systems requiring reliable, long-lasting components.

Key Features
Product Line: SIRIUS 3RT1

Number of Poles: 3

Rated Current: 85A (AC-3, 400V)

Coil Voltage: 230V AC, 50/60 Hz

Utilization Category: AC-3 for motor loads, AC-1 for resistive loads

Auxiliary Contacts: 1 NO + 1 NC built-in

Durability: Over 10 million mechanical operations

Mounting Type: Screw or rail mounting for flexibility

Technical Specifications
Catalog Number: 3RT1044-1A

Rated Operational Voltage: Up to 690V AC

Motor Power Rating: Up to 45 kW (at 400V)

Operating Frequency: 50/60 Hz

Mechanical Life: 10 million operations

Ambient Temperature: -25°C to +60°C (-13°F to +140°F)

Protection Class: IP20

Certifications: CE, UL, CSA

Applications
Motor starters for industrial machinery

Conveyor and material handling systems

HVAC units and compressors

Pumps and fans

General-purpose switching in control panels

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