3RT1045-1AP04

Overview: Siemens 3RT1045-1AP04 Power Contactor

The Siemens 3RT1045-1AP04 is a 3-pole power contactor from the SIRIUS series, designed for heavy-duty industrial motor control and power switching. It supports a rated current of 80 A at 400 V AC and motor power capacity up to 37 kW. The contactor operates with a 230 V AC coil at 50 Hz and features 2 normally open (NO) and 2 normally closed (NC) auxiliary contacts. The device has screw terminal connections and is built with frame size S3, suitable for large motor starters requiring reliable and durable operation.

Key Features

• Rated Current: 80 A at 400 V AC for high power motor switching.
• Motor Power: Supports motors up to 37 kW at 400 V AC.
• Poles: 3-pole configuration providing robust three-phase switching.
• Auxiliary Contacts: 2 NO + 2 NC for versatile control and signaling options.
• Coil Voltage: 230 V AC, 50 Hz coil for standard industrial control.
• Connection Type: Screw terminals ensuring secure wiring connections.
• Frame Size: S3, ideal for large motor control panels.
• Mechanical Life: Rated for 10 million mechanical switching cycles.
• Operating Temperature Range: -25 to +60 °C to cope with industrial environments.
• Status: Product is phased out, replaced by newer models like Siemens 3RT2038-1AP04.

Technical Specs

Applications / Use Case

The Siemens 3RT1045-1AP04 is used in high power industrial motor control and power distribution systems, offering reliable switching and auxiliary control for central automation panels and heavy machinery.