Siemens 3RT1045-1AP00 Power Contactor for 37kW Motors

Product Description

Product Overview

The Siemens 3RT1045-1AP00 is a three-pole SIRIUS power contactor designed for demanding motor switching applications.
It supports AC-3 motor loads up to 80 A and 37 kW at 400 V, therefore suiting medium-power industrial drives.
Moreover, the contactor belongs to the proven SIRIUS modular system, enabling standardized panel design and expansion.
Although the product is phased out, it remains widely installed across existing motor control installations worldwide.

Technical Specifications

• Manufacturer: Siemens AG

• Product Series: SIRIUS 3RT10

• Model: 3RT1045-1AP00

• Product Type: Power contactor

• Number of Poles: 3-pole

• Rated Operational Current: 80 A (AC-3)

• Motor Power Rating: 37 kW at 400 V AC

• Rated Operational Voltage: Up to 690 V AC

• Control Supply Voltage: 230 V AC, 50 Hz

• Utilization Category: AC-3

• Mounting Method: Screw mounting

• Terminal Type: Screw terminals

• Frame Size: S3

• Degree of Protection: IP20

• Operating Temperature: –25 °C to +60 °C

• Dimensions (L × W × H): 161 × 79.5 × 167 mm

• Net Weight: 1.84 kg

• Country of Origin: Germany

• Compliance: RoHS compliant, WEEE applicable

FAQ

Q1: Is the Siemens 3RT1045-1AP00 still manufactured?
No, this model is phased out and no longer produced by Siemens.

Q2: What is the recommended replacement for this contactor?
The preferred successor is the Siemens SIRIUS 3RT2038-1AP00.

Q3: Can this contactor still be used in existing systems?
Yes, it remains fully functional and suitable for maintenance or spare part replacement.

Q4: What motor size can this contactor control?
It supports motors up to 37 kW at 400 V under AC-3 duty.

Q5: Does it support auxiliary contacts and overload relays?
Yes, it integrates with standard SIRIUS auxiliary and protection accessories.