Siemens 3RT2045-1AP00 SIRIUS Power Contactor 3P 80A 37kW 230VAC

The Siemens 3RT2045-1AP00 is a SIRIUS 3RT2 series power contactor rated at 80 A and 37 kW at 400 V under AC-3 duty. This 3-pole, size S3 contactor is controlled by a 230 V AC / 50 Hz coil and includes integrated 1 NO + 1 NC auxiliary contacts. Main circuit operating voltage extends to 1000 V, covering a broad range of industrial motor-switching applications.

Technical specifications:

• MLFB: 3RT2045-1AP00
• Manufacturer: Siemens
• Product line: SIRIUS
• Product type designation: 3RT2
• Size: S3
• Number of main poles: 3
• Rated current AC-3 at 400 V: 80 A
• Rated current AC-1 at 400 V / 40 °C: 125 A
• Rated operating power AC-3 at 400 V: 37 kW
• Maximum operating voltage AC-3/AC-3e: 1000 V
• Control supply voltage: 230 V AC, 50 Hz
• Coil operating range: 0.8 to 1.1 x rated coil voltage (AC, 50 Hz)
• Auxiliary contacts: 1 NO + 1 NC
• Terminal type: screw terminal
• Insulation voltage, main circuit (pollution degree 3): 1000 V
• Insulation voltage, auxiliary circuit (pollution degree 3): 690 V
• Surge voltage resistance, main circuit: 8 kV
• Mechanical service life: 10,000,000 operating cycles
• Operating frequency AC-3: max 1000 1/h
• Ambient operating temperature: -25 to +60 °C
• Installation altitude: max 2000 m above sea level
• Net weight: 1.705 kg

Features and benefits:

• Mechanical service life of 10 million operating cycles reduces downtime and replacement frequency in high-duty installations
• Surge voltage resistance of 8 kV on the main circuit protects against transient overvoltages
• Integrated 1 NO + 1 NC auxiliary contacts support control and feedback wiring without additional switch blocks
• Operating temperature range of -25 to +60 °C allows deployment across demanding ambient conditions
• Apparent pick-up power of 296 VA at 50 Hz enables direct drive from standard control transformers

Applications:

• Starting and switching three-phase motors up to 37 kW at 400 V in industrial machinery
• Motor control centers and switchgear panels requiring high switching-cycle capability
• Pump, fan, and conveyor drive control at up to 1000 switching operations per hour (AC-3)
• Process automation panels operating across extended voltage ranges up to 1000 V

Compliant with EN 60947-1. Part of the Siemens SIRIUS 3RT2 range.

Also known as: Siemens 3RT2045-1AP00, SIRIUS 3RT2 power contactor 80 A 230 V coil.