Product Description
Siemens 3RT5045-1AN20
The Siemens 3RT5045-1AN20 is a robust and reliable SIRIUS power contactor designed for switching motors in demanding industrial environments. Part of the SIRIUS modular system, this size S3 contactor offers high performance and a long mechanical and electrical service life. It is engineered for efficiency, featuring a compact design that saves valuable cabinet space. With a rated operational current of 80 A at AC-3 / 400 V, it is ideal for controlling three-phase motors up to 37 kW. The device is equipped with screw terminals for secure and straightforward wiring and includes integrated auxiliary contacts (1 NO + 1 NC) for control and signaling purposes. Its 220 V AC coil ensures compatibility with common control voltage systems.
Technical Specifications:
- Size of contactor: S3
- Operational current at AC-3 / 400 V: 80 A
- Operating power for 3-phase motors at 400 V: 37 kW
- Control supply voltage: 220 V AC (50/60 Hz)
- Number of poles: 3-pole
- Auxiliary contacts: 1 Normally Open (NO) + 1 Normally Closed (NC)
- Type of electrical connection: Screw terminals

Siemens 3RT5045-1AN20
Buy the Siemens 3RT5045-1AN20 SIRIUS Power Contactor, size S3, 3-pole, 80A, 37kW at 400V. Features a 220V AC coil and screw terminals for reliable motor switching applications.







