3RT5045-1AL20

Product Description

Home / Low Voltage / Contactors / Siemens SIRIUS 3RT5 Need Siemens 3RT5045-1AL20? Power contactor for Three-phase motor control. Supplied with full traceability and documentation. Request a quote and current... Price & Availability Classified as a power contactor, it is positioned as a direct replacement and service part for existing installations. It is intended for use within Three-phase motor control, where dependable operation and a precise fit are essential to keeping the plant running. Listed as Active, it is offered as a maintained and verified spare that supports the continued operation of the installed base. Key technical specifications include: The Poles is 3 (main, NO). Its Rated power AC-3 is rated at 37 kW (at 400 V). For reference, the Control coil voltage is 230 V AC, 50/60 Hz. The Rated insulation voltage Ui is 1000 V. Its Rated impulse voltage Uimp is rated at 6 kV. For reference, the Size is S3. The Mechanical life is 10,000,000 switching cycles. Notable features of this unit: 3-pole main contacts, 80 A AC-3. AC coil 230 V 50/60 Hz. High mechanical durability (10 million cycles). Typical applications include Three-phase motor starting and control, Pumps, compressors and conveyors, Industrial automation panels. It is compatible with or cross-references Siemens SIRIUS overload relays and accessories, SIRIUS front/side auxiliary contacts. Equivalent / cross-reference designation: IEC 60947-1 / 60947-4-1 / 60947-5-1. Within industrial automation and process-control environments, components of this type are relied upon to keep critical equipment operating safely and efficiently. They are typically specified where uptime, repeatability and a predictable maintenance cycle matter more than upfront cost. A power contactor such as this one forms part of a larger machine or system, so correct identification and fitment directly affect the performance and safety of the whole installation. Siemens parts are widely used across power generation, manufacturing, oil and gas, water and process industries, where engineering teams standardise on proven series to simplify spares planning. When selecting a replacement, confirm the exact model designation and verify that the mechanical and electrical interface matches the unit currently installed. Cross-checking the order code, mounting style and connection type against the existing device helps avoid compatibility issues and unplanned downtime during a maintenance window. Where several variants exist, the suffix often defines voltage, range or firmware, so it should be matched precisely rather than approximated. This item is offered from our active stock of current and discontinued industrial parts. Each listing is verified against the manufacturer designation before shipment so you receive the correct part for your application. Availability and lead time vary by item; our team can confirm the fastest option for your required quantity and provide a formal quotation on request. Common questions: Regarding "What current is the 3RT5045-1AL20 rated for": It is rated 80 A at 400 V AC-3, equal to 37 kW motor power at 400 V. Regarding "What coil voltage does it use": The -1AL20 suffix denotes a 230 V AC coil at 50/60 Hz. Please contact us to confirm current pricing, availability and delivery for your required quantity; volume and project pricing are available on request. The Siemens 3RT5045-1AL20 is a power contactor. Basic Product Information AC coil 230 V 50/60 Hz Size S3, screw terminal High mechanical durability (10 million cycles) 3-pole main contacts, 80 A AC-3 Technical Specifications Version & Model Difference ['3RT5045-1AL20 = 230 V AC coil', 'Other coil voltage and auxiliary contact variants available', '3RT5 covers sizes S00 to S3'] Application Scenarios Three-phase motor starting and control Pumps, compressors and conveyors Industrial automation panels What coil voltage does it use? The -1AL20 suffix denotes a 230 V AC coil at 50/60 Hz. What is the rated insulation voltage? Rated insulation voltage Ui is 1000 V with an impulse withstand of 6 kV. What size is the contactor? It is a size S3 contactor with screw terminals. What current is the 3RT5045-1AL20 rated for? It is rated 80 A at 400 V AC-3, equal to 37 kW motor power at 400 V. Siemens 6ES7214-1BH50-0XB0 PLC CPU (Type-1) Siemens 6ES7231-4HF50-0XB0 Analog Input Module Siemens 6ES7231-5PD50-0XB0 Analog RTD Module Siemens 6ES7231-5QF50-0XB0 Analog TC Module (S7-1200) Siemens 6ES7233-4HF50-0XB0 Analog IO Module (SM 1234) Siemens 6ES7216-2BD23-0XB0 PLC CPU (Type-2) Siemens 6ES7223-1BH22-0XA0 PLC IO Module (Type-1) Siemens 6ES7223-5PH50-0XB0 PLC IO Module (Type-2)