Siemens
Siemens Power 3RT5045-1AL20
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Specifications
| Brand | Siemens |
|---|---|
| Model Number | 3RT5045-1AL20 |
| Official Product Name | SIRIUS 3RT5 Power Contactor, size S3, 3RT5045 |
| Applicable System | Three-phase AC motor control and industrial load switching |
| Product Type | Power / Magnetic Contactor, 3-pole |
| Equivalent Standard | IEC 60947-4-1 (also IEC 60947-1, EN 50274) |
| Product Status | In Stock |
| Rated current AC-3 (400 V) | 80 A |
| Rated current AC-1 (690 V, 40 C) | 120 A |
| Motor rating AC-3 (400 V) | 37 kW |
| Control coil voltage | 230 V AC, 50/60 Hz |
| Rated insulation voltage Ui | 1000 V |
| Rated impulse withstand voltage Uimp | 6 kV |
| Connection | Screw-clamp terminals, size S3 |
| Mounting | DIN rail or surface mounting |
| Degree of protection | IP20 (finger-safe) |
| Mechanical life | 10,000,000 operating cycles |
| Number of poles | 3P (3 normally-open main contacts) |
Product Description
It is rated 80 A in AC-3 duty and controls motors up to 37 kW at 400 V AC, with an AC-1 rating of 120 A at 690 V. The coil is a 230 V AC 50/60 Hz type, and the device uses screw-clamp terminals. It carries a rated insulation voltage of 1000 V and withstands 6 kV impulse, with a mechanical life of up to 10 million operations. The Siemens 3RT5045-1AL20 is a three-pole SIRIUS 3RT5 power contactor in size S3, used for direct-on-line switching of three-phase motors and other industrial loads.
Basic Product Information
- AC-3 rated current 80 A, switching motors up to 37 kW at 400 V AC
- AC-1 rated current 120 A at 690 V (40 C ambient)
- Control coil 230 V AC, 50/60 Hz
- Screw-clamp main terminals with finger-safe (IP20) design
- Mechanical service life up to 10 million operating cycles
- Three-pole (3P) SIRIUS 3RT5 power contactor in size S3
Technical Specifications
Version & Model Difference
The 3RT5045 contactor is supplied with different coil voltages and with or without integrated auxiliary contacts; the -1AL20 suffix specifies a 230 V AC 50/60 Hz coil. Where extra contacts are needed, auxiliary switch blocks can be added to the S3 body. Confirm the coil voltage and auxiliary contact configuration when ordering.
Application Scenarios
- Direct-on-line starting of three-phase motors up to 37 kW
- Switching of resistive and inductive loads in machine control panels
- Motor starter and contactor combinations in industrial control gear
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Frequently Asked Questions
What is the coil voltage of the 3RT5045-1AL20?
It has a 230 V AC 50/60 Hz control coil.
Can this contactor start a 37 kW motor?
Yes, its AC-3 rating at 400 V AC is 80 A, corresponding to 37 kW.
How many main contacts does it have?
It is a three-pole device with three normally-open (3 NO) main contacts.
What terminals does it use?
It uses screw-clamp terminals and is a size S3 contactor.
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