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Specification & Description
| Specification | Description |
|---|---|
| Part Number | 3RT1025-1AL20 |
| Alternative Part Number | 3RT10251AL20 |
| Manufacturer | Siemens |
| Product Type | Power Contactor |
| Poles | 3 Poles |
| Contact Configuration | 3NO (3 Normally Open) |
| Rated Operational Current | AC-3 17 A |
| Power Rating at 400 V | 7.5 kW |
| Control Voltage | 230 V AC |
| Frequency | 50/60 Hz |
| Size | S0 |
| Connection Type | Screw Connection |
| Protection Class | IP20 |
| Degree of Pollution | 3 |
| Installation Altitude | Up to 2,000 meters above sea level |
| Ambient Operating Temperature | -25 … +60 °C |
| Mechanical Operating Cycles | 10,000,000 typical for contactor, 5,000,000 typical for contactor with electronics-compatible auxiliary switch block |
| Main Circuit Contacts | 0 NC (Normally Closed), 3 NO (Normally Open) |
| Operating Current at AC-1 | 40 A at 400 V |
| Operating Current at AC-3 | 17 A at 400 V |
| Operating Current at AC-4 | 15.5 A at 400 V |
| Service Power at AC-2 | 7.5 kW at 400 V |
| Service Power at AC-3 | 7.5 kW at 400 V |
| Service Power at AC-4 | 7,500 W at 400 V |
| Control Circuit Voltage Type | AC |
| Operating Range Factor | 0.8 … 1.1 for AC at 50/60 Hz |
| Apparent Pull-in Power | 64 V·A for AC |
| Apparent Holding Power | 8.4 V·A for AC |
| Inductive Power Factor | 0.72 with the pull-in power of the coil |
| Auxiliary Circuit Reliability | 1 faulty switching per 100 million (17 V, 1 mA) |
| Commodity Code | 853649 |
The Siemens 3RT1025-1AL20 is a robust power contactor designed to handle high switching frequencies with reliability and efficiency. Engineered for a wide range of applications, this contactor is an essential component for motor control and automation tasks. It features three poles and three normally open (NO) contacts, making it suitable for various circuit configurations.
With a rated operating current of 17 A at AC-3 and a power rating of 7.5 kW at 400 V, the 3RT1025-1AL20 is capable of managing significant electrical loads. The contactor operates with a control voltage of 230 V AC and is compatible with both 50 and 60 Hz power systems, offering versatility for international use.
The compact size S0 frame of the contactor ensures it fits seamlessly into electrical cabinets, while the screw connection terminals provide a secure and durable connection. The device is designed with a mechanical service life of up to 10 million operating cycles, highlighting its durability and long-term performance.
This Siemens contactor is also characterised by its IP20 protection class on the front, ensuring a basic level of protection against solid objects. With an ambient operating temperature range of -25 to +60 degrees Celsius and the ability to function up to 2,000 meters above sea level, it is suitable for challenging industrial environments.
The 3RT1025-1AL20 is a reliable choice for professionals seeking a high-quality contactor that delivers consistent performance and operational longevity. Whether it's for starting motors, controlling heating loads, or managing lighting systems, this contactor is engineered to meet the demands of modern industrial applications.
Commonly Asked Questions
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Marvo provides a full 12-month warranty on all products, whatever the condition. For your peace of mind, all parts are ‘Marvo Approved’ which means that they have been tested and checked to ensure that they are in working condition. If you are unhappy with the part(s) you received and would like to request a return, you can do so by completing our quick and easy online form. Once we have received your Returns Request, a member of the team will be in touch to discuss this further with you. You can read more about our warranty policy here.
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Frequently Asked Questions
What are the main characteristics of this power contactor?
This power contactor is a 3-pole device with 3 normally open (NO) contacts, rated for AC-3 17 A and capable of handling 7.5 kW at 400 V. It operates with a control voltage of 230 V AC at 50/60 Hz and is of size S0.
Can this contactor be used in a vertical mounting position?
Yes, the contactor is designed to allow for vertical mounting, ensuring flexibility in installation.
What is the IP protection class of this contactor?
The contactor has an IP20 protection class rating on the front, providing a basic level of protection against solid objects.
What is the expected mechanical operating life of this contactor?
The mechanical operating life of the contactor is typically around 10 million operating cycles, ensuring a long service life for standard applications.
How does ambient temperature affect the operation of this contactor?
The contactor can operate within an ambient temperature range of -25 to +60 degrees Celsius, making it suitable for a variety of environmental conditions.
What is the degree of pollution for this contactor?
The contactor has a degree of pollution rating of 3, which indicates that it is designed to operate in environments where conductive pollution or dry non-conductive pollution occurs and must be considered.
What are the dimensions and weight of this contactor?
For specific dimensions and weight details, please refer to the product datasheet or contact us directly for further information.
Is this contactor suitable for DC applications?
While primarily designed for AC applications, the contactor does have DC ratings. Please consult the product datasheet for detailed DC operating characteristics.
What certifications does this contactor have?
The contactor comes with general product approvals and conforms to relevant standards. For a complete list of certifications, please refer to the product documentation.
Can auxiliary contacts be added to this contactor?
Yes, auxiliary contacts can be added to the contactor. It is designed to be compatible with additional auxiliary switch blocks for enhanced functionality.
