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Specification & Description
| Specification | Description |
|---|---|
| Part Number | 3RT2025-1DB44-3MA0 |
| Alternative Part Number | 3RT20251DB443MA0 |
| Manufacturer | Siemens |
| Voltage | 24 V dc |
| Power Rating | 40 kW |
| Current Rating | 40 A |
| Number of Poles | 3 Poles |
| Contactor Size | Size S0 |
| Operational Current at AC-1 | 40 A at 400 V |
| Operational Current at AC-3 | 17 A at 400 V |
| Rated Control Circuit Voltage | 24 V DC |
| Mechanical Service Life | 10 million switching cycles for contactor |
| Protection Class | IP20 on the front |
| Ambient Operating Temperature | -25 to +60 °C during operation |
| Installation Altitude | Up to 2000 m above sea level |
| Shock Resistance | 10g / 5 ms, 7.5g / 10 ms at DC for rectangular impulse; 15g / 5 ms, 10g / 10 ms at DC for sine pulse |
| Insulation Voltage | Rated at 690 V |
| Auxiliary Contacts | 2 NO (Normally Open) + 2 NC (Normally Closed) |
| Connection Type | Screw-type terminals for main and auxiliary circuits |
The Siemens 3RT2025-1DB44-3MA0 is a robust power contactor designed to handle a variety of applications in industrial environments. This contactor is engineered to control motors and loads efficiently within an AC-3 utilisation category, making it suitable for starting and stopping AC motors. It boasts a 7.5 kW power rating at 400 V and can manage operational currents up to 17 A, ensuring reliable performance for a wide range of machinery.
Crafted with precision, the contactor features three poles and comes equipped with 2 normally open (NO) and 2 normally closed (NC) auxiliary contacts, providing flexibility for integration into various control circuits. The 24 V DC control voltage, complemented by an integrated varistor, ensures smooth operation and protection against voltage spikes.
The contactor's size S0 footprint allows for efficient use of space inside control cabinets, while the screw terminal connections offer a secure and durable means of installation. With a mechanical service life of up to 10 million operating cycles, this contactor is built to last and maintain its functionality over an extended period, reducing the need for frequent replacements.
The Siemens 3RT2025-1DB44-3MA0 is designed with user safety in mind, featuring finger-safe protection and an IP20 rating for the front of the device, which guards against the ingress of solid objects. Its compliance with international standards ensures it can be confidently integrated into systems worldwide.
Overall, this power contactor is a reliable and efficient solution for controlling electric motors and is an excellent choice for those seeking a high-quality component for their industrial automation needs.
Commonly Asked Questions
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Marvo is a highly credible supplier of industrial automation parts and components with dedicated hubs around the world offering industry-leading products and services. Marvo is committed to providing a quick, easy and reliable place to source your automation and control components. All purchases come as standard with a comprehensive 12-month return to base warranty meaning that, in just a few clicks, you can source critical parts more seamlessly than ever before. Click here to read an article on how Marvo is redefining convenience for automation and manufacturing professionals.
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Frequently Asked Questions
What is the rated control supply voltage of this power contactor?
The rated control supply voltage for this power contactor is 24 V DC.
Can this contactor be used for safety-related switching off?
Yes, the Siemens 3RT2025-1DB44-3MA0 is suitable for safety-related switching off applications.
What is the size of this contactor and how can it be mounted?
This contactor is of size S0 and can be mounted by screw and snap-on mounting onto a 35 mm standard mounting rail according to DIN EN 60715.
What is the maximum operating voltage for this contactor in AC-3 utilisation category?
The maximum operating voltage for this contactor in AC-3 utilisation category is 690 V.
What are the main contactor ratings for a three-phase AC motor?
For a three-phase AC motor, the contactor ratings are 3 hp at 200/208 V, 5 hp at 220/230 V, 10 hp at 460/480 V, and 15 hp at 575/600 V.
What type of electrical connection does this contactor have?
This contactor features screw-type terminals for both the main current circuit and the auxiliary and control current circuit.
What is the protection class of the front side of the contactor?
The front side of the contactor has a protection class of IP20.
What is the mechanical service life of this contactor?
The mechanical service life of the contactor is typically 10 million switching cycles.
What are the dimensions of this contactor?
The dimensions of the contactor are 85 mm in height, 45 mm in width, and 151 mm in depth.
Does this contactor have mirror contacts according to IEC 60947-4-1?
Yes, it does have mirror contacts according to IEC 60947-4-1.
Part conditions explained
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New unsealed: The product is in its original packaging, but the packaging has been opened or unsealed. It has never been used and should be in near pristine condition.
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Used: The product has been previously owned and has been used. It may show signs of wear and tear but is still functional and operational. The condition may vary depending on the specific item and its usage history.
