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Specification & Description
| Specification | Description |
|---|---|
| Part Number | 3RT2025-1BB44 |
| Alternative Part Number | 3RT20251BB44 |
| Manufacturer | Siemens |
| Rated Operational Voltage | AC-3 400 V |
| Control Circuit Voltage | 24 V DC |
| Rated Operational Current | AC-3: 17 A |
| Power Rating | 7.5 kW |
| Number of Poles | 3 Poles |
| Auxiliary Contacts | 2 NO + 2 NC |
| Terminal Type | Screw Terminal |
| Size | S0 |
| Degree of Protection | IP20 on the front |
| Ambient Temperature Range | -25 … +60 °C |
| Mechanical Service Life | Typical 10,000,000 switching cycles |
| Insulation Voltage | Rated at 690 V |
| Installation Altitude | Maximum 2,000 m above sea level |
| Shock Resistance | At DC 10g / 5 ms, 7.5g / 10 ms |
| Impulse Voltage Resistance | Rated value 6 kV |
| Protection Against Electric Shock | Finger-safe |
| Degree of Pollution | 3 |
| Mounting Type | Screw and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 50022 |
The Siemens 3RT2025-1BB44 is a robust power contactor designed to handle a variety of applications within industrial environments. This contactor is engineered to control motors and loads efficiently, with a rated operational current of 40 A and an AC-3 power rating of 7.5 kW at 400 V. It features a three-pole design and is equipped with 24 V DC coil voltage, making it suitable for DC control systems.
The unit comes with integrated auxiliary contacts, offering 2 normally open (NO) and 2 normally closed (NC) contacts, which are useful for implementing control logic circuits. The screw terminal connection ensures a secure and reliable installation. With a size S0 footprint, it is compact enough to fit in standard control cabinets while providing ample power handling capabilities.
Designed with a focus on durability, the Siemens 3RT2025-1BB44 boasts a mechanical service life of millions of operating cycles, ensuring long-term reliability in demanding industrial settings. Its construction adheres to a pollution degree of 3 and offers a protection class of IP20 on the front, safeguarding the device from solid objects and facilitating its use in various environmental conditions.
This contactor is a preferred choice for professionals seeking a high-quality solution for motor control and switching applications, offering both performance and reliability in a compact package.
Commonly Asked Questions
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Frequently Asked Questions
What type of contactor is this?
This is a power contactor designed for switching an electrical power circuit, similar to a relay but with higher current ratings, and is used for controlling electric motors and lighting loads.
What are the voltage specifications for this contactor?
The contactor operates with a control supply voltage of 24 V DC and is suitable for switching motors up to 7.5 kW at 400 V in AC-3 applications.
How many poles does this contactor have?
The contactor is a 3-pole device, which means it can switch three phases simultaneously.
What are the auxiliary contact configurations?
This contactor comes with 2 normally open (NO) and 2 normally closed (NC) auxiliary contacts.
Can this contactor be used in safety-related applications?
While the contactor does have a mirror contact feature according to IEC 60947-4-1, it is not positively driven according to IEC 60947-5-1, which should be considered when planning for safety-related applications.
What is the size of this contactor?
The contactor is of size S0, which is a standard size classification for Siemens contactors.
What is the mechanical service life of this contactor?
The mechanical operating cycles as operating time of the contactor is typically around 10 million cycles.
What type of terminal does this contactor have?
This contactor is equipped with screw terminals for secure and reliable connections.
What is the rated operational current for this contactor?
The rated operational current for this contactor in AC-3 usage is 17 A.
What certifications does this contactor hold?
The contactor has general product approvals and conforms to standards, which may include but are not limited to EMC and KC certifications.
