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Specification & Description
| Specification | Description |
|---|---|
| Part Number | 3RT2025-1BB44-3MA0 |
| Alternative Part Number | 3RT20251BB443MA0 |
| Manufacturer | Siemens |
| Product Type | Power Contactor |
| Contactor Size | S0 |
| Rated Operational Voltage | AC-3, 7.5 kW/400 V |
| Auxiliary Contacts | 2NO+2NC |
| Coil Voltage | DC 24 V |
| Number of Poles | 3-Pole |
| Terminal Type | Screw Terminal |
| Auxiliary Switch | Permanent for SUVA applications |
| Protection Class IP | IP20 |
| Pollution Degree | 3 |
| Installation Altitude | Up to 2,000 metres above sea level |
| Ambient Temperature Range | -25 … +60 °C (operating), -55 … +80 °C (storage) |
| Shock Resistance | 10g / 5 ms, 7.5g / 10 ms (rectangular impulse at DC), 15g / 5 ms, 10g / 10 ms (sine pulse at DC) |
| Impulse Voltage Resistance | 6 kV |
| Insulation Voltage | 690 V |
| Mechanical Operating Cycles | Typically 10,000,000 |
| Mounting Type | Screw and snap-on mounting onto 35 mm standard mounting rail |
| Dimensions (H x W x D) | 85 mm x 45 mm x 151 mm |
| Connectable Conductor Cross-section | 1 … 10 mm² (solid, stranded, finely stranded with core end processing) |
| Safety Features | Finger-safe, mirror contact according to IEC 60947-4-1 |
The Siemens 3RT2025-1BB44-3MA0 is a robust power contactor designed to handle high switching frequencies with reliability and precision. Engineered for AC-3 applications, this contactor is capable of managing motors with a power rating of 7.5 kW at 400 V. It features a compact size S0 footprint, making it suitable for integration into various industrial control systems where space is at a premium.
This contactor comes equipped with 2 normally open (NO) and 2 normally closed (NC) contacts, providing flexibility for a range of circuit configurations. The DC 24V control voltage ensures low power consumption and compatibility with standard DC control circuits. The screw terminal connections offer a secure and durable means of integrating the contactor into your system.
With a finger-safe design and an IP20 protection class rating on the front, the 3RT2025-1BB44-3MA0 ensures safety during operation and maintenance. It is designed to withstand challenging environmental conditions, with an operational temperature range from -25 °C to +60 °C and storage temperature capabilities from -55 °C to +80 °C. The contactor can also be installed at altitudes up to 2,000 meters without derating, making it versatile for various industrial settings.
The mechanical operating life of this contactor is impressive, with up to 10 million operating cycles, indicating its durability and long service life. Additionally, the contactor's shock resistance and impulse voltage resistance are testament to its robustness in industrial environments subject to electrical disturbances.
Siemens' commitment to quality and reliability is evident in the 3RT2025-1BB44-3MA0, making it a preferred choice for professionals seeking a dependable solution for controlling power circuits in industrial applications.
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Frequently Asked Questions
What is the size of the contactor?
The contactor is of size S0, which is a standard size for this type of device, allowing for compatibility with various installations.
Can this contactor be used with auxiliary switches?
Yes, the contactor is designed to be used with permanent auxiliary switches, although it does not come with an auxiliary switch as a product extension.
What is the IP protection class of the contactor?
The contactor has an IP20 protection class on the front, providing a degree of protection against solid objects but not liquids.
What are the operating and storage temperature ranges for this contactor?
The operating temperature range is from -25°C to +60°C, and the storage temperature range is from -55°C to +80°C.
What is the rated insulation voltage for this contactor?
The rated insulation voltage for the contactor is 690V.
How many mechanical operating cycles can this contactor withstand?
The contactor is designed to withstand typically 10 million mechanical operating cycles.
What is the control supply voltage for this contactor?
The control supply voltage for the contactor is DC 24V.
What is the maximum installation altitude for this contactor?
The maximum installation altitude for the contactor is 2,000 meters above sea level.
Does this contactor have a mirror contact feature?
Yes, the contactor includes a mirror contact feature according to IEC 60947-4-1.
What are the dimensions of the contactor?
The contactor has a width of 45mm, a height of 85mm, and a depth of 151mm.
Can this contactor be mounted on a DIN rail?
Yes, it can be mounted on a 35mm standard mounting rail according to DIN EN 50022.
What are the contact ratings for this contactor according to UL standards?
According to UL standards, the contact ratings for auxiliary contacts are designated as A600/Q600.
Is the contactor suitable for safety-related switching off?
Yes, the contactor is suitable for safety-related switching off applications.
