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Siemens
3RT1025-1KB40
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Specification & Description
| Specification | Description |
|---|---|
| Part Number | 3RT1025-1KB40 |
| Alternative Part Number | 3RT10251KB40 |
| Manufacturer | Siemens |
| Product Type | Power Contactor |
| Contactor Size | S0 |
| Rated Operational Current (AC-3) | 17 A at 400 V |
| Rated Operational Current (AC-1) | 40 A at 400 V |
| Rated Control Supply Voltage | 24 V DC |
| Operating Voltage Range | 0.7 to 1.25 times the rated control supply voltage |
| Surge Suppressor | With varistor |
| Number of Poles | 3-pole |
| Connection Type | Screw-type terminals |
| Mounting Type | Screw and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 50022 |
| Width | 45 mm |
| Height | 88 mm |
| Depth | 101 mm |
| Ambient Operating Temperature | -25 to +60 °C |
| Mechanical Operating Cycles | Typical 10,000,000 |
| Protection Class IP | IP20 on the front |
| Degree of Pollution | 3 |
| Installation Altitude | Up to 2,000 m above sea level |
The Siemens 3RT1025-1KB40 is a robust power contactor designed to handle moderate power switching applications within industrial environments. This contactor is part of the SIRIUS product family, renowned for its reliability and efficiency in automating processes. With a size S0 footprint, it is compact enough for standardised installation yet powerful enough to manage AC-3 loads up to 17 A and motor control tasks for motors with power ratings up to 7.5 kW at 400 V.
Engineered for durability, the 3RT1025-1KB40 boasts an impressive mechanical operating life, capable of up to 10 million cycles, making it a long-lasting solution for frequent switching operations. The contactor operates with a control supply voltage of 24 V DC and features an integrated varistor for surge suppression, ensuring stable operation and protection against voltage spikes.
The device is designed with three normally open (NO) main contacts and allows for easy connection with screw-type terminals, accommodating a range of conductor cross-sections. It is suitable for mounting on a 35 mm standard mounting rail according to DIN EN 50022, and its side-by-side mounting capability allows for efficient use of space inside control cabinets.
With an operating temperature range of -25 to +60 °C and the ability to function at installation altitudes up to 2000 metres above sea level, the 3RT1025-1KB40 is versatile for various industrial settings. Its IP20 protection class ensures that the contactor is safeguarded against solid objects larger than 12.5 mm, adding to its operational safety.
The Siemens 3RT1025-1KB40 is a dependable choice for those seeking a contactor that combines compact design with the power to perform in demanding industrial applications.
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Frequently Asked Questions
What is the rated operating current for this contactor in an AC-3 utilisation category?
The rated operating current for the contactor in an AC-3 utilisation category at 400 V is 17 A.
Can this contactor be mounted on a DIN rail?
Yes, the contactor is designed for screw and snap-on mounting onto a 35 mm standard mounting rail according to DIN EN 50022.
What is the protection class of the contactor's front side?
The front side of the contactor has a protection class of IP20.
What is the ambient temperature range for operating this contactor?
The contactor can operate within an ambient temperature range of -25 to +60 degrees Celsius.
What are the dimensions of this contactor?
The contactor has dimensions of 45 mm in width, 88 mm in height, and 101 mm in depth.
What type of electrical connection does this contactor have for the main circuit?
The contactor features screw-type terminals for the electrical connection of the main circuit.
How many mechanical operating cycles can this contactor typically withstand?
The contactor is typically rated for 10,000,000 mechanical operating cycles.
What is the coil voltage for this contactor?
The coil voltage for this contactor is 24 V DC.
Does this contactor come with a built-in surge suppressor?
Yes, the contactor includes a built-in surge suppressor with a varistor.
What is the maximum installation altitude for this contactor?
The maximum installation altitude for the contactor is 2,000 metres above sea level.
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