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Specification & Description
| Specification | Description |
|---|---|
| Part Number | 3RT1056-1AB36 |
| Alternative Part Number | 3RT10561AB36 |
| Manufacturer | Siemens |
| Product Type | Power Contactor |
| Size of Contactor | S6 |
| Protection Class IP | Front: IP00 |
| Degree of Pollution | 3 |
| Installation Altitude | Up to 2,000 metres above sea level |
| Ambient Operating Temperature | -25°C to +60°C |
| Mechanical Operating Cycles | 10,000,000 typical for contactor |
| Number of Poles | 3 |
| Number of Main Contacts | 3 NO (Normally Open) |
| Operational Current at AC-3 | 185 A at 400 V |
| Operational Current at AC-1 | 215 A at 400 V at 40°C ambient temperature |
| Control Supply Voltage | AC/DC operation 23-26 V UC |
| Auxiliary Contacts | 2 NO + 2 NC |
| Mounting Type | Screw fixing, side-by-side mounting possible |
| Dimensions (H x W x D) | 172 mm x 120 mm x 170 mm |
| Required Spacing | Forwards: 20 mm, Upwards/Downwards: 10 mm, At the side: 0 mm for side-by-side mounting |
| Electrical Connection | Box terminal for main current circuit, Screw-type terminals for auxiliary/control current circuit |
| Conductor Cross-Section | Main contacts: max. 1x 95, 1x 120 mm² |
| Operating Power at AC-3 | 90 kW at 400 V |
| Short-Time Withstand Current | Up to 2,900 A for 1 s at 40°C cold operating state |
| Surge Voltage Resistance | Main circuit: 8 kV, Auxiliary circuit: 6 kV |
| Maximum Voltage for Safe Isolation | 690 V between coil and main contacts according to EN 60947-1 |
The Siemens 3RT1056-1AB36 is a robust power contactor designed to handle high current applications with ease. Engineered for reliability and efficiency, this contactor is capable of switching motor loads of up to 90 kW at 400 V in AC-3 utilisation categories, making it an ideal choice for a wide range of industrial applications. Its AC/DC operation with a control supply voltage of 23-26 V ensures versatility in various power network configurations.
This contactor is part of the SIRIUS product family, known for its high-quality standards and innovative engineering. It features three poles and includes auxiliary contacts with 2 normally open (NO) and 2 normally closed (NC) contacts, providing additional flexibility for control circuit configurations. The device is designed with a size S6 frame and offers convenient bar connection points for straightforward installation.
With a mechanical service life of up to 10 million operating cycles, the Siemens 3RT1056-1AB36 is built to last, ensuring long-term performance and minimal maintenance. Its compact dimensions and the ability to mount side-by-side make it a space-saving solution in electrical cabinets. The contactor also boasts a high degree of protection for the front terminals, rated at IP20, ensuring safety and durability in challenging industrial environments.
The Siemens 3RT1056-1AB36 is a testament to Siemens' commitment to quality and performance, providing a reliable and efficient solution for controlling high-power motors and loads in industrial settings.
Commonly Asked Questions
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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 this contactor in an AC-3 utilisation category at 400 V is 185 A.
Can this contactor be used for both AC and DC operations?
Yes, this contactor is designed for AC (50-60 Hz) and DC operation with a control supply voltage of 23-26 V UC.
What are the dimensions of this contactor?
The dimensions of the contactor are 172 mm in height, 120 mm in width, and 170 mm in depth.
What is the maximum operating voltage for this contactor in an AC-3 category?
The maximum operating voltage for this contactor in an AC-3 category is 1,000 V.
What type of auxiliary contacts does this contactor have?
This contactor is equipped with 2 normally open (NO) and 2 normally closed (NC) auxiliary contacts.
What is the mechanical service life of this contactor?
The mechanical service life of the contactor is typically 10 million operating cycles.
What is the protection class for the front of this contactor?
The protection class for the front of this contactor is IP00.
What is the power loss at the rated value of the current for this contactor?
The power loss at the rated value of the current for this contactor is 39 W in a hot operating state.
What is the installation altitude limit for this contactor?
The installation altitude limit for this contactor is up to 2,000 metres above sea level.
What is the ambient operating temperature range for this contactor?
The ambient operating temperature range for this contactor is between -25 °C and +60 °C.
Part conditions explained
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