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Specification & Description
| Specification | Description |
|---|---|
| Part Number | 3RT2023-2BB44 |
| Alternative Part Number | 3RT20232BB44 |
| Manufacturer | Siemens |
| Product Type | Contactor |
| Contactor Size | S0 |
| Number of Poles | 3-pole |
| Auxiliary Contacts | 2NO+2NC (Normally Open + Normally Closed) |
| Operating Voltage | AC-3, 4KW/400V |
| Control Circuit Voltage | DC 24V |
| Terminal Type | Spring-loaded terminal, removable |
| 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 | At DC 10g / 5 ms, 7.5g / 10 ms (rectangular impulse), 15g / 5 ms, 10g / 10 ms (sine pulse) |
| Impulse Voltage Resistance | Rated value 6 kV |
| Insulation Voltage | Rated value 690 V |
| Mounting Position | +/-180° rotation possible on vertical mounting surface; can be tilted +/- 22.5° |
| Mounting Type | Screw and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 50022 |
| Width | 45 mm |
| Height | 102 mm |
| Depth | 155 mm |
| Safety Related Data | B10 value with high demand rate according to SN 31920: 1,000,000 |
| T1 Value | For proof test interval or service life according to IEC 61508: 20 years |
| Proportion of Dangerous Failures | With low demand rate according to SN 31920: 40%, with high demand rate: 73% |
| Failure Rate | With low demand rate according to SN 31920: 100 FIT |
| Product Function | Mirror contact to IEC 60947-4-1, positively driven operation to IEC 60947-5-1: No |
| Certificates/Approvals | General Product Approval, EMC, KC, Functional Safety/Safety of Machinery, etc. |
The Siemens 3RT2023-2BB44 is a robust and versatile power contactor designed to handle a variety of switching tasks in industrial applications. This model is part of the SIRIUS product line, renowned for its reliability and efficiency in controlling motors and loads. The contactor is engineered to manage AC-3 loads up to 9 A and motor power up to 4 kW at 400 V, making it suitable for a wide range of applications.
Featuring a compact size S0 footprint, the 3RT2023-2BB44 is equipped with 2 normally open (NO) and 2 normally closed (NC) contacts, providing flexibility for integration into various control circuits. The unit operates with a control voltage of 24 V DC and includes spring-type terminals for a secure and maintenance-free electrical connection.
The contactor is designed with a high insulation voltage of 690 V and a surge voltage resistance rated at 6 kV, ensuring robust performance even in demanding environments. It also boasts a mechanical service life of up to 10 million switching cycles, highlighting its durability and long-term operational stability.
Installation is made easy with options for screw and snap-on mounting onto a 35 mm standard mounting rail according to DIN EN 60715. The device can be mounted in various positions and is capable of being rotated +/-180° on a vertical mounting surface, with the ability to tilt forward and backward by +/- 22.5°, offering flexibility in tight spaces.
The Siemens 3RT2023-2BB44 is a reliable choice for those seeking a high-quality contactor that delivers consistent performance and adaptability for a range of industrial switching applications.
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Frequently Asked Questions
What type of contactor is this?
This is an AC-3 category contactor suitable for controlling motors, with a control voltage of DC 24V. It features 2 normally open (NO) and 2 normally closed (NC) contacts, and is a 3-pole device with spring-loaded terminals.
Can this contactor be used for communication functions?
No, this contactor does not have a function module for communication. It is designed for basic switching operations.
What is the size of the contactor?
The contactor is of size S0, which is a standard size within the Siemens SIRIUS range, making it suitable for a variety of industrial applications.
What is the IP protection class of the contactor?
The contactor has an IP20 protection class on the front, ensuring protection against solid objects larger than 12mm but not against water.
What is the maximum operating altitude for this contactor?
The contactor can be operated at a maximum altitude of 2,000 metres above sea level without derating.
What are the ambient temperature ranges for storage and operation?
The contactor can be stored in temperatures ranging from -55°C to +80°C and can operate in temperatures from -25°C to +60°C.
What certifications does the contactor have?
The contactor comes with general product approval and has certifications for EMC compliance. It also has various other approvals and declarations of conformity, which can be provided upon request.
What are the dimensions of the contactor?
The contactor has a width of 45mm, a height of 102mm, and a depth of 155mm, making it compact for its capabilities.
How is the contactor mounted?
The contactor can be mounted by screw and snap-on mounting onto a 35mm standard mounting rail according to DIN EN 50022. It allows for a +/-180° rotation on a vertical mounting surface and can be tilted forward and backward by +/- 22.5°.
What is the insulation voltage rating of the contactor?
The contactor has an insulation voltage rating of 690V, which is the rated value for the insulation voltage.
What is the impulse voltage resistance of the contactor?
The contactor has an impulse voltage resistance rated at 6kV.
Can this contactor be used in series installation?
Yes, the contactor is designed for series installation, allowing for efficient use of space within control cabinets.
What is the B10 value for this contactor?
The B10 value, which indicates the number of operating cycles until 10% of components may fail, is 1,000,000 for this contactor when used with a high demand rate according to SN 31920.
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