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Specification & Description
| Specification | Description |
|---|---|
| Part Number | 3RT2037-1AB04 |
| Alternative Part Number | 3RT20371AB04 |
| Manufacturer | Siemens |
| Product Brand Name | SIRIUS |
| Product Designation | Power Contactor |
| Product Type Designation | 3RT2 |
| Size of Contactor | S2 |
| Rated Operating Voltage (AC-3) | Up to 690 V |
| Rated Operating Current (AC-1) | 80 A at 400 V |
| Rated Operating Current (AC-3) | 65 A at 400 V |
| Rated Control Supply Voltage (AC) | 24 V at 50 Hz |
| Number of Poles | 3 |
| Number of Main Contacts (NO) | 3 |
| Number of Auxiliary Contacts (NC) | 2 |
| Number of Auxiliary Contacts (NO) | 2 |
| Operating Power at AC-3 | 30 kW at 400 V |
| Operating Frequency | Up to 700 1/h at AC-3 |
| Mechanical Service Life | 10,000,000 switching cycles |
| Shock Resistance | 9.8g / 5 ms, 6.5g / 10 ms at AC |
| Ambient Operating Temperature | -25 ... +60 °C |
| Installation Altitude | Up to 2000 m above sea level |
| Protection Class | IP20 on the front |
| Insulation Voltage | 690 V with degree of pollution 3 |
| Surge Voltage Resistance | 6 kV for main and auxiliary circuits |
| Short-time Withstand Current | 1,055 A for 1 s in cold operating state up to 40 °C |
| No-load Switching Frequency | 5,000 1/h at AC |
| Connectable Conductor Cross-section | Main contacts: 1 ... 50 mm², Auxiliary contacts: 0.5 ... 2.5 mm² |
| Mounting Position | +/-180° rotation possible on vertical mounting surface; can be tilted +/- 22.5° |
| Fastening Method | Screw and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 60715 |
| Dimensions (H x W x D) | 114 mm x 55 mm x 174 mm |
The Siemens 3RT2037-1AB04 is a robust power contactor designed to handle high switching capacities in industrial environments. This contactor is part of the SIRIUS product family, renowned for its reliability and efficiency in automating and controlling motors. With a size S2 frame, the 3RT2037-1AB04 is engineered to manage AC-3 loads up to 65 A and motor control for power ratings of 30 kW at 400 V.
This contactor features a 3-pole configuration with 3 normally open (NO) contacts for main operations, ensuring a secure connection for your main current circuit. Additionally, it includes 2 normally open (NO) and 2 normally closed (NC) auxiliary contacts for instantaneous actions, providing flexibility for various control and signalling functions.
The 3RT2037-1AB04 operates with a control supply voltage of 24 V AC at 50 Hz and is designed with screw terminals for secure and reliable connections. It boasts a mechanical service life of up to 10 million switching cycles, highlighting its durability and long-term performance.
The compact design allows for efficient use of space within control cabinets, and the device can be mounted onto a 35 mm standard mounting rail according to DIN EN 60715, with the option for side-by-side mounting. It is also designed to withstand challenging environmental conditions, with an operational temperature range of -25 to +60 °C and storage temperature range of -55 to +80 °C.
The Siemens 3RT2037-1AB04 is a testament to high-quality engineering, providing a dependable solution for controlling motors and loads in a wide range of industrial applications.
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Frequently Asked Questions
What is the size of the contactor?
The contactor is of size S2, which is a designation used to specify the physical and electrical characteristics of the contactor.
Can this contactor be used for communication functions?
No, this model does not support function modules for communication.
What is the power loss for this contactor at its rated current?
At AC in a hot operating state, the power loss for the rated value of the current is approximately 11.4 W, with 3.8 W per pole.
What is the surge voltage resistance of the main and auxiliary circuits?
Both the main and auxiliary circuits have a surge voltage resistance rated at 6 kV.
What is the maximum permissible voltage for safe isolation between the coil and main contacts?
The maximum permissible voltage for safe isolation between the coil and main contacts, according to EN 60947-1, is 400 V.
What are the operating and installation conditions for this contactor?
The contactor can be operated within an ambient temperature range of -25 to +60 °C and can be mounted in any position with a +/-180° rotation on a vertical mounting surface. It can also be tilted forward and backward by +/- 22.5°.
What type of electrical connections does the contactor have?
The contactor is equipped with screw-type terminals for both the main current circuit and the auxiliary and control current circuit.
What are the dimensions required for mounting the contactor?
The contactor requires a height of 114 mm, a width of 55 mm, and a depth of 174 mm for mounting. Additionally, certain clearances are required for side-by-side mounting and for parts that are live or grounded.
What is the mechanical service life of the contactor?
The mechanical service life of the contactor is typically 10 million switching cycles, which indicates its durability and longevity in applications.
Is the contactor suitable for use in safety-related applications?
Yes, the contactor is suitable for safety-related switching OFF applications, ensuring reliable operation in critical systems.
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