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Specification & Description
| Specification | Description |
|---|---|
| Part Number | 3RT2018-1BB42 |
| Alternative Part Number | 3RT20181BB42 |
| Manufacturer | Siemens |
| Product Type | Power Contactor |
| Contactor Size | S00 |
| Rated Operational Current AC-3 | 16 A |
| Rated Operational Voltage | Up to 690 V |
| Control Supply Voltage | 24 V DC |
| Number of Main Contacts | 3NO (3 Normally Open) |
| Number of Auxiliary Contacts | 1NC (1 Normally Closed) |
| Terminal Type | Screw terminals |
| Mounting Type | Can be mounted on 35 mm DIN rail or screwed onto panel |
| Protection Class | IP20 |
| Ambient Operating Temperature | -25 °C to +60 °C |
| Installation Altitude | Up to 2000 metres above sea level |
| Degree of Pollution | 3 |
| Mechanical Operating Cycles | Typically 30 million |
| Product Extensions | Auxiliary switch possible |
| Electrical Connection | Screw-type terminals for main, auxiliary, and control circuit; magnet coil also screw-type |
| Shock Resistance | 7.3g / 5 ms, 4.7g / 10 ms (DC rectangular impulse); 11.4g / 5 ms, 7.3g / 10 ms (DC sine pulse) |
| Insulation Voltage | Rated at 690 V |
| Impulse Voltage Resistance | Rated at 6 kV |
The Siemens 3RT2018-1BB42 is a robust power contactor designed to handle high switching loads in industrial environments. This contactor is part of the SIRIUS product family, renowned for its reliability and efficiency. With a compact size S00 footprint, it is engineered to facilitate easy installation and maintenance.
This power contactor is capable of managing AC-3 loads up to 16 A and motor control tasks for motors with a power rating of 7.5 kW at 400 V. It features a single normally closed (NC) contact, making it suitable for a variety of applications where a fail-safe operation is required. The device operates with a control supply voltage of 24 V DC, ensuring compatibility with standard DC control circuits.
Constructed with screw terminals, the 3RT2018-1BB42 ensures a secure and durable connection, which is vital for consistent performance in demanding conditions. The contactor is designed with a protection class of IP20, offering protection against touch by fingers and objects, and is suitable for use in controlled environments.
The contactor's mechanical service life is impressive, with up to 30 million switching cycles, indicating a long-lasting and dependable performance. Its design also allows for auxiliary switch additions, providing flexibility for various control and signalling configurations.
Engineered to meet the rigorous demands of industrial applications, the Siemens 3RT2018-1BB42 power contactor is an excellent choice for those seeking a reliable solution for controlling motors and other electrical loads.
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Frequently Asked Questions
What is the rated operational voltage for this contactor?
The rated operational voltage for the Siemens Power Contactor is 690 V.
Can this contactor be used for safety-related applications?
Yes, the contactor has a mirror contact feature according to IEC 60947-4-1, making it suitable for safety-related applications.
What is the size of the contactor and what does it mean?
The contactor is of size S00, which refers to its physical dimensions and the current rating it is designed to handle.
What type of terminals does this contactor have?
The contactor is equipped with screw terminals for secure and reliable connections.
What is the IP rating of this contactor?
The contactor has an IP20 rating, indicating protection against solid objects larger than 12mm but not against liquids.
What is the rated control supply voltage for this device?
The rated control supply voltage for the contactor is 24 V DC.
How many auxiliary contacts does this contactor have?
This contactor comes with 1 normally closed (NC) auxiliary contact.
What is the typical mechanical operating life of this contactor?
The typical mechanical operating life of the contactor is around 30 million operating cycles.
Is this contactor suitable for three-phase motor control?
Yes, it is suitable for controlling three-phase motors, with different horsepower ratings depending on the voltage.
What are the ambient temperature limits for operating this contactor?
The contactor can operate within an ambient temperature range of -25 °C to +60 °C.
Part conditions explained
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