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Specification & Description
| Specification | Description |
|---|---|
| Part Number | 3RT2518-1BB40 |
| Alternative Part Number | 3RT25181BB40 |
| Manufacturer | Siemens |
| Product Type | Contactor |
| Size of Contactor | S00 |
| Number of Poles | 4-Pole |
| Contact Configuration | 2NO+2NC (2 Normally Open, 2 Normally Closed) |
| Rated Control Supply Voltage | DC 24V |
| Operating Current at AC-3 | 7.5 kW |
| Rated Insulation Voltage | 690 V |
| Surge Voltage Resistance | 6 kV |
| Protection Class IP | IP20 |
| Degree of Pollution | 3 |
| Installation Altitude | Up to 2,000 metres above sea level |
| Ambient Temperature Range | -25 … +60 °C (during operation), -55 … +80 °C (during storage) |
| Shock Resistance | 7.3g / 5 ms, 4.7g / 10 ms (at DC) |
| Mechanical Operating Cycles | Typically 30,000,000 |
| Mounting Type | Screw and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 50022 |
| Electrical Connection | Screw-type terminals for main current circuit and auxiliary/control circuit |
| Connectable Conductor Cross-Sections | For main contacts: 2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), 2x 4 mm² |
| UL/CSA Ratings | Mechanical performance (hp) for three-phase squirrel cage motors: 5 hp at 220/230 V, 10 hp at 460/480 V |
| Auxiliary Circuit Contact Reliability | 1 faulty switching per 100 million (17 V, 1 mA) |
| Product Approvals | General Product Approval, EMC, Functional Safety/Safety of Machinery |
The Siemens 3RT2518-1BB40 is a robust and versatile contactor engineered to facilitate efficient control of electric motors and loads. This model is part of the SIRIUS product line, renowned for its reliability and performance in a wide range of industrial applications. With a size S00 footprint, it is compact enough for space-conscious installations while delivering the power needed for demanding operations.
This contactor is designed to handle AC-3 loads up to 7.5 kW at 400 V, making it suitable for a variety of medium-power applications. It features a 24 V DC control supply voltage, ensuring compatibility with common industrial control systems. The 3RT2518-1BB40 is equipped with 2 normally open (NO) and 2 normally closed (NC) contacts, providing flexibility in circuit design and allowing for both power and control circuit operations.
The unit boasts a high insulation voltage of 690 V and a surge voltage resistance of 6 kV, ensuring it can withstand the rigours of industrial environments. It also has an IP20 protection class on the front, offering a degree of protection against solid objects and ensuring safe operation.
Installation is straightforward, with options for both screw and snap-on mounting onto a standard 35 mm DIN rail. The contactor's screw-type terminals make wiring secure and maintenance simple. It is designed to operate reliably within an ambient temperature range of -25 to +60°C, and at installation altitudes of up to 2000 metres above sea level, ensuring consistent performance in diverse working conditions.
The Siemens 3RT2518-1BB40 is a testament to Siemens' commitment to quality, offering a dependable solution for controlling electric motors and loads in a variety of industrial settings.
Commonly Asked Questions
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Frequently Asked Questions
What is the size of the contactor?
The contactor is of size S00, which is a compact size suitable for various applications.
Can this contactor be mounted on a DIN rail?
Yes, it can be mounted on a 35 mm standard mounting rail according to DIN EN 50022 with both screw and snap-on mounting options.
What is the rated control supply voltage for this contactor?
The rated control supply voltage for the contactor is 24 V DC.
What are the main technical characteristics of this contactor?
This contactor features 2 normally open (NO) and 2 normally closed (NC) contacts, with an AC3 rating of 7.5 kW and a 4-pole design. It also has screw terminals for secure connections.
What is the IP protection class of the contactor?
The contactor has an IP20 protection class on the front, ensuring finger-safe operation.
Is the contactor equipped with auxiliary switches?
Yes, the contactor comes with an auxiliary switch option.
What is the ambient temperature range for operating this contactor?
The contactor can operate within an ambient temperature range of -25 °C to +60 °C.
What is the insulation voltage rating of this contactor?
The insulation voltage rating of the contactor is 690 V.
How many mechanical operating cycles can the contactor handle?
The contactor is designed for typically 30 million mechanical operating cycles.
What certifications does this contactor have?
The contactor has general product approvals and conforms to standards relevant to functional safety and machinery safety.
Part conditions explained
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