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Specification & Description
| Specification | Description |
|---|---|
| Part Number | 3RH1140-2BB40 |
| Alternative Part Number | 3RH11402BB40 |
| Manufacturer | Siemens |
| Product Type | Contactor Relay |
| Contact Configuration | 4 Normally Open (NO) contacts |
| Rated Operational Current | 10 A |
| Control Supply Voltage | 120 V ac |
| Size of Contactor | S00 |
| Insulation Voltage | Rated at 690 V with degree of pollution 3 |
| Surge Voltage Resistance | Rated value 6 kV |
| Protection Class IP | IP20 on the front |
| Ambient Operating Temperature | -25 ... +60 °C |
| Ambient Storage Temperature | -55 ... +80 °C |
| Mechanical Service Life | Typical 30,000,000 switching cycles |
| Mounting Type | Screw and snap-on mounting |
| Connection Type | Cage Clamp terminals |
| Conductor Cross-section | Solid: 2x (0.25 ... 2.5 mm²), Finely stranded with/without core end processing: 2x (0.25 ... 1.5 mm²) |
| Installation Altitude | Maximum 2,000 m above sea level |
| Shock Resistance | 10g / 5 ms and 5g / 10 ms |
| Commodity Code | 85364900 |
The Siemens 3RH1140-2BB40 is a high-quality contactor relay designed for a wide range of industrial applications. This robust component features four normally open (NO) contacts, making it an ideal choice for users looking to control multiple circuits with a single device. With a rated operational current of 10 A and an operating voltage of 120 V ac, it is well-suited for moderate power applications.
Crafted for reliability, the 3RH1140-2BB40 boasts an impressive mechanical service life, capable of up to 30 million switching cycles, ensuring long-term performance and minimal maintenance. The contactor relay is housed in a compact size S00 enclosure, which allows for efficient use of space within control cabinets.
The device is equipped with cage clamp terminals, offering a secure and maintenance-free electrical connection that is both time-saving and convenient during installation. The contactor relay operates within a control supply voltage range of 0.8 to 1.1 times the rated value, providing stable performance even under fluctuating power conditions.
Designed with a focus on operational efficiency, the Siemens 3RH1140-2BB40 contactor relay is a dependable choice for those seeking a durable and consistent solution for their electrical control needs. Its straightforward design and ease of integration make it a valuable addition to any industrial control system.
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Frequently Asked Questions
What type of device is this and what are its main uses?
This device is a contactor relay designed for controlling electric circuits. Its main uses include switching a power circuit, interfacing with control logic, and ensuring safe operation in industrial control systems.
Can you describe the contact configuration of this contactor relay?
The contactor relay has a 4NO (four normally open) contact configuration, which means it has four contacts that are open when the relay is not energised and close to complete a circuit when the relay is energised.
What is the rated control supply voltage for this contactor relay?
The rated control supply voltage for this contactor relay is 24 V DC, which is the voltage required to operate the relay coil.
What is the maximum operating current for this contactor relay at AC-12?
The maximum operating current for this contactor relay at AC-12 is 10 A.
What are the ambient temperature limits for operating this contactor relay?
The ambient temperature limits for operating this contactor relay are between -25°C and +60°C.
What is the mechanical service life of this contactor relay?
The mechanical service life of the 3RH1140-2BB40 contactor relay is typically 30 million switching cycles.
What type of terminals does this contactor relay have for electrical connections?
This contactor relay is equipped with Cage Clamp terminals for making secure and maintenance-free electrical connections.
What is the insulation voltage rating for this contactor relay?
The insulation voltage rating for this contactor relay, with a degree of pollution 3, is rated at 690 V.
What is the protection class IP rating for the front of this contactor relay?
The protection class IP rating for the front of this contactor relay is IP20, indicating protection against solid objects larger than 12.5 mm but not against liquids.
What is the significance of the B10 value mentioned in the datasheet?
The B10 value indicates the number of operating cycles until 10% of the devices are expected to fail due to contact wear. It is a reliability indicator used in the context of functional safety.
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