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Specification & Description
| Specification | Description |
|---|---|
| Part Number | 3RH2131-2KB40 |
| Alternative Part Number | 3RH21312KB40 |
| Manufacturer | Siemens |
| Contact Configuration | 3 Normally Open (NO) + 1 Normally Closed (NC) |
| Control Supply Voltage | 24 V DC |
| Operating Voltage Range | 0.7 ... 1.25 times the rated control supply voltage (US) with integrated suppressor diode |
| Ambient Operating Temperature | -25°C to +60°C |
| No-load Switching Frequency | 10,000 operations per hour at AC/DC |
| Holding Power of Magnet Coil | 2.8 W at DC |
| Closing Delay | 30 ... 100 ms at DC |
| Opening Delay | 7 ... 13 ms at DC |
| Arcing Time | 10 ... 15 ms |
| Operating Current at AC-12 | Maximum 10 A |
| Operating Current at AC-15 | 10 A at 230 V, 3 A at 400 V, 2 A at 500 V, 1 A at 690 V |
| Operating Current at DC-12 | Refer to datasheet for specific values |
| Safety Related Data | B10 value of 1,000,000 with high demand rate according to SN 31920 |
| Product Function | Positively driven operation according to IEC 60947-5-1 |
| Approvals | General Product Approval, EMC, KC, Functional Safety/Safety of Machinery, various certificates |
| Environmental Confirmations | UL/CSA ratings: A600/Q600 for auxiliary contacts according to UL |
| Commodity Code | 853649 |
The Siemens 3RH2131-2KB40 is a coupling contactor relay designed to facilitate the switching of auxiliary circuits in a variety of industrial applications. This compact and reliable component is part of the SIRIUS product family and is characterised by its size S00, making it suitable for integration into space-constrained environments.
Crafted with precision, the 3RH2131-2KB40 features three normally open (NO) and one normally closed (NC) contact, operating with a control supply voltage of 24 V DC within a range of 0.7 to 1.25 times the rated voltage. This flexibility ensures compatibility with a wide range of control voltages for diverse industrial requirements.
The unit comes equipped with an integrated suppressor diode, which serves to protect the control circuit from voltage spikes, enhancing the overall reliability and longevity of the relay. Additionally, the spring-type terminal design is optimised for PLC outputs, ensuring a secure and maintenance-friendly connection.
With an insulation voltage rated at 690V and a surge voltage resistance of 6kV, the 3RH2131-2KB40 is built to withstand challenging electrical environments. It also boasts a mechanical service life of up to 30 million switching cycles, testifying to its durability and robustness.
The relay operates efficiently within a broad ambient temperature range, making it suitable for use in various climatic conditions. Its finger-safe construction and IP20 protection class on the front provide a degree of protection against direct contact and solid objects, further enhancing its operational safety.
The Siemens 3RH2131-2KB40 is a testament to high-quality engineering, offering reliable performance for the switching of auxiliary circuits in industrial control systems. Its design and features make it a versatile choice for professionals seeking a dependable solution for their automation needs.
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Frequently Asked Questions
What is the voltage rating for this coupling contactor relay?
The coupling contactor relay is rated for a control supply voltage of 24 V DC, with an operating range of 0.7 to 1.25 times the rated voltage.
Can you explain the contact configuration of this relay?
Certainly, this relay features a contact configuration of 3 normally open (NO) contacts and 1 normally closed (NC) contact.
Is there any built-in protection for the relay's coil?
Yes, the relay includes an integrated suppressor diode to protect the coil from voltage spikes.
What type of terminals does this relay have for connection?
This relay is equipped with spring-type terminals, which are suitable for quick and secure connections, including PLC outputs.
What is the size classification of this relay?
The relay falls under the size S00 classification, making it compact and suitable for various applications.
How does this relay perform in terms of mechanical service life?
The relay has a mechanical service life of typically 30 million switching cycles, indicating a high level of durability for long-term use.
What is the insulation voltage rating for this device?
The insulation voltage rating for this device, with a degree of pollution 3, is rated at 690 V.
What is the protection class for the front of the relay?
The front of the relay has a protection class of IP20, providing a basic level of protection against solid objects.
Is this relay suitable for use with positively driven operations?
Yes, the relay supports positively driven operation according to IEC 60947-5-1 standards.
What is the surge voltage resistance of this relay?
The surge voltage resistance of this relay is rated at 6 kV.
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