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Specification & Description
| Specification | Description |
|---|---|
| Part Number | 3TH2031-0BB4 |
| Alternative Part Number | 3TH20310BB4 |
| Manufacturer | Siemens |
| Product Type | Contactor Relay |
| Contact Configuration | 3 Normally Open (NO); 1 Normally Closed (NC) |
| Rated Operational Current | 4 A at AC-15, 230 V; 3 A at AC-15, 400 V |
| Control Supply Voltage | 24 V DC |
| Size of Contactor | 0 |
| Ambient Operating Temperature | -25 … +55 °C |
| Protection Class | IP20 |
| Reference Code | K (according to DIN EN 61346-2) |
| Mounting Type | Screw and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 50022 |
| Dimensions (H x W x D) | 48 mm x 45 mm x 68 mm |
| Electrical Connection | Screw-type terminals |
| Protection Against Electric Shock | Finger-safe |
| B10 Value | 400,000 (with 0.3 x Ie) |
| T1 Value for Proof Test Interval or Service Life | 20 years (according to IEC 61508) |
| Commodity Code | 853649 |
The Siemens 3TH2031-0BB4 is a high-quality contactor relay designed to meet the demands of various industrial applications. This component is engineered to facilitate reliable switching of control signals within electrical circuits. It features a configuration of 3 normally open (NO) and 1 normally closed (NC) contacts, making it versatile for integration into numerous control systems.
With a control voltage of 24 V DC, this contactor relay ensures efficient operation and compatibility with a wide range of control voltages commonly used in the industry. The screw terminal design allows for secure and straightforward connections, ensuring a robust installation and maintenance process.
The compact size of the contactor, conforming to EN 50011 standards, allows for efficient use of space within control cabinets, while the IP20 protection class on the front provides a basic level of protection against solid objects. This makes the Siemens 3TH2031-0BB4 suitable for use in controlled environments where direct contact with the device is not a concern.
The operating current ratings at AC-15 are 4 A at 230 V and 3 A at 400 V, which are indicative of the relay's capability to handle moderate current loads, thus ensuring reliable performance in a variety of electrical applications.
This contactor relay is also designed for easy mounting, with options for both screw and snap-on mounting onto a 35 mm standard mounting rail according to DIN EN 50022, which is a common mounting standard in the industry.
The Siemens 3TH2031-0BB4 is a phased-out product, and its successor is the SIRIUS 3RH21 series. However, it remains a reliable choice for those looking to maintain or replace existing installations with a proven and trusted solution.
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Frequently Asked Questions
What type of device is this Siemens contactor relay?
The Siemens contactor relay is an electromechanical switching device designed for controlling power circuits. It features 3 normally open (NO) and 1 normally closed (NC) contacts, suitable for various industrial applications.
Can this contactor relay be used in safety applications?
While the contactor relay is designed to meet high reliability standards, its suitability for safety applications depends on the specific requirements of the system. It is advisable to consult the relevant safety standards and possibly look for devices specifically certified for safety applications.
What is the control supply voltage for this contactor relay?
The control supply voltage for this contactor relay is 24 V DC, which is the rated value for its DC operation.
What is the operating current rating for this contactor relay?
The operating current rating for this contactor relay at AC-15 is 4 A at 230 V and 3 A at 400 V.
What are the mounting options for this contactor relay?
This contactor relay can be mounted using screw and snap-on mounting onto a 35 mm standard mounting rail according to DIN EN 50022.
What is the protection class of this contactor relay?
The protection class of this contactor relay is IP20, which indicates protection against solid objects larger than 12.5 mm but not against water.
What are the dimensions of this contactor relay?
The dimensions of the contactor relay are 45 mm in width, 48 mm in height, and 68 mm in depth.
What type of terminals does this contactor relay have?
This contactor relay is equipped with screw-type terminals for its auxiliary and control current circuits.
Is there a successor model for this contactor relay?
Yes, there is a successor model for the 3TH2031-0BB4 contactor relay. It is part of the SIRIUS 3RH21 series.
How can I ensure the contactor relay is finger-safe?
The design of this contactor relay is finger-safe, meaning it provides protection against accidental electrical shock by preventing direct contact with live parts.
