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Specification & Description
| Specification | Description |
|---|---|
| Part Number | 3TH4394-0BB4 |
| Alternative Part Number | 3TH43940BB4 |
| Manufacturer | Siemens |
| Product Type | Contactor Relay |
| Size of Contactor | 0 |
| Number of Contacts | 5 NO (Normally Open) + 5 NC (Normally Closed) |
| Overlap | 1 Overlap (O'LAP) |
| Terminal Type | Screw Terminal |
| Operating Voltage | DC 24V |
| Ambient Operating Temperature | -25 … +55 °C |
| Protection Class IP on the Front | IP20 |
| Reference Code | K (according to DIN EN 61346-2) |
| Control Circuit Voltage Type | DC |
| Auxiliary Circuit Operating Current | 10 A at 230 V, 6 A at 400 V (AC-15 Rated Value) |
| Identification Number and Letter | 55 E, 1U |
| Mounting Type | Screw and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 50022 |
| Dimensions (Height x Width x Depth) | 78 mm x 55 mm x 135 mm |
| Electrical Connection Type | Screw-type terminals for auxiliary and control circuit |
| B10 Value with High Demand Rate | 1,000,000 (With 0.3 x Ie according to SN 31920) |
| T1 Value for Proof Test Interval | 20 years (according to IEC 61508) |
| Protection Against Electrical Shock | Finger-safe |
The Siemens 3TH4394-0BB4 is a meticulously engineered contactor relay that serves as a critical component in a wide range of industrial control systems. Designed to meet the stringent requirements of EN 50011, this relay features a configuration of 5 normally open (NO) and 5 normally closed (NC) contacts, along with a single overlapping contact, ensuring versatile integration into various circuit designs.
Constructed with a size 0 form factor, the 3TH4394-0BB4 is compact yet robust, making it suitable for space-conscious applications without compromising on performance. The relay operates with a DC control supply voltage rated at 24V, providing reliable switching and control for DC-operated circuits.
The device boasts an ambient operating temperature range of -25 to +55 degrees Celsius, allowing it to function effectively in diverse environmental conditions. With a protection class of IP20 on the front, it offers a degree of protection against solid objects, enhancing its durability in industrial settings.
For ease of installation, the 3TH4394-0BB4 features screw-type terminals for secure electrical connections, as well as screw and snap-on mounting options for a 35mm standard mounting rail in accordance with DIN EN 50022. Its dimensions, with a height of 78mm, width of 55mm, and depth of 135mm, make it a practical choice for integration into control panels and equipment.
The relay's auxiliary circuit is capable of handling operating currents of 10A at 230V and 6A at 400V in AC-15 applications, demonstrating its suitability for controlling a variety of loads. The 3TH4394-0BB4 is also designed with safety in mind, featuring finger-safe protection against electrical shock.
This Siemens contactor relay is a reliable and efficient solution for those seeking a high-quality component for their control systems, offering both functionality and flexibility in a wide array of industrial applications.
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Frequently Asked Questions
What type of device is this Siemens contactor relay?
The Siemens contactor relay is an auxiliary contactor designed for various control applications. It features 5 normally open (NO) and 5 normally closed (NC) contacts, with a screw terminal connection and operates on a 24 V DC control supply voltage.
Can this contactor relay be used in extreme temperatures?
Yes, the contactor relay is designed to operate within an ambient temperature range of -25 to +55 degrees Celsius, making it suitable for use in a variety of environmental conditions.
What is the protection class of the front side of the contactor relay?
The front side of the contactor relay has a protection class of IP20, indicating a basic level of protection against solid objects.
What are the dimensions of this contactor relay?
The contactor relay has a height of 78 mm, a width of 55 mm, and a depth of 135 mm.
How is the contactor relay mounted?
The contactor relay can be mounted using screws and can also be snapped onto a 35 mm standard mounting rail according to DIN EN 50022.
What is the rated operational current for this contactor relay at AC-15?
At AC-15, the contactor relay has a rated operational current of 10 A at 230 V and 6 A at 400 V.
What type of electrical connection does the contactor relay have for its auxiliary and control circuit?
The contactor relay utilises screw-type terminals for its auxiliary and control circuit electrical connections.
What is the B10 value for this contactor relay?
The B10 value for the contactor relay is 1,000,000 with a high demand rate according to SN 31920, assuming 0.3 times the rated operational current (Ie).
What is the T1 value for the proof test interval or service life of the contactor relay?
The T1 value for the proof test interval or service life of the contactor relay is 20 years, in accordance with IEC 61508.
Is the contactor relay finger-safe?
Yes, the design of the contactor relay provides protection against electrical shock, making it finger-safe.
