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Specification & Description
| Specification | Description |
|---|---|
| Part Number | 3TX4440-2A |
| Alternative Part Number | 3TX44402A |
| Manufacturer | Siemens |
| Product Type | Auxiliary Switch Block |
| Number of Contacts | 4 Normally Open (NO) |
| Rated Operational Voltage | 230 V ac |
| Rated Operational Current | 10 A |
| Insulation Voltage | 690 V |
| Impulse Voltage Resistance | 6 kV |
| Mechanical Operating Cycles | Typically 10,000,000 |
| Ambient Operating Temperature Range | -25 … +55 °C |
| Storage Temperature Range | -55 … +80 °C |
| Protection Class | IP20 |
| Mounting Type | Snap-on mounting |
| Width | 12 mm |
| Height | 70 mm |
| Depth | 51.5 mm |
| Connection Type | Screw-type terminals |
| Conductor Cross-section Range | 2x (0.5 ... 1.0 mm²), 2x (0.75 ... 2.5 mm²) for finely stranded with conductor end processing |
| AWG Conductor Range | 2x (18 ... 12) for auxiliary contacts |
| Compliance | Positively driven operation to IEC 60947-5-1 |
| Commodity Code | 85365080 |
The Siemens 3TX4440-2A is a high-quality auxiliary switch block designed to complement contactor relays and power contactors in a variety of industrial applications. This component is engineered to facilitate reliable switching operations within electrical circuits, ensuring seamless control and management of connected devices.
Crafted with precision, the 3TX4440-2A features four normally open (NO) contacts, capable of handling an operating current of up to 10 A at 230 V ac. Its robust construction allows it to withstand mechanical operating cycles typically up to 10 million, highlighting its durability and long service life.
The switch block is equipped with screw terminals, providing a secure and stable connection for auxiliary and control current circuits. It is designed for snap-on mounting, which simplifies installation and maintenance processes. With a compact width of 12 mm, height of 70 mm, and depth of 51.5 mm, it integrates seamlessly into electrical systems without requiring excessive space.
Safety is a paramount consideration in the design of the 3TX4440-2A, which includes features such as positively driven operation compliant with IEC 60947-5-1 standards. This ensures that the switch block operates reliably within the safety parameters of industrial control systems.
The Siemens 3TX4440-2A auxiliary switch block is a testament to the brand's commitment to quality, reliability, and performance in industrial control products. It is an essential component for professionals seeking to enhance the functionality and efficiency of their electrical control systems.
Commonly Asked Questions
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Frequently Asked Questions
What is the voltage rating for this auxiliary switch block?
The auxiliary switch block is rated for an insulation voltage of 690 V and can operate with a control voltage of 230 V ac.
How many mechanical operating cycles can this auxiliary switch block withstand?
This auxiliary switch block is designed to withstand typically 10 million mechanical operating cycles.
What is the ambient temperature range for operating this auxiliary switch block?
The auxiliary switch block can operate within an ambient temperature range of -25 °C to +55 °C.
Can this auxiliary switch block be used with DC circuits?
Yes, the 3TX4440-2A can be used with DC circuits and has different operating currents depending on the voltage, ranging from 10 A at 24 V to 0.48 A at 220 V.
What type of terminals does this auxiliary switch block have for connection?
The auxiliary switch block is equipped with screw-type terminals for secure and reliable connections.
Is the auxiliary switch block equipped with any NC contacts?
No, the auxiliary switch block does not have any normally closed (NC) contacts; it comes with 4 normally open (NO) contacts.
What is the width of the auxiliary switch block for mounting purposes?
The width of the auxiliary switch block is 12 mm, making it compact and suitable for various mounting configurations.
Does this auxiliary switch block have a protection class rating?
Yes, the front of the auxiliary switch block has a protection class rating of IP20.
What is the function of a positively driven operation in this auxiliary switch block?
A positively driven operation ensures that the contacts within the auxiliary switch block follow each other in such a way that they cannot be in conflicting states, enhancing safety and reliability in control circuits.
How can I mount this auxiliary switch block?
The auxiliary switch block is designed for snap-on mounting, which allows for quick and easy installation onto compatible devices.
