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Specification & Description
| Specification | Description |
|---|---|
| Part Number | 3TX4404-0A |
| Alternative Part Number | 3TX44040A |
| Manufacturer | Siemens |
| Voltage Rating | 690 V (Insulation) |
| Mounting Type | Snap-On Mount |
| Contact Configuration | 4NC (4 Normally Closed contacts) |
| Protection Rating | IP20 |
| Terminal Type | Screw |
| Mechanical Operating Cycles | 10,000,000 cycles |
| Current Rating | 10 A |
| Dimensions | 45 x 25 x 24 mm |
| Suitable For | Contactor relays EN 50011, Ident. no. 44E |
| Ambient Operating Temperature | -25 … +55 °C during operation, -55 … +80 °C during storage |
| Insulation Voltage | Rated at 690 V with degree of pollution 3 |
| Impulse Voltage Resistance | Rated at 6 kV |
| Auxiliary Circuit | 4 NC contacts for instantaneous switching |
| Operating Current of Contacts | 10 A at 24 V, 10 A at 230 V, 5.6 A at 400 V, 2.3 A at 690 V (AC-15 rating) |
| DC Operating Current | 4 A at 24 V, 1.1 A at 110 V, 0.5 A at 220 V (DC-12 rating) |
| Mounting Dimensions | Width: 45 mm, Height: 24 mm, Depth: 25 mm |
| Electrical Connection | Screw-type terminals suitable for finely stranded and AWG conductors |
| Product Function | Positively driven operation according to IEC 60947-5-1 |
| Commodity Code | 853650 |
The Siemens 3TX4404-0A is a high-quality auxiliary switch block designed to enhance the functionality of contactor relays. This component is engineered to comply with EN 50011 standards and carries the identification number 44E. It features four normally closed (NC) contacts, ensuring reliable and secure switching operations within your electrical circuits.
Constructed for durability, the 3TX4404-0A boasts an impressive mechanical service life of up to 10 million operating cycles, making it a robust choice for sustained use in industrial environments. The switch block operates with an insulation voltage rated at 690 V, with a surge voltage resistance of 6 kV, providing a high level of protection against electrical disturbances.
The unit is designed with user safety in mind, offering an IP20 protection class on the front, which safeguards against the ingress of solid objects. It is also capable of withstanding a wide range of ambient temperatures, from as low as -55°C during storage to +55°C during operation, ensuring consistent performance under varying conditions.
Installation is made straightforward with its snap-on mounting design, and the switch block's dimensions are compact, measuring 45 mm in width, 24 mm in height, and 25 mm in depth. This allows for easy integration into existing setups without the need for extensive modifications.
For electrical connections, the 3TX4404-0A utilises screw-type terminals, which are compatible with a range of conductor cross-sections, providing flexibility and convenience during installation. The switch block is also designed with positively driven operation according to IEC 60947-5-1, ensuring reliable separation of contacts for safety.
The Siemens 3TX4404-0A auxiliary switch block is an essential component for those seeking to enhance the control and safety of their contactor relay applications in commercial and industrial settings.
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Frequently Asked Questions
What is the insulation voltage rating for this auxiliary switch block?
The insulation voltage rating for the auxiliary switch block is 690 V, with a degree of pollution 3.
Can you describe the mounting type for this component?
The component features a snap-on mounting type, which allows for easy and secure installation onto compatible devices.
What is the IP protection class of this auxiliary switch block?
This auxiliary switch block has an IP protection class of IP20, indicating protection against solid objects larger than 12.5 mm but not against liquids.
What are the dimensions of this auxiliary switch block?
The dimensions of the auxiliary switch block are 45 mm in width, 24 mm in height, and 25 mm in depth.
How many mechanical operating cycles can this auxiliary switch block withstand?
This auxiliary switch block is designed to withstand up to 10 million mechanical operating cycles.
What type of terminals does this auxiliary switch block have?
The auxiliary switch block is equipped with screw-type terminals for secure and reliable electrical connections.
What is the ambient temperature range for operating this auxiliary switch block?
The ambient temperature range for operating the auxiliary switch block is between -25 °C and +55 °C.
How many normally closed (NC) contacts does this auxiliary switch block have?
The auxiliary switch block has 4 normally closed (NC) contacts.
What is the maximum operating current for the auxiliary contacts at AC-12?
The maximum operating current for the auxiliary contacts at AC-12 is 10 A.
Does this auxiliary switch block have positively driven operation according to IEC 60947-5-1?
Yes, the auxiliary switch block has a product function of positively driven operation in accordance with IEC 60947-5-1.
