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3TX4420-2A
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Specification & Description
| Specification | Description |
|---|---|
| Part Number | 3TX4420-2A |
| Alternative Part Number | 3TX44202A |
| Manufacturer | Siemens |
| Product Type | Auxiliary Contact Block |
| Suitable Applications | Contactor Relays and Motor Contactors |
| Identification Number | EN 50005 Ident. no. 20 |
| Number of Contacts | 2 Normally Open (NO) |
| Protection Class IP | IP20 |
| Ambient Temperature Range (Storage) | -55°C to +80°C |
| Ambient Temperature Range (Operating) | -25°C to +55°C |
| Mechanical Operating Cycles | Typically 10,000,000 |
| Insulation Voltage | Rated at 690V with degree of pollution 3 |
| Impulse Voltage Resistance | Rated at 6kV |
| Operating Current at AC-12 | 10A at 24V and 230V |
| Operating Current at AC-15 | 10A at 24V, 5.6A at 230V, 3.6A at 400V, 2.3A at 690V |
| Operating Current at DC-12 | 4A at 24V, 1.1A at 110V, 0.5A at 220V |
| Operating Current at DC-13 | 10A at 24V, 5A at 60V, 1.14A at 110V, 0.48A at 220V |
| Mounting Type | Snap-on Mounting |
| Dimensions (Width x Height x Depth) | 45mm x 24mm x 25mm |
| Electrical Connection Type | Screw-type Terminals |
| Connectable Conductor Cross-sections | 2x (0.5 ... 1.0 mm²), 2x (0.75 ... 2.5 mm²) for finely stranded wires with core end processing |
| AWG Conductors | 2x (18 ... 12) for auxiliary contacts |
| Positively Driven Operation | Compliant with IEC 60947-5-1 |
The Siemens 3TX4420-2A is a high-quality auxiliary contact block designed for seamless integration with contactor relays and motor contactors. This component is engineered to meet the stringent standards set by EN 50005, featuring an identification number 20 and equipped with 2 normally open (NO) contacts.
Crafted for durability and reliability, the 3TX4420-2A boasts an impressive mechanical operating life of approximately 10 million cycles, ensuring long-term performance in a variety of industrial settings. The auxiliary contact block operates within an ambient temperature range of -25°C to +55°C, making it suitable for use in diverse environmental conditions.
With an insulation voltage rated at 690V and an impulse voltage resistance of 6kV, this auxiliary contact block is built to maintain integrity and safety under high-voltage conditions. The screw-type terminals provide a secure and reliable electrical connection for auxiliary and control current circuits, accommodating a range of conductor cross-sections for flexible installation options.
The 3TX4420-2A is designed with a snap-on mounting type, which allows for quick and easy installation onto existing systems, reducing downtime and simplifying maintenance procedures. Its compact dimensions, with a width of 45mm, height of 24mm, and depth of 25mm, ensure that it can be integrated into space-constrained environments without compromising on functionality.
This auxiliary contact block is also compliant with positively driven operation according to IEC 60947-5-1, reinforcing its status as a safe and dependable choice for enhancing the control capabilities of your electrical systems. Whether used in manufacturing, automation, or other industrial applications, the Siemens 3TX4420-2A auxiliary contact block is a versatile and essential component for modern electrical installations.
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Frequently Asked Questions
What is the purpose of this auxiliary contact block?
The auxiliary contact block is designed for use with contactor relays and motor contactors to provide additional switching operations. It is typically used in control circuits for various signalling and interlocking purposes.
Can this auxiliary contact block be used with any contactor relay or motor contactor?
It is specifically designed to be compatible with contactor relays and motor contactors that conform to EN 50005 standards, with an identification number 20.
What are the environmental operating conditions for this auxiliary contact block?
The auxiliary contact block can operate within an ambient temperature range of -25 to +55 degrees Celsius during operation, and it can be stored in temperatures ranging from -55 to +80 degrees Celsius.
What is the insulation voltage rating for this auxiliary contact block?
The insulation voltage rating for the auxiliary contact block is 690V, with a degree of pollution 3.
How many mechanical operating cycles can this auxiliary contact block withstand?
The auxiliary contact block has a mechanical operating life of typically 10 million cycles, which indicates its durability and reliability in repetitive use.
What type of terminals does this auxiliary contact block have for connection?
This auxiliary contact block is equipped with screw-type terminals for secure and reliable connections in the auxiliary and control current circuits.
What is the IP protection class of this auxiliary contact block?
The auxiliary contact block has an IP20 protection class rating on the front, indicating protection against solid objects larger than 12mm but not against liquids.
What are the dimensions of this auxiliary contact block?
The dimensions for mounting are a width of 45mm, a height of 24mm, and a depth of 25mm, making it compact and suitable for various installation environments.
Does this auxiliary contact block have positively driven operation?
Yes, the auxiliary contact block is designed with a positively driven operation according to IEC 60947-5-1, ensuring reliable performance in safety-related applications.
What is the maximum operating current for the NO contacts at AC-12?
The maximum operating current for the normally open (NO) contacts at AC-12 is 10A, which is suitable for a variety of control circuit applications.
