3TX4431-2A

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The Siemens 3TX4431-2A is a high-quality auxiliary switch block designed for seamless integration with contactor relays and motor contactors. This component is engineered to meet the stringent requirements of EN 50005, ensuring reliable performance in a variety of industrial applications. With an insulation voltage rated at 690 V and an impulse voltage resistance of 6 kV, it offers robust protection for your electrical circuits.

Featuring a snap-on mounting design, the 3TX4431-2A allows for quick and easy installation, saving valuable time during setup or maintenance. The switch block is compact, with dimensions of 45 x 25 x 24 mm, making it suitable for use in space-constrained environments. It is equipped with screw-type terminals, providing a secure and reliable connection for auxiliary and control current circuits.

The 3TX4431-2A boasts an impressive mechanical operating cycle of 10 million, highlighting its durability and long service life. It includes 3 normally open (NO) contacts and 1 normally closed (NC) contact for instantaneous switching, catering to a wide range of control and signalling functions.

This auxiliary switch block operates efficiently across a broad ambient temperature range, from -25°C to +55°C during operation and -55°C to +80°C during storage, ensuring consistent performance under varying environmental conditions. With an IP20 protection class rating on the front, it is safeguarded against solid objects larger than 12.5 mm, adding an extra layer of durability.

The 3TX4431-2A is a testament to Siemens' commitment to quality and reliability, making it an essential component for industrial control systems requiring precise and dependable auxiliary switching capabilities.
Specification Description
Part Number 3TX4431-2A
Alternative Part Number 3TX44312A
Manufacturer Siemens
Product Type Auxiliary Switch Block
Insulation Voltage 690 V
Mounting Type Snap-On Mount
Contact Configuration 3NO (Normally Open) / 1NC (Normally Closed)
Protection Class IP20
Terminal Type Screw
Mechanical Operating Cycles 10,000,000 cycles
Rated Operating Current 10 A
Dimensions 45 x 25 x 24 mm
Ambient Operating Temperature Range -25 … +55 °C
Storage Temperature Range -55 … +80 °C
Insulation Voltage with Pollution 3 Rated value 690 V
Impulse Voltage Resistance Rated value 6 kV
Operating Current at AC-12 10 A at 24 V / 230 V, Maximum 10 A
Operating Current at AC-14 10 A at 125 V
Operating Current at AC-15 10 A at 24 V, 5.6 A at 230 V, 3.6 A at 400 V, 2.3 A at 690 V
Operating Current at DC-13 10 A at 24 V, 5 A at 60 V, 1.14 A at 110 V, 0.48 A at 220 V
Mounting Dimensions Width 12 mm, Height 70 mm, Depth 51.5 mm
Electrical Connection Screw-type terminals for auxiliary and control current circuit
Connectable Conductor Cross-section 2x (0.5 ... 1.0 mm²), 2x (0.75 ... 2.5 mm²) for auxiliary contacts, 2x (18 ... 12) AWG
Positively Driven Operation Compliant with IEC 60947-5-1
Commodity Code 853650

What is the insulation voltage rating for this auxiliary switch block?

The insulation voltage rating for the Siemens 3TX4431-2A auxiliary switch block is 690 V, with a degree of pollution 3.

Can this auxiliary switch block be used with motor contactors?

Yes, the auxiliary switch block is designed for use with contactor relays and motor contactors according to EN 50005.

What is the IP protection class of this auxiliary switch block?

The IP protection class for this auxiliary switch block is IP20, which provides protection against solid objects larger than 12mm but not against water.

What are the operating and storage temperature ranges for this part?

The operating temperature range is from -25°C to +55°C, and the storage temperature range is from -55°C to +80°C.

How many mechanical operating cycles can this auxiliary switch block withstand?

The auxiliary switch block is rated for typically 10,000,000 mechanical operating cycles.

What is the impulse voltage resistance of this part?

The impulse voltage resistance of the auxiliary switch block is rated at 6 kV.

What are the dimensions of the auxiliary switch block?

The dimensions of the auxiliary switch block are 45 mm in width, 25 mm in height, and 24 mm in depth.

What type of mounting does this auxiliary switch block support?

The auxiliary switch block supports snap-on mounting for easy installation.

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.

How many normally open (NO) and normally closed (NC) contacts does this auxiliary switch block have?

The auxiliary switch block has 3 normally open (NO) contacts and 1 normally closed (NC) contact.

  • Integration into motor control circuits for additional switching capabilities
  • Expansion of contactor relay functions in industrial automation systems
  • Use in control panels to provide auxiliary contact feedback signals
  • Implementation in HVAC systems for enhanced control and monitoring
  • Application in conveyor systems for start/stop operations
  • Inclusion in pump control circuits for additional safety interlocks
  • Utilisation in manufacturing equipment for process automation
  • Installation in lighting control systems for complex switching arrangements
  • Employment in packaging machinery for sequential control tasks
  • Incorporation in material handling systems for operational enhancements

This content has been produced using multiple sources. EU Automation takes no responsibility for the accuracy of this information. Always consult the original equipment manufacturer for the most up to date instructions and information.

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