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Specification & Description
| Specification | Description |
|---|---|
| Part Number | 3TX4422-0A |
| Alternative Part Number | 3TX44220A |
| Manufacturer | Siemens |
| Series | SIRIUS |
| Type | Auxiliary Switch Block |
| Suitable Applications | Contactor relays and power contactors according to EN 50011 |
| Number of Contacts | 4 (2 NO + 2 NC) |
| Rated Insulation Voltage | 690 V |
| Rated Operating Current | 10 A |
| Impulse Voltage Resistance | 6 kV |
| Mechanical Operating Cycles | Typically 10,000,000 |
| Ambient Operating Temperature | -25 … +55 °C |
| Storage Temperature | -55 … +80 °C |
| Protection Class | IP20 |
| Mounting Type | Snap-on mounting |
| Dimensions (W x H x D) | 45 x 24 x 25 mm |
| Electrical Connection | Screw-type terminals |
| Connectable Conductor Cross-sec | 2x (0.5 ... 1.0 mm²), 2x (0.75 ... 2.5 mm²) for auxiliary contacts; 2x (18 ... 12) AWG conductors |
| Product Function | Positively driven operation according to IEC 60947-5-1 |
| Commodity Code | 853650 |
The Siemens 3TX4422-0A is a high-quality auxiliary switch block designed to complement contactor relays in a variety of industrial applications. This component is part of the esteemed SIRIUS series and is engineered to facilitate the reliable operation of machinery and electrical systems. With a robust construction that ensures durability, the 3TX4422-0A features a screw terminal connection system for secure and straightforward installation.
This auxiliary switch block is rated for an insulation voltage of 690 V and can handle an operating current of up to 10 A at AC-12 (24 V and 230 V). It is equipped with 2 normally open (NO) and 2 normally closed (NC) contacts, providing versatility in its application across different control circuits. The product is designed to operate within an ambient temperature range of -25 to +55 °C, ensuring consistent performance even in demanding environments.
With a compact footprint measuring 45 x 25 x 24 mm, the 3TX4422-0A is designed for snap-on mounting, making it easy to integrate into existing setups without the need for extensive modifications. The switch block's mechanical service life is rated at a typical 10 million switching cycles, highlighting its longevity and reliability.
Safety is a key consideration in the design of the 3TX4422-0A, which includes positively driven operation according to IEC 60947-5-1 standards. This feature ensures that the auxiliary contacts will operate in a fail-safe manner, providing an additional layer of protection for both the system and the operator.
The Siemens 3TX4422-0A auxiliary switch block is a testament to the brand's commitment to quality and reliability, making it a valuable component for enhancing the functionality and safety of industrial control systems.
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Frequently Asked Questions
What is the purpose of an auxiliary switch block?
An auxiliary switch block is used to provide additional contact points for a contactor or relay, allowing for the control of auxiliary circuits that can be used for status indication, interlocking, or other control functions.
Can this auxiliary switch block be used with any contactor or relay?
This auxiliary switch block is designed for use with contactor relays according to EN 50011, so it should be compatible with devices that meet this standard.
What are the voltage and current specifications for this auxiliary switch block?
The auxiliary switch block is rated for an insulation voltage of 690 V and has an operating current of 10 A for auxiliary contacts at AC-12, with varying current ratings for different AC and DC applications.
What type of terminals does this auxiliary switch block have?
The auxiliary switch block comes with screw-type terminals, which are designed for secure and reliable wire connections.
What is the IP rating of this auxiliary switch block?
The auxiliary switch block has an IP20 protection class rating on the front, indicating that it is protected against solid objects larger than 12.5 mm but not against water.
What are the dimensions of this auxiliary switch block?
The dimensions of the auxiliary switch block are 45 mm in width, 25 mm in depth, and 24 mm in height.
How many contacts does this auxiliary switch block have?
The auxiliary switch block has 2 normally closed (NC) contacts and 2 normally open (NO) contacts.
What is the mechanical service life of this auxiliary switch block?
The mechanical service life of the auxiliary switch block is typically 10 million operating cycles.
How is this auxiliary switch block mounted?
This auxiliary switch block is designed for snap-on mounting, which allows for easy and quick installation onto the appropriate contactor or relay.
Does this auxiliary switch block have positively driven contacts?
Yes, the auxiliary switch block features positively driven operation according to IEC 60947-5-1, ensuring reliable performance in safety-related applications.
