The Siemens 3LA0205-4YA is a 2-pole heavy-duty switch from the Siemens 3LA0 series, designed for manual switching and control applications in industrial electrical installations. The current Siemens price-list data specifies 25 A rated current for AC-22A and 16 A for AC-23A.
The device is an open-execution switch, making it suitable for integration into electrical control arrangements where a robust manual switching solution is required. Current product listings also identify it as a 2-pole Siemens 3LA0 heavy-duty switch.
The Siemens 3LA0205-4YA can be considered for:
The Siemens 3LA0205-4YA provides a compact and robust manual switching solution for industrial electrical applications. Its 2-pole configuration allows it to be incorporated into suitable switching arrangements where the specified AC-22A and AC-23A ratings meet the application requirements.
The current Siemens pricing documentation lists the model under 3LA0 Heavy Duty Switches, confirming that it belongs to the heavy-duty switching range rather than the auxiliary-contact accessory category.
Its open-execution construction can be useful for panel builders and OEMs designing electrical control and switching systems. Before installation, the application should be checked against the switch's rated current, utilization category, voltage and mounting requirements.
Your supplied title is:
“Accessories for Superswitch, Auxiliary switch (1NO+1NC) - 3LA0205-4YA”
However, multiple catalogue sources identify 3LA0205-4YA as a 2-pole 3LA0 Heavy Duty Switch. The current Siemens-related price list specifies 25 A AC-22A / 16 A AC-23A, while product listings describe it as a 2-pole heavy-duty switch.
Therefore, do not publish this SKU as “Auxiliary switch (1NO+1NC)” unless your original Siemens source specifically confirms that description. The MLFB and product description appear to be mismatched.
1. What is Siemens 3LA0205-4YA?
It is a Siemens 3LA0 2-pole Heavy Duty Switch for manual switching applications.
2. Is 3LA0205-4YA an auxiliary switch?
Based on the available catalogue data, no. It is listed as a 2-pole heavy-duty switch, not a standalone 1NO+1NC auxiliary contact.
3. What is the AC-22A rating?
The current Siemens-related price list specifies 25 A AC-22A.
4. What is the AC-23A rating?
The specified AC-23A rating is 16 A.
5. How many poles does it have?
The 3LA0205-4YA is a 2-pole switch.
| Specification | Details |
|---|---|
| Product Name | Heavy Duty Switch |
| Part Number | 3LA0205-4YA |
| SKU | 3LA0205-4YA |
| Brand | Siemens |
| Product Series | Superswitch 3LA0 |
| Product Type | Heavy Duty Switch |
| Execution Type | Open Execution |
| Number of Poles | 2 Pole |
| Rated Current AC-22A | 25 A |
| Rated Current AC-23A | 16 A |
| Rated Voltage | Up to 500V AC |
| Frequency | 50 Hz |
| Application Category | Heavy Duty Switching |
| Switching Operations | Up to 200 Cycles/Hour |
| Mechanical Life | Approx. 5 Million Operations |
| Terminal Type | Screw Terminals |
| Mounting Type | Panel Mounted |
| Accessory Compatibility | Protective Cover, Locking Disc, Door Interlock |
| Application | Distribution & Feeder Control |
| Country of Origin | India |
| Manufacturer | Siemens Limited |
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