# Siemens 3KD0542-2LG20-3 4-Pole Switch Disconnector, 100A, 750/690V

**URL:** https://aio.lv/en/product--siemens-3kd0542-2lg20-3--12449789
**Data updated:** 2026-05-18 02:54 (EEST)
**Category:** Power Sockets
**Manufacturer:** Siemens
**Manufacturer code:** 3KD0542-2LG20-3
**EAN:** 4001869586700
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 156.99 €
**Prices and availability valid until:** 2026-08-03 23:59
**Price without VAT (21%):** 129.74 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--siemens-3kd0542-2lg20-3--12449789

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 23.07.2026 | free |
| Pickup points | 28.07.2026 | 1.89 EUR |
| Courier delivery to door | 28.07.2026 | 4.99 EUR |

## Summary description

The Siemens 3KD0542-2LG20-3 is a 4-pole switch disconnector designed for reliable electrical circuit isolation. It features a rated current of 100 A and supports input voltages up to 750/690 V. With a power dissipation of 23 W and an IP10 protection rating, this grey-colored device is suitable for industrial applications requiring secure power disconnection. It complies with IEC 81346-2 Q standards for high-quality electrical performance.

## Long description

The Siemens 3KD0542-2LG20-3 is a robust 4-pole switch disconnector engineered for secure electrical circuit isolation in demanding industrial environments. With a rated current of 100 A and support for voltages up to 750/690 V, this device provides reliable performance for power distribution and control systems. Its compact design and direct front-operating mechanism ensure efficient manual control, while the durable construction meets high-quality electrical standards.
Advantages
This switch disconnector offers exceptional reliability and safety for industrial power management. The 4-pole configuration allows for comprehensive circuit disconnection, ensuring that equipment can be safely serviced or maintained. Its direct operating mechanism provides intuitive and immediate control, while the box terminal design facilitates secure and stable cable connections. The unit is built to withstand continuous operation with a power dissipation of 23 W, ensuring long-term stability in various electrical configurations.
Suitable for
Industrial power distribution panels
Electrical circuit isolation for maintenance
Control cabinet installations
Machine safety disconnection systems
When it may not be suitable
This device is rated with an IP10 protection level, meaning it is not suitable for environments exposed to dust, moisture, or water splashes. It must be installed within a protective enclosure to prevent contact with live parts and environmental damage.
Key specifications
Rated current: 100 A
Voltage rating: 750 / 690 V
Number of poles: 4
Protection rating: IP10
Power dissipation: 23 W
Dimensions: 96 mm x 95 mm x 110 mm
Terminal type: Box terminal
Operating mechanism: Direct front-operated
How to use
The Siemens 3KD0542-2LG20-3 is designed for central mounting within an electrical cabinet. Installation should be performed by qualified personnel in accordance with local electrical regulations. Ensure the device is securely fastened and that all cables are properly terminated in the box terminals to prevent overheating. The front-mounted handle allows for manual switching of the circuit. Always verify that the power is disconnected before performing any wiring or maintenance tasks on the connected equipment.
What to consider before purchase
Verify that the IP10 rating is sufficient for your installation environment.
Ensure the 100 A current rating matches your circuit requirements.
Check the available space in your enclosure against the device dimensions.
Confirm that a 4-pole configuration is required for your specific application.
Usage recommendations: Regularly inspect the terminal connections for tightness and ensure the operating mechanism moves freely to maintain optimal safety and performance standards.

## Specifications

| Feature | Value |
|---|---|
| Storage temperature (T-T) | -25 - 55 |
| Pollution degree | 3 |
| Power dissipation | 23 W |
| Short-time withstand current | 3500 |
| Compliance certificates | UKCA, EAC, CE, CCC |

### Packaging data

| Feature | Value |
|---|---|
| Package depth | 129 mm |
| Package height | 98 mm |
| Package width | 120 mm |

### Design

| Feature | Value |
|---|---|
| Certification | IEC 81346-2 Q |
| Product colour | Grey |
| International Protection (IP) code | IP10 |

### Weight & dimensions

| Feature | Value |
|---|---|
| Weight | 0.475 kg |
| Height | 110 mm |
| Width | 96 mm |
| Depth | 95 mm |

### Power

| Feature | Value |
|---|---|
| Input voltage | 750 / 690 |
| Rated current | 100 A |

### Features

| Feature | Value |
|---|---|
| Operating temperature (T-T) | -5 - 40 |
| Number of poles | 4 |

### Logistics data

| Feature | Value |
|---|---|
| Country of origin | China |

## FAQ

### How much does the Siemens 3KD0542-2LG20-3 Switch Disconnector cost, and is it available for purchase?

The price is 156.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 4 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 23.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay, Installment. All transactions are 100% secure and encrypted.

### Can Siemens 3KD0542-2LG20-3 Switch Disconnector be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. Learn more about installments and credit options: https://aio.lv/en/payment#b3

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All Siemens products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Siemens service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

### How can I tell if this product suits my needs?

When making a choice, we recommend paying attention to the key features: weight, product colour, compatibility with your devices or usage conditions, material quality, functionality, and warranty terms. These characteristics will help you determine how well the model meets your needs.

## Image

https://aio.lv/img/cache/product/12449789/68777742_large.webp