# Ensto KS 3.40 3-Pole 40A Isolator Switch with Blue Handle

**URL:** https://aio.lv/en/product--ensto-ks340--11398377
**Data updated:** 2026-05-18 02:51 (EEST)
**Category:** Power Sockets
**Manufacturer:** ENSTO
**Manufacturer code:** KS3.40
**EAN:** 6418677170010
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 46.49 €
**Prices and availability valid until:** 2026-07-19 23:59
**Price without VAT (21%):** 38.42 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--ensto-ks340--11398377

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 14.07.2026 | free |
| Pickup points | 17.07.2026 | 1.99 EUR |
| Courier delivery to door | 17.07.2026 | 4.99 EUR |

## Summary description

The Ensto KS 3.40 is a reliable 3-pole isolator switch rated for 40A, designed for safe electrical circuit disconnection. Featuring a distinctive blue handle for easy identification, this switch is suitable for industrial and commercial electrical installations. It ensures secure isolation of power supply, providing durability and high performance for demanding electrical systems.

## Long description

The Ensto KS 3.40 is a robust 3-pole isolator switch engineered for the secure disconnection of electrical circuits in industrial and commercial environments. Rated for 40A, this device provides a reliable means to isolate power supplies during maintenance or emergency situations. Its design incorporates a highly visible blue handle, which allows for quick identification and operation, ensuring that safety protocols are easily followed in complex electrical systems.
Advantages
This isolator switch stands out due to its high-quality construction and focus on operational safety. The 3-pole configuration allows for the simultaneous disconnection of three phases, providing comprehensive isolation for various electrical loads. Its durable housing is built to withstand the rigors of demanding environments, ensuring long-term performance and reliability. The intuitive blue handle design minimizes the risk of human error, making it a dependable component for professional electrical installations.
Suitable for
Industrial machinery power control
Commercial building electrical distribution systems
Maintenance and repair isolation tasks
Emergency power cutoff applications
When it may not be suitable
This switch is not designed for applications requiring a higher current rating than 40A or for circuits with more than three poles. It is also not intended for use in environments where specific ingress protection ratings beyond standard industrial requirements are necessary, or in hazardous areas requiring explosion-proof equipment.
Key specifications
Number of poles: 3
Rated current: 40A
Handle color: Blue
Application: Industrial and commercial electrical systems
How to use
The Ensto KS 3.40 should be installed by a qualified electrician in accordance with local electrical codes. It is typically mounted within an electrical enclosure or panel. To isolate the circuit, rotate the blue handle to the designated off position. Ensure that the switch is fully engaged to guarantee complete disconnection before performing any maintenance on the downstream equipment. Always verify the absence of voltage using a calibrated testing device before touching any electrical components.
What to consider before purchase
Verify that the 40A rating is sufficient for your specific load requirements.
Ensure the 3-pole configuration matches your circuit architecture.
Check the mounting dimensions to ensure compatibility with your existing electrical panel or enclosure.
Usage recommendations
Regularly inspect the switch for any signs of physical damage or loose connections to maintain optimal safety and performance. Ensure the handle operates smoothly and that the switching mechanism is free from debris.

## FAQ

### How much does the Ensto KS 3.40 3-Pole 40A Isolator Switch cost, and is it available for purchase?

The price is 46.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 7 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 14.07.2026 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. All transactions are 100% secure and encrypted.

### 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 ENSTO 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 ENSTO 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

## Image

https://aio.lv/img/cache/product/11398377/66046838_large.webp