# KOS Line 100403 Hermetic Light Switch, IP44, White

**URL:** https://aio.lv/en/product--kos-100403--12461983
**Data updated:** 2026-05-18 09:32 (EEST)
**Category:** Smart Switches
**Manufacturer:** KOS
**Manufacturer code:** 100403
**EAN:** 5903292352985
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 7.99 €
**Prices and availability valid until:** 2026-07-13 23:59
**Price without VAT (21%):** 6.60 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--kos-100403--12461983

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 06.07.2026 | free |
| Pickup points | 09.07.2026 | 1.99 EUR |
| Courier delivery to door | 09.07.2026 | 4.99 EUR |

## Summary description

The KOS Line 100403 is a hermetic light switch designed for reliable operation in demanding environments. Featuring an IP44 ingress protection rating, this white switch is resistant to moisture and dust, making it suitable for bathrooms, garages, or outdoor areas. It provides a durable and functional solution for controlling lighting circuits while maintaining a clean, minimalist aesthetic.

## Long description

The KOS Line 100403 hermetic light switch is a robust electrical component engineered for reliable performance in environments where moisture and dust exposure are concerns. With its IP44 ingress protection rating, this switch ensures that internal mechanisms remain shielded from water splashes and solid particles, providing a safe and durable solution for lighting control. Its clean, white finish and minimalist design allow it to integrate seamlessly into various interior and exterior settings, maintaining a professional appearance while delivering consistent functionality.
Advantages
The primary benefit of this hermetic switch is its enhanced durability in challenging conditions. The IP44 rating provides peace of mind in areas prone to humidity, ensuring the longevity of the electrical connection. Furthermore, the high-quality materials used in the construction of the KOS Line 100403 offer resistance to wear and tear, making it a dependable choice for long-term use. The ergonomic design ensures smooth operation, while the neutral white color complements a wide range of architectural styles and wall finishes.
Suitable for
Bathrooms and laundry rooms
Garages and workshops
Covered outdoor areas and patios
Basements and utility rooms
When it may not be suitable
This switch is not designed for direct exposure to heavy rain or high-pressure water jets, as it is rated for splash protection only. It should not be installed in industrial environments where it may be exposed to corrosive chemicals or extreme temperatures that exceed standard residential or commercial operating limits.
Key specifications
Ingress protection rating: IP44
Color: White
Design: Hermetic/Splash-proof
Application: Lighting control
How to use
Installation should be performed by a qualified electrician to ensure all safety standards are met. The switch is designed for surface or flush mounting depending on the specific wall configuration. Once installed, the switch operates via a standard manual toggle mechanism to open or close the lighting circuit. Ensure that the power supply is disconnected at the main circuit breaker before beginning any installation or maintenance work.
What to consider before purchase
Verify the IP44 rating meets the specific moisture requirements of your installation area.
Check the compatibility of the switch with your existing electrical wiring and wall box.
Ensure the white finish matches your current interior design scheme.
Usage recommendations
For optimal safety and performance, always ensure the protective gasket is correctly seated during installation to maintain the hermetic seal. Avoid using abrasive cleaners on the surface to prevent scratching the finish.

## FAQ

### How much does the KOS Line 100403 Hermetic Light Switch cost, and is it available for purchase?

The price is 7.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 16 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 06.07.2026 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 KOS 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 KOS 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/12461983/68763859_large.webp