# Siemens 5TT5840-0 Modular Contactor 40A 4NO 230V AC

**URL:** https://aio.lv/en/product--siemens-5tt58400--1803824
**Data updated:** 2026-05-18 02:44 (EEST)
**Category:** Power Sockets
**Manufacturer:** Siemens
**Manufacturer code:** 5TT58400
**EAN:** 4001869344065
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 195.99 €
**Prices and availability valid until:** 2026-07-17 23:59
**Price without VAT (21%):** 161.98 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--siemens-5tt58400--1803824

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 09.07.2026 | free |
| Courier delivery to door | 14.07.2026 | 53.99 EUR |

## Summary description

The Siemens 5TT5840-0 is a high-quality modular contactor designed for reliable electrical switching in distribution boards. Featuring a 40A current rating and 4 normally open (NO) contacts, it operates on a 230V AC control voltage. This device is ideal for controlling lighting, heating, and ventilation systems in residential and commercial installations, ensuring efficient power management and long-term operational stability.

## Long description

The Siemens 5TT5840-0 modular contactor is a robust electrical switching device engineered for integration into distribution boards. With a rated current of 40A and four normally open (NO) contacts, this unit provides reliable control for various electrical circuits. It is designed to operate on a 230V AC control voltage, making it a versatile component for managing power distribution in both residential and commercial environments.
Advantages
This modular contactor offers exceptional operational stability and durability, ensuring consistent performance in demanding electrical systems. Its compact design allows for efficient space utilization within standard distribution boards, while the high-quality construction guarantees long-term reliability. The device facilitates seamless switching of high-load circuits, contributing to effective energy management and system safety.
Suitable for
Controlling lighting systems in commercial buildings
Managing heating and cooling equipment
Operating ventilation and air conditioning units
Switching electrical loads in residential distribution boards
When it may not be suitable
This contactor is not intended for use in circuits exceeding its 40A current rating or for applications requiring different control voltages. It is also not suitable for environments with extreme moisture or corrosive conditions unless housed in an appropriate protective enclosure.
Key specifications
Rated current: 40A
Contact configuration: 4 normally open (NO) contacts
Control voltage: 230V AC
Weight: 0.374 kg
Mounting: Modular rail installation
How to use
The device should be installed by a qualified professional onto a standard DIN rail within a distribution board. Ensure that the control circuit is connected to the appropriate terminals and that the load circuit is wired according to the specified current ratings. Verify all connections are secure before energizing the system to prevent electrical faults.
What to consider before purchase
Ensure the 40A rating is sufficient for your specific load requirements
Verify that your control system provides a 230V AC signal
Check available space in your distribution board for modular mounting
Confirm the number of contacts meets your circuit design needs
Usage recommendations
Regularly inspect the contactor for signs of wear or loose connections during routine maintenance of the electrical distribution board to ensure continued safe and efficient operation.

## Specifications

### Weight & dimensions

| Feature | Value |
|---|---|
| Weight | 0.374 kg |

### Design

| Feature | Value |
|---|---|
| Product colour | Multicolour |

## FAQ

### How much does the Siemens 5TT5840-0 Modular Contactor cost, and is it available for purchase?

The price is 195.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 24 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 09.07.2026 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 5TT5840-0 Modular Contactor 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/1803824/47558038_large.webp