# Siemens 5ST3743 Busbar 10mm² 3-Phase + Auxiliary Switch 214mm

**URL:** https://aio.lv/en/product--siemens-5st3743--12462266
**Data updated:** 2026-05-18 09:33 (EEST)
**Category:** Power Sockets
**Manufacturer:** Siemens
**Manufacturer code:** 5ST3743
**EAN:** 4001869313115
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 13.99 €
**Prices and availability valid until:** 2026-07-18 23:59
**Price without VAT (21%):** 11.56 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--siemens-5st3743--12462266

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 13.07.2026 | free |
| Pickup points | 16.07.2026 | 1.99 EUR |
| Courier delivery to door | 16.07.2026 | 4.99 EUR |

## Summary description

The Siemens 5ST3743 is a 214 mm long comb-type busbar designed for efficient electrical distribution. It features a 10 mm² cross-section and is configured for 3-phase systems with an integrated auxiliary switch connection. Manufactured in Germany, this high-quality component ensures reliable connectivity and safety in modular electrical installations. Ideal for professional panel building and industrial power distribution applications.

## Long description

The Siemens 5ST3743 is a professional-grade comb-type busbar engineered for efficient and reliable electrical distribution in modular installations. With a length of 214 mm and a cross-section of 10 mm², this component is specifically designed to support 3-phase systems while providing an integrated connection for an auxiliary switch. Manufactured in Germany, it meets high safety and quality standards, ensuring consistent performance in demanding industrial and commercial electrical panel environments.
Advantages
This busbar offers significant benefits for electrical assembly by streamlining the wiring process and reducing the number of individual connections required. Its touch-safe design enhances operator safety during installation and maintenance. The ability to cut the busbar to the desired length provides flexibility for various panel configurations, while the included end caps ensure proper insulation and protection against accidental contact. The robust construction ensures long-term durability and stable electrical conductivity.
Suitable for
3-phase electrical distribution systems
Modular electrical panel building
Industrial power distribution boards
Installations requiring auxiliary switch integration
When it may not be suitable
This busbar is not intended for use in systems exceeding its 10 mm² cross-section capacity or for applications requiring a different phase configuration than the 3-phase design provided. It is also not suitable for environments where the physical length of 214 mm is insufficient for the specific layout of the circuit breakers being connected.
Key specifications
Cross-section: 10 mm²
Configuration: 3-phase + auxiliary switch
Length: 214 mm
Design: Pin-type, touch-safe
Features: Cuttable, includes end caps
How to use
To install the Siemens 5ST3743, first determine the required length for your specific circuit breaker arrangement and cut the busbar accordingly if necessary. Ensure that the end caps are securely fitted to the exposed ends to maintain touch-safety. Align the pins with the terminals of the modular devices and insert them firmly to ensure a secure electrical connection. Verify that all connections are tight and that the busbar is properly seated before energizing the system.
What to consider before purchase
Verify the compatibility of the pin spacing with your specific circuit breakers.
Ensure the 10 mm² cross-section is sufficient for the total current load of your circuit.
Confirm that the 214 mm length is adequate for the number of modules in your row.
Check that the auxiliary switch configuration matches your system requirements.
Usage recommendations: Always ensure the power supply is completely disconnected before installing or modifying the busbar. Use only with compatible modular devices and ensure all safety regulations for electrical installations are followed.

## Specifications

| Feature | Value |
|---|---|
| Type | 1P |
| Length | 214 mm |
| Current | 63 A |

### Packaging data

| Feature | Value |
|---|---|
| Quantity per pack | 1 pc(s) |

### Design

| Feature | Value |
|---|---|
| Product colour | Grey |

### Logistics data

| Feature | Value |
|---|---|
| Country of origin | Germany |

## FAQ

### How much does the Siemens 5ST3743 Busbar 214mm cost, and is it available for purchase?

The price is 13.99 € (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 13.07.2026 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 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: 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.

### Where can I download the instructions for Siemens 5ST3743 Busbar 214mm?

You can download the instructions in PDF format from the “Instructions” section on the product description page. The file contains complete information about installation, setup, and usage.

## Image

https://aio.lv/img/cache/product/12462266/68771011_large.webp