# Terminal connector Simet STB 50-3X Al/Cu threaded busbar connector (MPN 81004020)

**URL:** https://aio.lv/en/product--simet-81004020--12398990
**Data updated:** 2026-04-27 22:32 (EEST)
**Category:** Miscellaneous repair tools
**Manufacturer:** Simet
**Manufacturer code:** 81004020
**EAN:** 5907813233838
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 18.99 €
**Prices and availability valid until:** 2026-07-11 23:59
**Price without VAT (21%):** 15.69 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--simet-81004020--12398990

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 01.07.2026 | free |
| Pickup points | 06.07.2026 | 1.99 EUR |
| Courier delivery to door | 06.07.2026 | 4.99 EUR |

## Summary description

Simet STB 50-3X is a threaded Al/Cu busbar (rail) connector designed for joining aluminium and copper conductors. Supplied under MPN 81004020, it provides a reliable mechanical and electrical connection for power distribution applications, repairs and installations where dissimilar metal conductors must be joined safely.

## Long description

Simet STB 50-3X Al/Cu threaded busbar connector is a mechanical terminal designed to join aluminium and copper conductors in power distribution systems. The connector provides a bolted, threaded connection that accommodates differences between Al and Cu conductors while maintaining electrical continuity and mechanical stability. It is intended for use where reliable clamping and low contact resistance are required in busbar or rail installations, repairs and extensions.
Advantages
The STB 50-3X connector features a threaded design that ensures a secure mechanical joint and predictable compression across joined conductors. Made to accommodate both aluminium and copper materials, it reduces the risk of galvanic corrosion when installed correctly with appropriate surface preparation and compatible protective measures. The product offers straightforward installation with standard tooling and delivers consistent electrical contact and mechanical strength suitable for distribution and industrial environments.
Suitable for
 Joining aluminium and copper busbars or conductors in power distribution systems
 On-site repairs and extensions of rail or busbar networks
 Electrical panels, switchgear and distribution boards where mixed-metal connections are necessary
 Industrial and commercial installations requiring robust bolted connections
When it may not be suitable
This connector is not intended for use as a substitution for purpose-designed explosion-proof or high-vibration connectors unless specifically rated for those environments. It may not be appropriate where specific approvals or certifications (such as for certain rail, marine or hazardous-area applications) are required unless verified by the installer. For extremely high-current applications, selection should be confirmed against system thermal and mechanical requirements.
Key specifications
 Material compatibility: aluminium to copper conductor connections
 Connection type: threaded bolted busbar connector
 Typical application: busbar/rail joining, power distribution
 Mechanical design: bolted clamp providing stable compression and electrical contact
 Installation: requires appropriate torque using standard tools
How to use
Prepare conductor surfaces by removing oxidation and contaminants to ensure good metal-to-metal contact. Position the aluminium and copper conductors within the connector and insert the threaded fastener. Tighten to the manufacturer-recommended torque using a calibrated torque wrench or appropriate tool to achieve reliable compression without over-tightening. If required, apply compatible anti-oxidation compound or corrosion prevention measures at the aluminium/copper interface following accepted industry practices. Verify mechanical stability and electrical continuity after installation.
What to consider before purchase
 Confirm compatibility with conductor cross-sections and busbar dimensions in your installation
 Check required torque values and ensure availability of appropriate installation tools
 Assess whether corrosion prevention measures are needed for mixed-metal joints
 Verify that the connector meets any site-specific regulatory or certification requirements
Usage recommendations
For reliable long-term performance, clean contact surfaces before assembly, use the recommended tightening torque, and consider applying suitable anti-oxidation treatment at aluminium-to-copper joints. Periodic inspection of the connection for signs of corrosion or loosening is advised in areas subject to temperature cycling or vibration.

## FAQ

### How much does the Simet STB 50-3X Al/Cu threaded busbar connector cost, and is it available for purchase?

The price is 18.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 5 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 01.07.2026 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 Simet 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 Simet 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/12398990/68681785_large.webp