# Fibre optic adapter ST EFB Elektronik 53103.3

**URL:** https://aio.lv/en/product--efb-elektronik-531033--3209851
**Data updated:** 2026-01-06 11:09 (EET)
**Category:** Fiber Optic Cables
**Manufacturer:** EFB Elektronik
**Manufacturer code:** 53103.3
**EAN:** 4049759023300
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 11.99 €
**Prices and availability valid until:** 2026-07-17 23:59
**Price without VAT (21%):** 9.91 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--efb-elektronik-531033--3209851

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 17.07.2026 | free |
| Pickup points | 22.07.2026 | 1.99 EUR |
| Courier delivery to door | 22.07.2026 | 4.99 EUR |

## Summary description

The EFB Elektronik 53103.3 is a single-mode fibre optic adapter with an ST connector type. It features a metallic finish and comes in a pack of 1 piece. This adapter is designed for reliable and high-performance connections in fibre optic networks, ensuring optimal signal transmission and minimal loss.

## Long description

ST simplex adapter with metal housing, model EFB Elektronik 53103.3. This single-mode fibre optic adapter uses an ST connector interface and is supplied as a single unit. The metal housing provides mechanical protection and stable alignment for fibre connections, and the adapter is suitable for panels or breakouts with an ST D-hole.
Advantages
The metal housing improves durability and grounding compared with plastic variants. The ST simplex design ensures straightforward insertion and removal of ST plugs while maintaining low insertion loss for single-mode fibres. A hexagon screw is supplied for secure installation in D-hole panels.
Suitable for
Single-mode fibre optic patch panels and wall plates with ST D-hole
Breakout boxes and enclosures requiring ST simplex adapter
Situations needing a metal-bodied adapter for improved mechanical strength
Key specifications
Connector type: ST simplex
Mode: Single-mode
Housing material: Metal
Package quantity: 1 piece
Manufacturer: EFB Elektronik, MPN 53103.3, EAN 4049759023300
How to use
Insert the adapter into a panel or breakout D-hole and secure it using the supplied hexagon screw. After fastening, plug an ST fibre connector into the adapter until it latches. For removal, depress the ST plug latch and pull the connector out, then loosen the screw to remove the adapter if needed.
Usage recommendations
Handle the fibre ends with appropriate cleaning procedures before connection to minimise insertion loss. Ensure the adapter is firmly secured in the panel to prevent misalignment; use the supplied screw and tighten to manufacturer-recommended torque if available.

## Specifications

| Feature | Value |
|---|---|
| Product colour | Metallic |
| Housing material | Metal |
| Connector type | ST |
| Fiber mode structure | Single-mode |
| Number of connectors | 2 |
| Duplex | No |
| Quantity per pack | 1 pc(s) |

## FAQ

### How much does the Fibre optic adapter ST EFB Elektronik 53103.3 cost, and is it available for purchase?

The price is 11.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 8 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 17.07.2026 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. 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 EFB Elektronik 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 EFB Elektronik 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/3209851/64206227_large.webp