# Network transceiver module Mikrotik S-31DLC20D

**URL:** https://aio.lv/en/product--mikrotik-mt-s-31dlc20d--20358
**Data updated:** 2025-12-28 21:02 (EET)
**Category:** Network Transceiver Modules
**Manufacturer:** MikroTik
**Manufacturer code:** MT S-31DLC20D
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 33.49 €
**Prices and availability valid until:** 2026-07-20 23:59
**Price without VAT (21%):** 27.68 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--mikrotik-mt-s-31dlc20d--20358

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 23.07.2026 | free |
| Pickup points | 28.07.2026 | 1.89 EUR |
| Courier delivery to door | 28.07.2026 | 4.99 EUR |

## Summary description

The Mikrotik S-31DLC20D is a high-performance SFP network transceiver module with a maximum data transfer rate of 1250 Mbit/s. It operates at a wavelength of 1310 nm and features an LC fiber optic connector, ensuring reliable connectivity. Compatible with various MikroTik products such as RB260GS and RB2011 series, it provides seamless integration and enhanced network performance.

## Long description

The Mikrotik S-31DLC20D is a 1.25G SFP transceiver module operating at a wavelength of 1310 nm with a dual LC connector. Designed for single-mode fiber links up to 20 kilometers, the module supports a maximum data rate of 1250 Mbit/s and includes Digital Diagnostic Monitoring (DDM) for link and module status monitoring. It is compatible with a range of MikroTik devices and can interoperate with non-MikroTik SFP ports that accept standard SFP modules.
Advantages
The S-31DLC20D provides single-mode fiber connectivity over distances up to 20 km while maintaining a standard 1.25G SFP form factor. Built-in DDM enables real-time monitoring of optical parameters. Its LC duplex connector and 1310 nm wavelength suit common long-reach fiber deployments, and the module is tested for compatibility with multiple MikroTik router and switch models.
Suitable for
Long-reach single-mode fiber links up to 20 km
Upgrading MikroTik RB260GS, RB2011 and CCR1036 series with SFP ports
Interoperable connections between switches and routers using SFP modules
Key specifications
Interface type: SFP
Data rate: 1250 Mbit/s (1.25G)
Wavelength: 1310 nm
Connector: Dual LC (duplex)
Reach: Up to 20 km (single-mode fiber)
Features: DDM (Digital Diagnostic Monitoring)
How to use
Insert the S-31DLC20D into a compatible SFP slot on the network device until it seats securely. Connect LC duplex single-mode fiber cables to the module, observing transmit/receive orientation. Verify link status and data rate through the host device interface; use DDM readings if supported by the host to check optical power and temperature. Remove the module by disengaging any retention latch and pulling it straight from the SFP port.
Usage recommendations
Use single-mode LC duplex fiber patch cables rated for the intended distance and verify compatibility with the host device firmware. Avoid bending the fiber beyond recommended radii and ensure dust caps are used when the module is not connected.

## Specifications

### Performance

| Feature | Value |
|---|---|
| Interface type | SFP |
| Maximum data transfer rate | 1250 Mbit/s |
| Wavelength | 1310 nm |
| Fiber optic connector | LC |
| Maximum transfer distance | 20000 m |

### Features

| Feature | Value |
|---|---|
| Compatible products | RB260GS,RB2011LS, RB2011LS-IN, RB2011UAS-IN, RB2011UAS-RM, RB2011UAS-2HnD, RB2011UAS-2HnD-IN, CCR1036-12G-4S |

### Logistics data

| Feature | Value |
|---|---|
| Harmonized System (HS) code | 85369010 |

## FAQ

### How much does the Network transceiver module Mikrotik S-31DLC20D cost, and is it available for purchase?

The price is 33.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 132 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 23.07.2026 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 MikroTik 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 MikroTik 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: interface type, maximum data transfer rate, 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/20358/54578340_large.webp