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Compact SFP transceiver module with dual LC ports and a matte metal finish

Mikrotik

Mikrotik S-31DLC20D 1.25G SFP 1310nm 20km SM

SKU CH-NCRN-EZKQQ

A 1.25G SFP transceiver with 1310nm Dual LC connector for 20km single-mode fiber links and DDM support

  • Product typeTransceiver
  • Media conversionDual LC connector
  • Optical wavelength1310 nm
  • Fiber modeSingle-mode Optical Fiber
  • Maximum range20KM
  • 25 Gbps data rate for fast fibre links
  • 1310 nm wavelength suits single-mode deployments
  • 20 km reach extends campus or metro connections
  • Dual LC connector simplifies patch-panel cabling
  • DDM support enables real-time link monitoring

Mikrotik 1.25G SFP 20km Transceiver

The Mikrotik S-31DLC20D is a 1.25G SFP transceiver with a 1310nm Dual LC connector. It supports single-mode fiber connections up to 20 kilometers. Digital diagnostics monitoring is included for link health visibility.

Suitable for 20km single-mode links

This module suits network operators extending Mikrotik routers such as the RB2011 or CCR1036 series over long-haul single-mode fiber. It is not for buyers needing multi-mode cabling, shorter reach optics, or higher bandwidth interfaces like 10G SFP+.

1310nm wavelength and 20km reach

The 1310nm wavelength combined with a 20 kilometer maximum distance on single-mode fiber is the specification that determines compatibility with your link budget and fiber plant. Verify your endpoint equipment accepts this wavelength and distance rating before purchase.

How it compares

Measured against everything we stock in SFP & SFP+ Transceiver Modules, at today’s prices. Recalculated every night.

Price $29.99
Cheaper than about 88% of the 1,471 comparable items (median $138.99).

Specifications

Product
Brand nameMikrotik
Model nameS-31DLC20D
Product typeTransceiver
Connectivity
Optical wavelength1310 nm
Fiber modeSingle-mode Optical Fiber
Maximum range20KM
More details
Media conversionDual LC connector

Questions about this item

Which MikroTik switches and routers have SFP ports that accept this 1.25G 1310nm 20 km transceiver?

Tested compatible models include RB260GS, RB2011LS, RB2011LS-IN, RB2011UAS-IN, RB2011UAS-RM, RB2011UAS-2HnD, RB2011UAS-2HnD-IN and CCR1036-12G-4S.

Can this module link to a non-MikroTik SFP device over 20 km single-mode fiber?

Yes, the supplier confirms compatibility with non-MikroTik SFP devices using the same 1310nm wavelength and distance rating.

How can I verify the link is healthy after installing the transceiver?

Enable DDM in the RouterOS interface menu to monitor real-time optical power, temperature and voltage readings on the module.

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