MikroTik 1.25G Single Mode SFP Transceiver 20km Dual LC (S-31DLC20D)

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  • Performance: 1.25 Gbps / 20km Range.
  • Tech: 1310nm Single Mode Dual LC with DDM.
  • Fast shipping to Latvia, as well as Estonia and Lithuania. 2-Year Warranty.

MIKROTIK

22,49€
€18.59 (bez PVN)

Out of stock

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

S-31DLC20D is a 1.25G SFP transceiver with a 1310nm Dual LC connector, for up to 20 kilometer Single Mode fiber connections, with DDM

Units are tested and compatible with RB260GS,RB2011LS, RB2011LS-IN, RB2011UAS-IN, RB2011UAS-RM, RB2011UAS-2HnD, RB2011UAS-2HnD-IN, and CCR1036-12G-4S. Units are compatible with non-MikroTik SFP devices as well.

SummaryMikrotik S-31DLC20D. Maximum data transfer rate: 1250 Mbit/s, Interface type: SFP, Fiber optic connector: LC. Compatible products: RB260GS,RB2011LS, RB2011LS-IN, RB2011UAS-IN, RB2011UAS-RM, RB2011UAS-2HnD, RB2011UAS-2HnD-IN,…
Unit Box Height0.008
Unit Box Length0.056
Unit Box Width0.012
Fiber optic connectorLC
Interface typeSFP
Maximum data transfer rate1250Mbit/s
Maximum transfer distance20000m
Wavelength1310nm
Compatible productsRB260GS,RB2011LS, RB2011LS-IN, RB2011UAS-IN, RB2011UAS-RM, RB2011UAS-2HnD, RB2011UAS-2HnD-IN, CCR1036-12G-4S
Harmonized System (HS) code85369010
ModelS-31DLC20D
Units per Shipping Box1
Unit Calculated Volume5.376E-06cubm
Unit Calculated Weight0.018kg
SKU: MIKROTIK-S-31DLC20D Category:

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  1. Nathan Miller –

    I recently picked up this MikroTik SFP for a fiber run, and it’s been working flawlessly with my RB2011 setup. The 20km range is solid, and I really appreciate the DDM support for monitoring. Great price and fast shipping from apsardze24.lv. Highly recommended for anyone needing a reliable single-mode connection!

    Nathan Miller –

Is the MikroTik S-31DLC20D compatible with multi-mode (OM3/OM4) fiber cabling?

No, this transceiver is designed specifically for 1310nm Single Mode fiber. It will not function correctly or reach its rated distance over Multi-mode cabling.

What real-time diagnostics can I see through the DDM support?

Digital Diagnostic Monitoring (DDM) allows you to view the transceiver's temperature, supply voltage, and both the transmitted and received optical power levels directly within your router's interface.

How do I troubleshoot a link that won't come up even with the correct fiber?

Check that the TX and RX strands are not swapped at one end and ensure 'Auto-Negotiation' is configured correctly; for further assistance, please contact our technical support at apsardze24@gmail.com.

What happens if the product fails within the first two years?

Purchasing from Apsardze24.lv includes a 2-year warranty; our local service center in Riga provides fast support and replacements compared to international marketplaces.

What is the exact fiber connector type required for this 1.25G transceiver?

The S-31DLC20D requires a Dual LC connector. Ensure your fiber optic patch cable is terminated with LC plugs to match the interface on the transceiver.

Do I need a signal attenuator if I use this 20km module for a very short connection?

Generally, for distances under 2-3 meters, you should monitor the RX power levels via DDM; if the signal is too strong, an attenuator may be needed to prevent receiver saturation, though modern MikroTik units are quite resilient.

How long does shipping take for orders delivered to Estonia or Lithuania?

Apsardze24.lv offers fast shipping across the Baltics, with most orders reaching customers in Estonia and Lithuania within 1 to 3 business days.

Can I install this 1.25G SFP module into a 10G SFP+ port?

Most SFP+ ports are backwards compatible with 1G modules, but you must manually configure the port speed to 1000Mbps in your software settings to establish a link.

Can I use the MikroTik S-31DLC20D with brands like Cisco or Ubiquiti?

Yes, while tested extensively with MikroTik devices like the CCR1036 and RB2011 series, this is a standard MSA-compliant SFP module that is compatible with most non-MikroTik networking equipment.

Does the S-31DLC20D package include a pair of transceivers or just one?

Each unit box contains one single SFP transceiver. For a standard point-to-point fiber link between two switches, you will need to purchase two units.

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