MikroTik S-35/53LC20D 1.25G Single Mode 20km BiDi SFP Transceiver Pair (S-3553LC20D)

  • Data Rate: 1.25 Gbps High-Speed Throughput
  • Distance: Up to 20km over Single Mode Fiber
  • Connector: Single LC Interface (WDM/BiDi)
  • Tech: Digital Diagnostics Monitoring (DDM) support
  • Service: Fast shipping to Latvia, as well as Estonia and Lithuania. 2-Year Warranty for all clients (Business & Private).

MIKROTIK

62,56€
€51.70 (bez PVN)

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

S-35/53LC20D is a pair of SFP transceivers, the S-35LC20D is a 1.25G Single Mode optical SFP module with a LC connector, T1310nm/R1550nm, which works for connections up to 20km and supports DDM. The S-53LC20D is a 1.25G Single Mode optical SFP transeiver with an LC connector,T1550nm/R1310nm, which works for connections up to 20km and supports DDM.

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

SummaryMikrotik S-3553LC20D. 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 Height0.02
Unit Box Length0.05
Unit Box Width0.02
Fiber optic connectorLC
Interface typeSFP
Maximum data transfer rate1250Mbit/s
Maximum transfer distance20000m
Compatible productsRB260GS, RB2011LS, RB2011LS-IN, RB2011UAS-IN, RB2011UAS-RM, RB2011UAS-2HnD, RB2011UAS-2HnD-IN CCR1036-12G-4S
Harmonized System (HS) code85369010
Units per Shipping Box10
Unit Calculated Volume0.0001582cubm
Unit Calculated Weight0.055kg
SKU: MIKROTIK-S-3553LC20D Category:

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  1. Ieva Kalniņa –

    Bought these SFP modules from apsardze24.lv to link my remote buildings. Installation was a breeze, and they worked perfectly right out of the box with my Mikrotik gear. The connection is rock-solid over the 20km stretch. Really impressed with the fast delivery and the reliable hardware. Highly recommended!

    Ieva Kalniņa –

How does this BiDi SFP pair communicate over a single LC fiber strand?

It uses Wavelength Division Multiplexing (WDM) to send and receive data at different wavelengths (1310nm and 1550nm) simultaneously. This allows you to utilize only one strand of single-mode fiber instead of the two strands required by traditional SFPs.

Does the S-35/53LC20D support Digital Diagnostics Monitoring (DDM)?

Yes, both modules in the pair support DDM, which allows you to monitor real-time parameters like optical output power, receiver power, and temperature through your router's operating system. This is critical for troubleshooting link stability.

Do I need to purchase two S-35/53LC20D kits to establish a connection between two devices?

No, this product is sold as a pre-matched pair containing one S-35LC20D and one S-53LC20D module. You simply install one module on each end of your fiber link to establish a complete bidirectional connection.

What kind of fiber optic cable is required for this specific MikroTik pair?

You must use 9/125µm Single Mode Fiber (SMF) terminated with a single LC connector on each side. These modules are not compatible with Multimode fiber (OM3/OM4), which would cause immediate signal failure.

What should I check if the SFP modules are plugged in but the link remains down?

Ensure you have installed the S-35 module on one end and the S-53 on the other, as two identical modules cannot link. If the fiber is clean and correctly seated but the link still fails, contact our technical support at apsardze24@gmail.com.

What is the warranty period for these transceivers when purchased from your store?

Apsardze24.lv provides a full 2-year warranty for both private and business customers. Our local service center in Riga ensures that any technical claims or replacements are processed quickly and efficiently.

Is it safe to use these 20km transceivers for very short fiber runs under 500 meters?

While they will function, using high-power 20km optics over very short distances may occasionally saturate the receiver. If you encounter high error rates on short runs, you might need an optical attenuator or should consult Apsardze24.lv for a shorter-range module recommendation.

How fast can I get these transceivers delivered to Estonia or Lithuania?

We provide fast shipping across the Baltics, typically delivering to addresses in Lithuania and Estonia within 1-3 business days. All units are shipped from our local stock to ensure minimal waiting time.

Can the MikroTik S-3553LC20D be used in Cisco or Ubiquiti switches?

Yes, these transceivers are compatible with both MikroTik hardware and most standard non-MikroTik SFP devices. They follow the industry-standard SFP multi-source agreement (MSA) to ensure broad hardware interoperability.

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