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

MikroTik
SFP
1.25G
Duplex
20 km
1.25G SFP transceiver with a 1310nm Dual LC connector, for up to 20 kilometer Single Mode fiber connections, with DDM

MikroTik compatible S-31DLC20D - Key Features

  • Compatibility: MikroTik
  • Media Type: Single-Mode Fiber (SMF)
  • Fiber Count: Duplex
  • Connector: Double LC/UPC
  • Maximum Distance: 20 km
  • Guaranteed Link Budget: 13 dB
  • Tx Wavelenght: 1310 nm
  • Supported Data Rate: 1.063 Gbps - 1.25 Gbps
  • DDM/DOM: Supported
  • Temperature Range: Industrial -45°C - +85°C

MikroTik S-31DLC20D Price

SKUSKU:1.25G-SFP-20DI-MS
Lead timeIn Stock - Ships Next Business Day
Standard recommended retail price ex VAT:
5.62
Choice of 0+
Telecoms & Integrators Globally

MikroTik compatible S-31DLC20D Specifications

Form Factor
SFP
Media Type
Single-Mode Fiber (SMF)
Fiber Count
Duplex
Connector
Double LC/UPC
Maximum Distance
20 km
Guaranteed Link Budget
13 dB
TX Wavelength
1310 nm
RX Wavelength
1310 nm
Supported Data Rate
1.063 Gbps - 1.25 Gbps
Supportet Ethernet Applications
Gigabit Ethernet (1.25 Gbps)
Supported Fiber Channel Applications
1G Fiber Channel (1.0625 Gbps)
DDM/DOM
Supported
Tx Wavelength Bandwidth
100 nm (1260-1360 nm)
Rx Wavelength Bandwidth
100 nm (1260-1360 nm)
Minimum Transmitting Power
-9 dBm
Maximum Transmitting Power
3 dBm
Receiver Sensitivity
-22 dBm
Receiver Overload
-3 dBm
Dispersion
140-160 ps/nm ps/nm
Transmitter Type
FP Laser
Receiver Type
PIN photodiode
Temperature Range
Industrial -45°C - +85°C
Power
+3.3V single power supply
Compliance
CE, Class 1 FDA and IEC60825-1 Laser Safety Compliant, INF-8074i, RoHS, SFP MSA

MikroTik compatible S-31DLC20D Datasheet

v2

Complete technical specifications and product details

Updated:Jan 16, 2026Format:PDF

MikroTik compatible S-31DLC20D Description

MikroTik S-31DLC20D (Mikrotik SFP-1G-LR-SM) is a compatible SFP (Small Form factor Pluggable) Transceiver, its price and datasheet is based on our OEM product 1.25G-SFP-20D operating over Double Fiber Single-Mode Fiber (SMF) optical cable. It has a minimum guaranteed optical budget of 13 dB, which in most cases is enough to reach about 20 km distance. However, distance is just an indicative parameter calculated for comfort of identification. Eventually we calculate distance taking in account minimal optical budget and average attenuation of optical cabling in industry. This transceiver use top quality FP Laser transmitter with operating at nominal wavelength 1310 nm. and 1310 nm. PIN Photodiode receiver. It support DDM/DOM optical diagnostics, with provide diagnostic information about the present operating conditions. MikroTik S-31DLC20D compatible operates in Industrial -45°C - +85°C temperature range and has Double LC interface. SFP supports 1.063-1.25Gbps data rate and such applications as Gigabit Ethernet (1.25 Gbps) and 1G Fiber Channel (1.0625 Gbps). SFP Double Fiber optical transceiver is multi-purpose module used in number of different places of today’s networking. Consequently, most popular applications are Internet Service Provider (ISP) Gigabit Ethernet communication links, Enterprice LAN & SAN Networks, Data Center LAN & SAN Networks and other optical links.

MikroTik S-31DLC20D (Mikrotik SFP-1G-LR-SM) price and datasheet is based on our OEM product 1.25G-SFP-20D transceiver which is CE/RoHS certified and it is Compliant with product safety standards. We perform compatibility tests for the SFP transceiver with latest platforms of MikroTik networking equipment, which allows us to encode transceiver EEPROM memory to be compatible and work seamlessly with any MikroTik platform. However, our optical transceivers are compliant to SFP Multi Source Agreement INF-8074i industry standard as well. Because our focus is providing top quality service, we are performing serious quality checks before delivery of our products. As a result, we do optical parameter measurements, connector cleanness tests and SFP transceiver EEPROM memory data validation tests. We will be glad to know your requirements. Be sure to - Contact us.