MikroTik S-31DLC20D 1.25G SFP 1310 nm Transceiver 20 km
The MikroTik S-31DLC20D is a high-performance 1.25G SFP optical transceiver designed for long-distance fiber connectivity up to 20 kilometers over single-mode fiber (SMF). Operating at a 1310 nm wavelength, it features a dual LC connector and supports Digital Diagnostics Monitoring (DDM) for real-time performance and fault detection.
Engineered for reliability, low power consumption, and wide compatibility, the S-31DLC20D is fully compliant with SFP Multi-Source Agreement (MSA) standards and has been tested with popular MikroTik routers and switches including RB260GS, RB2011 series, and CCR1036-12G-4S. It also operates seamlessly with non-MikroTik SFP-compliant devices, ensuring flexibility across diverse networking environments.
Key Features
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1.25 Gbps SFP Optical Transceiver
Provides high-speed fiber connectivity for Gigabit Ethernet and optical uplinks. -
Long-Distance Transmission
Supports up to 20 km reach over single-mode fiber for campus, metro, and backbone links. -
1310 nm Wavelength (SMF)
Optimized for single-mode operation with low signal attenuation and minimal dispersion. -
Digital Diagnostics Monitoring (DDM)
Monitors optical power, temperature, and transceiver health in real time. -
Dual LC Connector
Ensures stable, low-loss connections with standard LC duplex patch cords. -
Wide Operating Temperature Range
Performs reliably from -40°C to +70°C, suitable for harsh or outdoor deployments. -
MSA-Compliant and Vendor-Compatible
Interoperates with MikroTik and third-party network devices supporting SFP interfaces.
Specifications
| Feature | Specification |
|---|---|
| Product Code | S-31DLC20D |
| Form Factor | SFP |
| Data Rate | 1.25 Gbps |
| Wavelength | 1310 nm |
| Connector Type | Dual LC (UPC) |
| Fiber Mode | Single Mode (SM) |
| Maximum Distance | 20 km |
| DDM Support | Yes |
| Operating Temperature | -40°C to +70°C |
| Transmission Standard | IEEE 802.3z 1000BASE-LX |
| Compatibility | MikroTik & MSA-compliant devices |
| Power Consumption | < 1 W |
| Certifications | CE, FCC, RoHS |
| Suggested Price | $29.00 |
What’s in the Box
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1 × MikroTik S-31DLC20D SFP Transceiver
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User Documentation
Why Choose MikroTik S-31DLC20D
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Reliable, cost-effective long-distance fiber connectivity (up to 20 km).
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Compatible with MikroTik routers, switches, and third-party SFP ports.
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Industrial-grade temperature tolerance for extended environmental endurance.
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Plug-and-play installation for simplified deployment.
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DDM technology enables proactive link performance monitoring.







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