? Message us on When it comes to building a high-speed and stable fiber network, choosing the right transceiver module is critical. The MikroTik S+85DLC03D SFP Transceiver stands out as one of the most trusted solutions for short-range 10-Gigabit Ethernet connections. Designed by MikroTik, a global leader in network technology, this transceiver delivers both performance and compatibility, ensuring smooth data transmission across switches, routers, and servers. For businesses and network administrators who need dependable 10G links over multimode fiber, this module is a perfect fit.
Comprehensive Overview of MikroTik S+85DLC03D Transceiver
The MikroTik S+85DLC03D Transceiver (part number S+85DLC03D) is a 10-Gigabit SFP+ module specifically designed for multimode fiber (MMF) connections up to 300 meters. Operating on the 850 nm wavelength, it uses Duplex LC connectors, allowing seamless integration with standard networking equipment. This model is fully compliant with SFP+ MSA (Multi-Source Agreement) standards, making it compatible with most 10G switches and routers from MikroTik as well as many third-party brands.
What makes this transceiver particularly valuable is its combination of high performance, low power consumption, and plug-and-play usability. It is hot-swappable, meaning it can be inserted or removed without powering down the device. The S+85DLC03D offers a robust build with advanced optical components, ensuring long-term stability and consistent throughput even under continuous network load. This module is ideal for data centers, enterprise backbones, and high-speed fiber uplinks between distribution switches.
Key Features and Advantages
- 10 Gbit/s data rate for high-speed connectivity
- 850 nm wavelength designed for short-distance multimode links
- 300 m maximum distance over OM3/OM4 fiber
- Duplex LC connector for secure and simple cabling
- Hot-pluggable design with SFP+ slot compatibility
- Low power consumption for energy-efficient operations
- Fully compliant with IEEE 802.3ae and SFF-8431 standards
- High reliability and interoperability with MikroTik and other vendors
Applications of MikroTik S+85DLC03D Transceiver
The MikroTik S+85DLC03D Transceiver is widely used in environments that require high-speed connections across short distances, typically within a data center or enterprise network rack. It is perfect for:
- Linking core switches with access or distribution switches
- Connecting servers to 10 G uplinks in virtualized environments
- Creating high-speed storage area networks (SAN)
- Uplink connections between MikroTik CRS, CCR, or Cloud Core Router models
- Deployments that require redundancy or backup fiber links
Because it uses multimode fiber, it provides an economical solution compared to long-range single-mode optics while maintaining excellent data integrity and low latency.
Ports and Interface Details
The MikroTik S+85DLC03D uses a Duplex LC connector, one of the most common fiber interfaces in enterprise networking. It is designed for SFP+ slots, supporting 10 Gigabit Ethernet (10GBASE-SR) links. The transmit (Tx) and receive (Rx) channels work simultaneously, enabling full-duplex communication. The LC interface is easy to manage, secure, and offers minimal insertion loss.
In terms of electrical interface, the transceiver connects through the standard SFI (Serial Fiber Interface) inside SFP+ cages, ensuring compatibility with MikroTik switches like the CRS317, CRS326, and CCR2004 series. Its hot-swappable nature simplifies installation and maintenance — a key advantage in dynamic network environments.
Boosting Performance in Enterprise Networks
In a modern data center, latency and reliability are everything. Deploying MikroTik S+85DLC03D Transceiver modules between top-of-rack (ToR) switches and aggregation layers allows network engineers to achieve consistent 10 G performance while keeping costs under control. The short-range multimode fiber connection (up to 300 m) is perfect for intra-building fiber links, avoiding the higher expense of single-mode optics.
In addition, the transceiver works flawlessly with MikroTik’s RouterOS and SwitchOS platforms, automatically detected and configured for optimal performance. For IT managers, this means less downtime, simpler integration, and lower total cost of ownership.
How to Extend Fiber Network Efficiency with S+85DLC03D
One of the biggest challenges in network design is ensuring a balance between speed, cost, and compatibility. The S+85DLC03D solves this by offering a cost-effective solution that supports 10 G performance without requiring expensive single-mode infrastructure.
When paired with MikroTik switches such as the CRS312-4C+8XG-RM or CRS310-1G-5S-4S+IN, administrators can easily scale their fiber network, connecting multiple racks, floors, or server clusters. Because this transceiver is fully MSA-compliant, it also integrates seamlessly with equipment from other vendors, ensuring flexibility for future upgrades.
Comparing MikroTik S+85DLC03D with Similar Modules
| Model | Type | Fiber Mode | Wavelength | Distance | Connector | Data Rate | Typical Use Case |
|---|---|---|---|---|---|---|---|
| S+85DLC03D | SFP+ | Multimode | 850 nm | 300 m | LC Duplex | 10 G | Short-range 10 G links |
| S+31DLC10D | SFP+ | Single-mode | 1310 nm | 10 km | LC Duplex | 10 G | Long-distance 10 G connections |
| S+31DLC20D | SFP+ | Single-mode | 1310 nm | 20 km | LC Duplex | 10 G | Extended fiber backbones |
| S+2332LC10D | SFP+ BiDi | Single-mode | TX 1330 nm / RX 1270 nm | 10 km | LC Simplex | 10 G | Single-fiber deployments |
From the comparison, it’s clear that the S+85DLC03D Transceiver is optimized for short-range, high-speed connections inside data centers or office buildings, while models like S+31DLC10D and S+31DLC20D are intended for long-distance single-mode fiber links.
Technical Specifications of MikroTik S+85DLC03D
| Specification | Details |
|---|---|
| Product Code | S+85DLC03D |
| Form Factor | SFP+ (Enhanced Small Form-Factor Pluggable) |
| Data Rate | 10 Gbps |
| Fiber Type | Multimode |
| Wavelength | 850 nm |
| Connector Type | LC Duplex |
| Maximum Distance | 300 m (OM3 fiber) |
| Standard Compliance | IEEE 802.3ae, SFF-8431, SFP+ MSA |
| Transmitter Type | VCSEL laser |
| Receiver Type | PIN photodiode |
| Operating Temperature | 0 °C to +70 °C |
| Power Supply | 3.3 V |
| Power Consumption | < 1 W |
| Hot-Swappable | Yes |
| Compatibility | MikroTik and third-party SFP+ ports |
| Applications | Data center, enterprise LAN, 10 G short-range fiber links |
Expert Tip: Optimize Fiber Infrastructure for Short-Range 10G Links
When planning high-speed networks, it’s tempting to over-invest in long-range optics. However, for distances under 300 m, the MikroTik S+85DLC03D Transceiver offers all the performance you need at a fraction of the cost. Pairing it with OM3 or OM4 multimode fiber ensures optimal results.
Before deployment, always clean the LC connectors and check fiber polarity — even a small amount of dust or mismatch can cause signal loss. Keeping your transceivers properly handled and capped when not in use prolongs their life and maintains optical clarity.
Installing and Testing S+85DLC03D Transceiver
- Power on your device – MikroTik switch or router.
- Insert the S+85DLC03D Transceiver gently into the SFP+ port until it clicks.
- Connect LC duplex cable (Tx to Rx, Rx to Tx).
- Check status in RouterOS under Interfaces → SFP menu.
- Verify link speed shows 10 Gbit/s and that the module is detected.
- Run a bandwidth test using MikroTik’s built-in tools to confirm performance.
If the device does not recognize the transceiver, ensure it’s inserted fully and fiber polarity is correct. The S+85DLC03D is plug-and-play, requiring no additional configuration.
FAQs
1. What is the main function of the MikroTik S+85DLC03D Transceiver?
It enables 10-Gigabit Ethernet communication over multimode fiber up to 300 meters.
2. Can I use this transceiver with non-MikroTik devices?
Yes, it is MSA-compliant and works with most standard 10G SFP+ ports.
3. What fiber type should I use?
OM3 or OM4 multimode fiber cables with LC connectors are recommended.
4. Is it compatible with MikroTik CRS and CCR series?
Absolutely. It works seamlessly with MikroTik CRS3xx, CRS1xx, and CCR2xxx models.
5. What wavelength does it use?
It operates at 850 nm, ideal for short-range multimode fiber links.
6. How far can it transmit data?
The maximum range is approximately 300 meters over OM3 fiber.
7. Is the S+85DLC03D hot-swappable?
Yes. It can be inserted or removed without shutting down the device.
8. How much power does it consume?
Less than 1 W, making it energy efficient for dense deployments.
9. Can I use this in outdoor enclosures?
It’s designed for indoor environments, within an operating range of 0 °C to 70 °C.
10. What’s the difference between S+85DLC03D and S+31DLC10D?
The S+85DLC03D is multimode for short distances (300 m), while the S+31DLC10D is single-mode for longer distances (10 km).
Conclusion
The MikroTik S+85DLC03D Transceiver is a powerful, reliable, and cost-effective solution for high-speed multimode fiber links in enterprise and data center networks. With its 10 Gbit/s capacity, 850 nm wavelength, and simple LC interface, it provides the performance needed for short-range fiber connections without breaking the budget.
For IT administrators, installers, and resellers, this module represents an ideal combination of efficiency, interoperability, and MikroTik-grade quality. Whether you’re upgrading your existing infrastructure or building a new 10 G backbone, the MikroTik S+85DLC03D Transceiver ensures a strong, stable, and future-proof connection.
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