Skip to content The 25G SFP28 module is the “golden rate” solution for connecting 10G and 100G era. It provides 2.5 times the bandwidth of 10G with a slight increase in power consumption and cost, and has become the mainstream choice for data center ToR architecture and 5G fronthaul networks. Its packaging is the same as 10G SFP+, supporting backward compatibility for smooth network upgrades.
The 25Gb SFP optical module is a high-speed module used for interconnecting 25G Ethernet with data center servers and switches. It is packaged in SFP28 and has a speed of 25.78Gbps. They are more efficient than 10G and lower in cost than 40G/100G. Common types include SR (short distance 100m), LR (long distance 10km), and WDM color light modules (used for 5G fronthaul).
According to the fiber type, transmission distance, and core technology inside each SFP 28 module, there are approximately several types of 25G transceivers, and the approximate parameters are shown in the table below:
Model | Fiber type | Optical interface | Max transmission distance | Core technology | Typical application |
SR | MMF | Duplex LC | 70m (OM3) / 100m (OM4) | 850nm VCSEL | Internal servers in the data center are connected to TOR switches for high-density, low-cost, and short-range transmission |
ESR (enhanced SR) | MMF | Duplex LC | 300m (OM4) | 850nm VCSEL (performance enhancement) | Between SR and LR, used for campus network backbone links or extending the service life of old multimode fibers |
LR | SMF | Duplex LC | 10km | 1310nm DFB laser | The interconnection between buildings in the park/metropolitan area network, short distance DCI in the data center, and the need for long-distance stable transmission scenarios |
ER | SMF | Duplex LC | 40km | 1550nm EML laser | Metropolitan area edge access, telecommunications level long-distance transmission |
80km BiDi | SMF | SimplexLC | 80km | Single fiber bidirectional, WDM technology | Ultra long distance DCI, long-distance transmission with tight fiber resources, using one fiber to achieve transmission and reception, saving 50% of fiber resources |
CWDM/DWDM | SMF | Duplex LC | 10km – 80km+ | CWDM/DWDM wavelength | Wavelength division multiplexing system greatly saves fiber resources, and DWDM is suitable for ultra long distance and multi-channel transmission |
Tunable DWDM | SMF | Duplex LC | 10km+ (Depends on the link) | Tunable laser | 5G forward/backward transmission, operator grade dynamic wavelength allocation, one module can support multiple wavelengths, simplifying spare parts inventory |
DAC/AOC | Copper wire / Fiber | SFP28 direct attach | 1m – 7m (DAC) / ~30m (AOC) | Pre terminated wiring cable | Ultra short distance interconnection inside the cabinet, extremely low power consumption of DAC, AOC is softer and longer than DAC |
When choosing a 25G optical module, it is important to balance distance, cost, and fiber resources. Please pay attention to the following details:
Transceiver distance | Recommend model | Recommend reason |
Within 100 m | SR module | Pursuing cost-effectiveness and low power consumption, SR module is the preferred choice, paired with OM3/OM4 multimode fiber, with the lowest cost and minimum power consumption (<1W), making it a classic solution for connecting internal cabinets in data centers. |
100-300 m | ESR module | When you want to use existing OM4 multimode fiber to transmit 200-300 meters without switching to a more expensive single-mode solution, ESR is a good supplement. |
300 m to 10 km | LR module | This is the most widely used and standardized long-distance single-mode solution, paired with OS2 single-mode fiber, with stable and reliable performance, suitable for interconnection between buildings or data centers in industrial parks. |
10-40 km and beyond | ER (40km) or 80km BiDi (80km) module | ER is a standard telecommunications long-distance solution. If fiber optic resources are scarce, the 80km BiDi module can achieve 80 kilometers of transmission on one fiber optic cable, which is an excellent choice for utilizing existing fiber optic cables. |
Special scenarios for 5G fronthaul and flexible wavelength requirements | Tunable DWDM module | The preferred choice for 5G fronthaul networks is the Tunable DWDM module, which can flexibly switch between 48 DWDM wavelength channels, greatly simplifying network planning and spare parts management, and meeting industrial grade temperature requirements. |
25Gbase er SFP28 generally requires DFB laser and APD receiver, which can utilize its high sensitivity to compensate for the high attenuation caused by long-distance transmission and ensure communication reliability.
The 25G CWDM 40km is in mass production, it will take about 1 week to be ready. If urgently need, please inform us in advance.
10g sfp+ transceiver can be inserted into SFP28 ports, which will automatically "slow down" to 10Gbps to match the SFP+ transceiver, and the link will operate normally at a rate of 10G. On the contrary, it is not possible.
Yes, transceiver stickers and sfp28 encoding inside are available, please discuss the details with sales team before production.
For better protection, we always use blister boxes for all 25 Gb SFP transceivers, but if you have any special request, let’s talk further.
Yingda adopts very refined cost management while ensuring quality, in order to provide more competitive prices to customers and strive to gain more profit margins for them. If there is a decrease in material prices, we will notify customers as soon as possible and offer discounts to them.
Yes, yingda offer sfp electrical loopback and fiber optic loopback as well.
Yes, our 25 Gig SFP transceiver can be used on Nokia equipment, we can add a Nokia compatibility code. If you are afraid of errors, we suggest to send the corresponding optical module samples for testing with your device first. If the testing is successful, we can then discuss the bulk order.
High productivity efficiency, skilled front-line operators and strict production control ensure timely delivery.
High-precision testing equipment and top industry quality control system ensure high quality standards.
Long-term stable supply chain and cost control that changes in line with market trends ensure the best price
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