25G SFP28 CWDM 40KM LC Optical Transceiver

• Up to 25.78Gb/s data links
• CWDM DFB laser and APD receiver
• Up to 40km on 9/125um SMF
• Hot-pluggable SFP footprint
• Digital diagnostic capabilities
• Class 1 laser safety certified
• Cost effective SFP28 solution, enables higher port densities and greater bandwidth
• RoHS compliant and lead-free
• Single +3.3V power supply
• 2-wire interface for management specifications compliant with SFF-8472 digital diagnostic monitoring interface for optical transceivers
• All-metal housing for superior EMI performance
• Case operating temperature ：Commercial: 0 ~ +70°C、Extended: -10 ~ +80°C

25G CWDM 10KM	25G CWDM 40KM	25G DWDM 10KM	25G DWDM 15KM	25G LWDM 30KM
25G	25G	25G	25G	25G
10KM	40KM	10KM	15KM	30KM
CWDM	CWDM	DWMD	DWDM	LWDM
LC	LC	LC	LC	LC
SM	SM	SM	SM	SM
DDM	DDM	DDM	DDM	DDM
COM: 0°C ~70°C IND: -40°C ~85°C	COM: 0°C ~70°C IND: -40°C ~85°C	COM: 0°C ~70°C IND: -40°C ~85°C	COM: 0°C ~70°C IND: -40°C ~85°C	COM: 0°C ~70°C IND: -40°C ~85°C

Q1: What is a 25G SFP28 transceiver?
A1: 25G SFP28 transceiver is a compact, hot-pluggable optical module that supports 25Gbps data transmission over fiber or copper cables. It is widely used in data centers, telecom networks, and enterprise networks.

Q2: What are the key differences between SFP28 and SFP+?
A2: SFP28 supports 25Gbps speeds, while SFP+ supports 10Gbps. SFP28 is backward-compatible with SFP+ ports but requires appropriate configuration for optimal performance.

Q3: What distance can a 25G SFP28 SR transceiver cover?
A3: The 25G SFP28 SR (Short Reach) module typically supports up to 100 meters over OM4 multimode fiber (MMF).

Q4: Can 25G SFP28 modules work in 10G switches?
A4: Yes, most 25G SFP28 modules are backward-compatible with 10G SFP+ ports, but they will operate at 10Gbps speeds.

Q5: What are the common types of 25G SFP28 transceivers?
A5: SR (Short Reach) – Up to 100m over MMF
LR (Long Reach) – Up to 10km over SMF
ER (Extended Reach) – Up to 40km over SMF
Copper (DAC/AOC) – Short-distance direct attach solutions

Q6: What are the typical applications of 25G SFP28 transceivers?
A6: Data center spine-leaf architecture
5G fronthaul/midhaul networks
High-performance computing (HPC) clusters
Enterprise network upgrades from 10G to 25G

Q7: What is the wavelength of a 25G SFP28 LR transceiver?‌
A7: The 25G SFP28 LR module typically operates at ‌1310nm‌ wavelength, optimized for single-mode fiber (SMF) transmissions up to 10km.

Q8: How does 25G SFP28 compare to 100G QSFP28 in cost and performance?‌
A8: 25G SFP28 is more cost-effective for short-to-medium distances (≤10km), while 100G QSFP28 suits high-density 100G deployments.

Q9: Do 25G SFP28 modules support DDM/DOM monitoring?‌
A9: Yes, most MSA-compliant modules include ‌Digital Diagnostics Monitoring (DDM/DOM)‌ for real-time performance tracking.

Q10: What’s the future of 25G SFP28 with 50G/100G adoption?‌
A10: 25G remains relevant for cost-sensitive upgrades, especially in ‌5G fronthaul‌ and enterprise edge networks, despite higher-speed alternatives.