25G SFP28 LR (10km) Optical Transceiver Module
Product Overview
The Apex 25G SFP28 LR module is the standard single mode 25 Gigabit interface, a 1310nm DFB transmitter and PIN receiver delivering 25GBASE-LR over one pair of single mode fiber to 10km. It is the duplex counterpart of the 25G BiDi part.
25G LR is used for switch uplinks, server and storage connections in single mode halls, and for metro or campus links where the span is under 10km. Because it runs on the single mode fiber already installed for longer services, it keeps one cable type across a site and avoids the multimode reach limits of the SR grade.
Every module is burnt in and tested for optical power, wavelength and error rate, reports live readings through DDM, and is coded for the host platform you name, whether that is a 25G switch, a server adapter or a fronthaul port. The 10km LR grade is held in stock for same day quoting, and SR, ER and BiDi 25G parts are available from the same line.
Key Features
- 25.78Gbps line rate compliant with 25GBASE-LR
- 1310nm DFB transmitter with PIN receiver
- 10km reach over standard single mode fiber
- SFP28 MSA hot pluggable package, duplex LC interface
- Digital Diagnostic Monitoring (DDM/DOM) with live optical readings
- Low power consumption, single 3.3V supply
- Covers 25G Ethernet and the CPRI rates used on fronthaul ports
- Stocked for same day quoting, RoHS compliant, coded for your platform
Technical Specifications
| Specification | Detail |
|---|
| Part Number | APX-SFP28-25G-10KM-LR |
| Manufacturer | Apex |
| Data Rate | 25.78Gbps (also 24.33Gbps for CPRI options 7 and 8) |
| Form Factor | SFP28, hot pluggable |
| Standard | 25GBASE-LR |
| Wavelength | 1310nm |
| Maximum Reach | 10km over SMF |
| Fiber Type | Single Mode Fiber (SMF) |
| Connector Type | LC duplex |
| Transmitter | DFB laser, uncooled |
| Receiver | PIN photodiode |
| DDM / DOM | Supported |
| Compliance | SFP28 MSA, IEEE 802.3by, RoHS |
| Temperature | 0 to 70C commercial, -40 to 85C industrial on request |
Applications
25G Switch and Server Uplinks
Connects access, aggregation and core switches or server adapters at 25G over the single mode fiber installed in the building.
Campus and Metro Links
Carries 25G between buildings, equipment rooms or a metro point of presence where the span is inside 10km.
Fronthaul and Mid Haul
Provides the 25G duplex interface between baseband and radio equipment or an aggregation site on single mode routes.
Compatibility
25G SFP28 LR modules are coded to the host platform you specify, including 25G switches, server adapters, storage systems and fronthaul equipment, and are tested on live ports before shipment. Where only one strand of fiber is available we quote the 25G BiDi part instead, and for spans beyond 10km the ER and ZR grades from the same line close the link.
Related Products
Frequently Asked Questions
What reach does a 25G LR module cover?
10km over standard single mode fiber, which covers most campus, metro access and in building single mode runs at 25G.
Should I use 25G LR or BiDi?
LR is the duplex part and uses two strands. If only one strand is available on the route, the 25G BiDi pair delivers the same 25G over that single fiber.
Is there an industrial temperature version?
Yes. The commercial 0 to 70C grade is standard and industrial -40 to 85C parts are available for outdoor cabinets and unheated shelters.
Are 25G LR modules in stock?
Yes. The standard 10km LR grade is held in stock and quoted the same day, with SR, ER and BiDi options available from the same line.
Why Choose Apex
- Optical engineering support and supply from 1.25G to 800G, including the full 25G SFP28 range.
- Stock on the 10km grade so urgent replacements ship without a long lead time.
- Every module is tested for optical power, wavelength and error rate before shipment.
- Backed by a 3 year warranty and technical support before and after the sale.
