VCSEL-based 850nm source for cost-effective short-reach links
Product images are illustrative renders for marketing reference; final delivered product is built to order per confirmed specifications.
GLC-SX-MM 1.25G SFP 850nm 550m Multimode 1000BASE-SX
GLC-SX-MM 1.25G SFP 850nm 550m Multimode 1000BASE-SX Duplex LC DDM Optical Module
This 1.25G Gigabit 1000BASE-SX SFP transceiver provides short-reach multimode connectivity at 850nm up to 550m, with a duplex LC interface and DDM monitoring. Coded to the GLC-SX-MM MSA standard, it is ideal for in-building switch, data-center and LAN links.
- 1000BASE-SX multimode short reach up to 550m
- 1.25Gb/s Gigabit rate with stable optical transmission
- Duplex LC interface — standard dual-fiber connectivity
- Real-time DDM monitoring of optical power, temperature and voltage
- Data rate
- 1.25 Gb/s
- Wavelength
- 850 nm
- Reach
- 550 m
- Interface
- Duplex LC
- Fibre / media
- Multimode Fiber (MMF)
- Diagnostics
- Yes
- Coded and confirmed for your host platform before production
- Samples for evaluation in the intended port
- Specification, test data and compliance paperwork with the order
Overview
What this module is for.
This 1.25G Gigabit 1000BASE-SX SFP transceiver provides short-reach multimode connectivity at 850nm up to 550m, with a duplex LC interface and DDM monitoring. Coded to the GLC-SX-MM MSA standard, it is ideal for in-building switch, data-center and LAN links.
Review the exact module, host platform and complete link requirement before ordering. Our inquiry keeps the configuration, host details and quantity together in one record.
Check the optical budget for your pathKey selling points
- 1000BASE-SX multimode short reach up to 550m
- 1.25Gb/s Gigabit rate with stable optical transmission
- Duplex LC interface — standard dual-fiber connectivity
- Real-time DDM monitoring of optical power, temperature and voltage
- MSA-compliant, hot-pluggable, 3.3V — plug-and-play with mainstream switches
Technical detail
Listed specifications.
Fields published for initial selection. The production datasheet, coding and marking are confirmed with the quotation.
| Parameter | Listed value |
|---|---|
| Type | Fiber Optic Transceiver (SFP) |
| Standard | 1000BASE-SX (GLC-SX-MM) |
| Data Rate | 1.25 Gb/s |
| Wavelength | 850 nm |
| Transmission Distance | 550 m |
| Connector | Duplex LC |
| Fiber Type | Multimode Fiber (MMF) |
| Supply Voltage | 3.3 V |
| DDM / DOM | Yes |
| Certification | CE |
Technical drawings
Dimensions, structure and interfaces.
Supplier drawings for this product family. Click any drawing to enlarge it — the callouts are readable at full size.
Drawings are illustrative. Confirm mechanical dimensions and interface details against the production datasheet before design-in.
Build quality
Details that decide reliability.
Gold-plated edge connector for high conductivity and stable signaling
Precision duplex LC optical port for reliable long-term connection
Fully MSA-compliant for broad switch compatibility
Where it is used
Typical applications.
- In-building and data-center switch interconnect
- LAN and campus backbone (multimode)
- Server and storage aggregation
- Short-reach Gigabit Ethernet links
Application notes describe common deployments for this product type. Confirm the design of your own link with the responsible engineering team.
Application concepts
OEM / ODM
Customization options.
- Commercial (0~70°C) and Industrial (-40~85°C) temperature grades
- OEM/ODM coding for major switch platforms
- OM2/OM3/OM4 multimode fiber options
- Neutral / custom export packaging
Availability, minimum quantity and lead time for customized configurations are confirmed in the quotation.
Discuss a custom configuration
Ordering
What is confirmed, and what we need from you.
Listed ordering information
- MOQ
- 1 piece
- Single package size
- 23 × 18 × 8 cm; gross weight ~1.0 kg
- Warranty
- 1 year
- Lead time
- samples in stock; bulk built to order
Include this in your inquiry
- Product reference and required quantity
- Host brand, model, port and software version
- Fibre or cable type, connector and installed reach
- Operating environment and temperature grade
- Destination, sample needs and requested schedule
MOQ, lead time, warranty and applicable documents are confirmed in the quotation.
FAQ
Questions about this model.
What link distance is listed for the GLC-SX-MM 1.25G SFP 850nm 550m Multimode 1000BASE-SX?
The listed reach is 550 m. Actual distance depends on the installed fibre loss, the number of connectors and splices and the receiver sensitivity at both ends, so confirm the optical budget for your own path before ordering. Our link budget calculator works through the arithmetic in a minute.
Which wavelength does this module use?
It is listed at 850 nm. Both ends of a duplex link must use the same wavelength plan.
What connector and fibre does it need?
The listed interface is Duplex LC on Multimode Fiber (MMF). Check that your patch cords, panel adapters and polarity match before installation.
Does it support DDM / DOM diagnostics?
Listed as: Yes. Digital diagnostics report optical transmit power, receive power, bias current, supply voltage and module temperature through the host, which makes commissioning and fault isolation far faster than swapping parts.
Can it be coded for my switch?
Yes. Send the host manufacturer, the exact model and the software version with your inquiry. Coding is confirmed per platform before production — a connector that fits does not by itself prove the host will accept the module.
Can I evaluate a sample first?
Include the required quantity, host platform and destination in your inquiry. Sample availability, charges and lead time are confirmed in the quotation, and we recommend testing in the intended port before a bulk order.
More in the procurement FAQ.
Related
Other models in this family.
1.25G BiDi Single-Fiber SFP Transceiver 1310nm/1550nm 20km
- Data Rate1.25 Gb/s
- Wavelength1310nm / 1550nm (WDM, single fiber BiDi)
- Transmission Distance20 km (series 3–120 km)
1.25G Gigabit BiDi SFP Transceiver 40km 1310nm/1550nm
- Data Rate1.25 Gb/s
- Wavelength1310nm / 1550nm (WDM, single fiber BiDi)
- Transmission Distance40 km
1.25G SFP 1310nm SMF Dual-Fiber Optical Transceiver 10km
- Data Rate1.25 Gb/s
- Wavelength1310 nm
- Transmission Distance10 km
1.25G SFP Dual-Fiber LC DDM 1550nm 80km Optical
- Data Rate1.25 Gb/s
- Wavelength1550 nm
- Transmission Distance80 km
Next step
Confirm this configuration with us.
Send the host platform, the installed link and the quantity. We will confirm coding, reach and lead time in the quotation.