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Product images are illustrative renders for marketing reference; final delivered product is built to order per confirmed specifications.

1.25G SFP

1.25G SFP BiDi Optical Module 20km 1310nm/1550nm SC

1.25G SFP BiDi Optical Module 20km 1310nm/1550nm SC Simplex Single-Fiber Transceiver

This 1.25G Gigabit single-fiber bidirectional (BiDi) SFP transceiver uses an SC simplex interface to transmit and receive over one strand of single-mode fiber up to 20km, pairing 1310nm and 1550nm WDM wavelengths. Built to the SFP MSA standard in a rugged zinc-alloy housing with DDM, it halves fiber usage for switch, data-center and Ethernet links.

  • Single-fiber BiDi design — 50% fiber saving over dual-fiber links
  • 1.25Gb/s Gigabit rate with stable, low-latency optical transmission
  • 1310nm/1550nm WDM pairing, 20km reach on single-mode fiber
  • SC simplex interface for secure, robust field connections
Data rate
1.25 Gb/s
Wavelength
1310nm / 1550nm (WDM, single fiber BiDi)
Reach
20 km
Interface
SC (Simplex)
Fibre / media
Single-Mode Fiber (SMF)
Diagnostics
Yes
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  • 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 single-fiber bidirectional (BiDi) SFP transceiver uses an SC simplex interface to transmit and receive over one strand of single-mode fiber up to 20km, pairing 1310nm and 1550nm WDM wavelengths. Built to the SFP MSA standard in a rugged zinc-alloy housing with DDM, it halves fiber usage for switch, data-center and Ethernet 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 path

Key selling points

  • Single-fiber BiDi design — 50% fiber saving over dual-fiber links
  • 1.25Gb/s Gigabit rate with stable, low-latency optical transmission
  • 1310nm/1550nm WDM pairing, 20km reach on single-mode fiber
  • SC simplex interface for secure, robust field connections
  • 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.

1.25G SFP BiDi Optical Module 20km 1310nm/1550nm SC — listed specifications
ParameterListed value
TypeFiber Optic Transceiver (SFP)
Data Rate1.25 Gb/s
Wavelength1310nm / 1550nm (WDM, single fiber BiDi)
Transmission Distance20 km
ConnectorSC (Simplex)
Fiber TypeSingle-Mode Fiber (SMF)
HousingZinc Alloy
Supply Voltage3.3 V
DDM / DOMYes
CertificationCE

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.

Drawing 1 of 4 — click to enlarge
Drawing 2 of 4 — click to enlarge
Drawing 3 of 4 — click to enlarge
Drawing 4 of 4 — click to enlarge

Drawings are illustrative. Confirm mechanical dimensions and interface details against the production datasheet before design-in.

Build quality

Details that decide reliability.

Color-coded bail latch for fast, error-free single-fiber A/B pairing

Gold-plated edge connector for high conductivity and stable signaling

Robust SC optical port for secure long-term connection

Rugged zinc-alloy housing with strong thermal stability

Where it is used

Typical applications.

  • Switch uplinks and data-center interconnect
  • Telecom and carrier access links
  • Enterprise, campus and metro Ethernet
  • FTTX single-fiber deployments

Application notes describe common deployments for this product type. Confirm the design of your own link with the responsible engineering team.

Application concepts
Network equipment in a data centre aisle

OEM / ODM

Customization options.

  • Commercial (0~70°C) and Industrial (-40~85°C) temperature grades
  • OEM/ODM coding for major switch platforms
  • Alternative reach options (3–120km)
  • Neutral / custom export packaging

Availability, minimum quantity and lead time for customized configurations are confirmed in the quotation.

Discuss a custom configuration
Optical module coding and test

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 ~2.0 kg
Warranty
12 months
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 1.25G SFP BiDi Optical Module 20km 1310nm/1550nm SC?

The listed reach is 20 km. 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 1310nm / 1550nm (WDM, single fiber BiDi). Single-fibre BiDi modules must be ordered as matched A/B pairs so the transmit wavelength at one end matches the receive wavelength at the other. Ordering two of the same end will not link.

What connector and fibre does it need?

The listed interface is SC (Simplex) on Single-Mode Fiber (SMF). 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.

All 1.25G SFP

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.

Request a quotation