Product
1G SFP BiDi Optical Transceiver, 20km TX1310/RX1550nm Single-Mode, LC/SC, DDM - Compatible BIDI SFP - AstraPhoton
1G SFP BiDi TX1310/RX1550nm 20km- AstraPhoton model
- APT1SB131520K
- Catalogue reference
- SG-SML-20
- Data rate
- 1G
- Wavelength
- 1310/1550
- Reach
- 20KM
- Form factor
- BIDI SFP
Key specifications
Original part-number references
These references compare optical specifications. Confirm the host device, firmware and coding profile before deployment.
| Brand | Original part number | Model reference | Optical specification reference | Next step |
|---|---|---|---|---|
| PLANET | MGB-LA20 | APT1SB131520K | PLANET 1000BASE-BX SFP transceiver, TX 1310 nm/RX 1550 nm, 20 km over single-mode fiber, simplex LC/UPC, with DDM. MGB-Series 1000BASE-SX/LX SFP TransceiverReviewed 2026-08-17 | Specification matchDiscuss this specification |
| PLANET | MGB-TLA20 | APT1SB131520K | PLANET industrial 1000BASE-BX SFP transceiver, TX 1310 nm/RX 1550 nm, 20 km over single-mode fiber, simplex LC/UPC, with DDM. MGB-Series 1000BASE-SX/LX SFP TransceiverReviewed 2026-08-17 | Specification matchDiscuss this specification |
| TRANSITION NETWORKS | TN-SFP-LXB21 | APT1SB131520K | Transition Networks Gigabit Ethernet BiDi SFP transceiver, TX 1310 nm/RX 1550 nm, 20 km over single-mode fiber, simplex LC, with DMI. TN-SFP-LXB-61/62 Single Fiber SFP Data SheetReviewed 2026-08-17 | Specification matchDiscuss this specification |
| H3C | SFP-GE-LH20-SM1310-BIDI | APT1SB131520K | H3C Gigabit BiDi SFP transceiver, TX 1310 nm/RX 1550 nm, 20 km over single-mode fiber, LC connector. H3C Transceiver Modules User GuideReviewed 2026-08-17 | Specification matchDiscuss this specification |
| ZYXEL | SFP-BX1310-E | APT1SB131520K | Zyxel Gigabit BiDi SFP transceiver, TX 1310 nm/RX 1550 nm, 20 km over single-mode fiber, single LC, with DDMI. GS1900 Series Data SheetReviewed 2026-08-17 | Specification matchDiscuss this specification |
Compatibility matching
Compatible with a wide range of major network brands.
Send the host device brand, model and link requirements so we can match an appropriate option.Product datasheets
Review the document for the exact model.
Review the document for the exact model and reach before approving a sample or rollout.
Applications
Review where this product fits the link design.
Confirm the host port, fibre or cable path, distance and operating environment before selecting the final variant.
- Endpoint fitHost device, port role and remote-end interface
- Link fitRate, reach, wavelength, fibre and connector
- Project fitEnvironment, quantity and document requirements
Testing evidence
Request evidence against the exact product scope.
Available evidence depends on the model and agreed review scope. Ask for the checks needed by engineering or procurement before approving a sample or rollout.
- Product identityModel, label, connector and wavelength details
- Host contextCoding or recognition evidence where applicable
- Output evidenceOptical, diagnostic or link information where available
Related questions
Five answers for this product path.
Product selectionHow can I identify the correct form factor?
Check the device manual and the marking on the existing module or cable. SFP, SFP+, SFP28, QSFP+, QSFP28, QSFP-DD and OSFP are not interchangeable merely because their connectors look similar.
Browse productsCompatibility & codingWill DOM or DDM readings be available on the host?
They are available only when the module, interface and host software support the diagnostic functions and expose them correctly. Confirm the required readings as part of the device review.
Start a model reviewOptical link designDo both ends need the same wavelength?
Duplex links normally use matching interface wavelengths at both ends. BiDi and wavelength-division links use planned complementary or channel-specific wavelengths, so the exact link architecture matters.
Use the selection guideHigh-speed deploymentHow should I compare QSFP-DD and OSFP for 400G?
Start with the host port and supported interface list. The form factors have different mechanical and thermal characteristics and should not be treated as direct substitutes without device support.
Plan a technical reviewDocuments & procurementHow do I make sure a document applies to my exact model?
Compare the model reference, interface, reach and variant with your product shortlist. If the document is not published or the revision is unclear, send the model and required document type through the document request form before using it for approval.
Request a document pack