Juniper 25GBASE-LR SFP28 Transceiver — 10km Single-Mode Fiber

The Juniper SFP-25G-LR-C is a 25GBASE-LR SFP28 optical transceiver delivering 25GbE over single-mode fiber up to 10km at 1310nm via duplex LC connector — Juniper-coded in alphanumeric part number format for Juniper QFX, MX, and PTX platforms, functionally equivalent to the 740-071562 numeric variant.

Key Features

• 25GBASE-LR SFP28 for 10km 25GbE over single-mode fiber at 1310nm
• Juniper alphanumeric coded part (SFP-25G-LR-C) — same performance as 740-071562
• Duplex LC connector for standard OS1/OS2 SMF patch panel compatibility
• DDM/DOM support for real-time optical monitoring via Junos OS
• Low-power SFP28 for high-density 25G SMF deployments in Juniper chassis

Product Specifications

• Part Number: SFP-25G-LR-C
• Manufacturer: Juniper Networks
• Form Factor: SFP28
• Speed: 25GbE (25GBASE-LR)
• Wavelength: 1310nm
• Connector: Duplex LC
• Fiber Type: Single-Mode Fiber (SMF, OS1/OS2)

Transceiver & Interface Specifications

• Max Distance: 10km over OS1/OS2 SMF
• TX Power: -8.2 to +0.5 dBm
• RX Sensitivity: -18.4 dBm (min)
• Power Consumption: Typically 1.0W
• DDM/DOM: Yes (Digital Diagnostics Monitoring)
• Operating Temperature: 0°C to 70°C (commercial)

Use Cases

• 25GbE server-to-switch SMF uplinks in Juniper QFX data center deployments
• Inter-switch 25G SMF links in Juniper spine-leaf architectures over OS1/OS2 fiber
• Campus 25GbE inter-building links using existing single-mode fiber infrastructure
• Replacing or expanding 25G SMF optics in Juniper MX or PTX service provider platforms

Compatibility

• Compatible with Juniper QFX, MX, and PTX platforms with SFP28 25G ports
• Requires OS1/OS2 single-mode fiber with duplex LC connectors
• IEEE 802.3cc 25GBASE-LR compliant
• Functionally interchangeable with 740-071562 on supported Juniper platforms

Frequently Asked Questions

What is the -C suffix in SFP-25G-LR-C?

The -C suffix in Juniper's alphanumeric optic part numbers typically denotes the Juniper-coded commercial temperature (0°C to 70°C) variant. It distinguishes the standard commercial-temp coded optic from extended- or industrial-temperature variants and from third-party or OEM-coded alternatives.

Is the SFP-25G-LR-C interchangeable with 740-071562 in the same Juniper switch?

Yes — both are Juniper-genuine 25GBASE-LR SFP28 modules with identical optical specifications. The alphanumeric (SFP-25G-LR-C) and numeric (740-071562) part numbers refer to the same transceiver capability and are fully interchangeable on supported Juniper platforms.

What is the minimum fiber quality required for 10km reach with the SFP-25G-LR-C?

The SFP-25G-LR-C requires OS1 or OS2 single-mode fiber for reliable 10km operation. Total link loss including connectors, splices, and fiber attenuation must remain within the transceiver's power budget (TX power minus RX sensitivity). Clean APC or UPC connectors are recommended to minimize return loss.

The Juniper SFP-25G-LR-C provides Juniper-coded 25GBASE-LR SFP28 connectivity over 10km SMF in the alphanumeric part number format preferred by many Juniper ordering systems — delivering the same optical performance, DDM monitoring, and platform compatibility as the 740-071562 numeric variant for 25G single-mode fiber deployments across Juniper QFX, MX, and PTX environments.