Arista SFP-25G-LR Compatible Dual-Rate 10/25GBASE-LR SFP28

EdgeOptic's SFP-25G-LR compatible is an Arista-coded dual-rate 10G/25G LR SFP28 transceiver and the Arista-coded variant of the EdgeOptic 25G-SFP28-10 multi-vendor 25GBASE-LR catalog. The optic carries 10 Gigabit Ethernet (10.31 Gbps) and 25 Gigabit Ethernet (25.78 Gbps) over a single G.652 SMF pair at 1310 nm, terminated with a duplex LC/UPC connector. The same hardware drops into Arista 7050X, 7060X, and 7280R series 25G SFP28 cages with Arista-recognized vendor identity, so the optic registers under its Arista identity without requiring the third-party-transceiver override commands that uncoded optics typically need; verify against the Arista Transceiver Compatibility Guide for the specific platform and EOS version.

The transmitter is a DML driving the 1310 nm LC duplex; the receiver is a PIN photodiode. Optical specifications: TX output power −7 to +2 dBm, RX sensitivity −12 dBm, RX overload +3 dBm, minimum extinction ratio 3.5 dB, and a 5 dB optical link budget over the 10 km specified reach on G.652 SMF. Real reach on a long link is loss-limited by installed fiber attenuation, splice loss, and connector loss, so on spans above 8 km calculate end-to-end insertion loss against the 5 dB budget rather than the nominal 10 km figure. The module operates 0 to 70 °C on a +3.3 V single supply with 1.2 W maximum power consumption.

At 25G operation the host MAC performs RS(528,514) RS-FEC; the module itself has no built-in FEC. Arista EOS disables FEC by default for 25GBASE-LR optics, so 25G LR links typically come up with FEC off on both sides. The FEC profile must match on both link partners, and a mismatch produces link-down events that do not surface as optical errors. Confirm the EOS FEC profile per interface on both ends before commissioning. At 10G operation the optic behaves as a standard 10GBASE-LR module and host-side FEC is not required, but the host port must support dual-rate selection between 10G and 25G on its SFP28 cage. DDM diagnostics report TX power, RX power, module temperature, laser bias, and supply voltage per SFF-8472 and surface through standard EOS show transceiver commands.

The module ships with Arista-recognized EEPROM coding so the optic registers cleanly under EOS on its vendor identity. Typical applications: data center 25G leaf-spine aggregation, campus 25G uplinks, and metro 25G long-reach connections. Platform support spans the Arista 7050X, 7060X, and 7280R series 25G SFP28 cages; verify the specific platform, line card, and EOS version against the Arista Transceiver Compatibility Guide before ordering, because per-platform support coverage changes across EOS releases. Conforms to IEEE 802.3cc, SFF-8431, SFF-8432, SFF-8472, and the SFP28 MSA.

Compliance: CE, Class 1 FDA and IEC 60825-1 laser safety, RoHS. Ships next business day from EU stock with a lifetime warranty. Backed by 15+ years of EdgeOptic compatibility engineering across vendor optical platforms. For volume pricing, custom EEPROM coding, or compatibility verification on a specific Arista platform, contact our sales team.