Arista SFP-25G-MR-LR Compatible 10/25GBASE-LR SFP28 10 km

EdgeOptic's SFP-25G-MR-LR compatible is an Arista-coded multi-rate 10G/25G LR SFP28 transceiver and the Arista-coded variant of the EdgeOptic 25G-SFP28-10 multi-vendor 25GBASE-LR catalog. Arista catalogs SFP-25G-MR-LR as the Multi-Rate LR variant: the MR designation indicates the optic supports both 10G and 25G operation on the same module, so the same part can drop into an Arista 10G SFP+ port or a 25G SFP28 port, subject to the target EOS release and chassis support for multi-rate operation. This is the use case behind Arista's seamless 10G-to-25G migration story, where the same fiber and the same optic carry both rates as the host port is upgraded. The single-rate Arista LR counterpart is SFP-25G-LR, which is specified for 25G-only operation; verify per Arista's Transceiver Compatibility Guide. The module 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 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. The FEC mode must agree on both link partners or the link will negotiate down or fail to come up cleanly, so verify the per-interface FEC configuration on both ends before commissioning. At 10G operation the optic behaves as a standard 10GBASE-LR module and host-side FEC is not required; the host port must support dual-rate selection between 10G and 25G on its SFP28 cage, and 10G-only SFP+ cages can use the optic for 10G operation. DDM diagnostics report TX power, RX power, module temperature, laser bias, and supply voltage in real time per SFF-8472, which lets operators monitor link health across mixed 10G/25G deployments.

The module ships with Arista-recognized EEPROM coding for clean registration under EOS without a third-party-transceiver override. SFP-25G-MR-LR targets Arista switching platforms with 25G SFP28 cages and 10G SFP+ cages across the 7050X, 7060X, and 7280R product lines. Verify the specific Arista chassis, line card, and EOS release against Arista's Transceiver Compatibility Guide before ordering, because per-platform and per-EOS support coverage for multi-rate optics changes between releases. The 10G backward-compatibility mode in particular depends on EOS release support for multi-rate optic operation on the target port. 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 and EOS release, contact our sales team.