Chelsio SM25G-LR Compatible 25GBASE-LR SFP28 10km Transceiver
Chelsio compatible SM25G-LR - Key Features
- Compatibility: Chelsio
- Media Type: Single-Mode Fiber (SMF)
- Fiber Count: Duplex
- Connector: Double LC/UPC
- Maximum Distance: 10 km
- Average Link Budget: 5 dB
- Tx Wavelength: 1310 nm
- Supported Data Rate: 8.5 Gbps - 25.78 Gbps
- DDM/DOM: Supported
- Forward Error Correction (FEC): Host FEC Supported
- Temperature Range: Standard 0°-70°C
Chelsio SM25G-LR Price
In Stock - Ships Next Business DayChelsio compatible SM25G-LR Specifications
Form Factor | SFP28 |
Media Type | Single-Mode Fiber (SMF) |
Fiber Count | Duplex |
Connector | Double LC/UPC |
Maximum Distance | 10 km |
Average Link Budget | 5 dB |
TX Wavelength | 1310 nm |
RX Wavelength | 1310 nm |
Supported Data Rate | 8.5 Gbps - 25.78 Gbps |
Supported Ethernet Applications | 10G Ethernet (10.31Gbps), 25G Ethernet (25.78Gbps) |
DDM/DOM | Supported |
Forward Error Correction (FEC) | Host FEC Supported |
Transmitter Type | DML Laser |
Average Launch Power (Min) Each Lane | -7 dBm |
Average Launch Power (Max) Each Lane | 2 dBm |
Extinction Ratio (Min) | 3.5 dB |
Receiver Type | PIN photodiode |
Rx Wavelength Bandwidth | 40 nm |
Average Receiver Sensitivity (Min) Each Lane | -12 dBm |
Average Receiver Sensitivity (Max) Each Lane | 2 dBm |
Receiver Overload | 3 dBm |
Temperature Range | Standard 0°-70°C |
Storage Temperature | -40° to 85°C |
Relative Humidity | 5 to 85% |
Power Consumption (Max) | 1.2 W |
Power | +3.3V single power supply |
Compliance | CE, Class 1 FDA and IEC60825-1 Laser Safety Compliant, RoHS, SFF-8431, SFF-8472, IEEE 802.3cc, SFF-8432, SFP28 MSA |
Chelsio compatible SM25G-LR Datasheet
v4Complete technical specifications and product details
Chelsio compatible SM25G-LR Description
EdgeOptic's SM25G-LR compatible is a Chelsio-coded version of the EdgeOptic 25G-SFP28-10 multi-vendor 25GBASE-LR transceiver. It carries the EEPROM data a Chelsio adapter expects from a SM25G-LR module, so the host reads the optic as a recognized part. Chelsio catalogs the SM25G-LR as the 25 Gigabit long-reach SFP28 module for its Unified Wire adapters, and the EdgeOptic compatible matches that optical specification for the same single-mode 10 km application.
The module transmits and receives at 1310 nm over duplex single-mode fiber with a pair of LC connectors, reaching 10 km. It operates at either 10G Ethernet (10.31 Gbps) or 25G Ethernet (25.78 Gbps) per IEEE 802.3cc, so one part number covers both rate classes. Launch power ranges from a minimum of −7 dBm to a maximum of +2 dBm, receiver sensitivity is rated at −12 dBm, and receiver overload sits at +3 dBm. The 5 dB average link budget covers the loss of a standard 10 km single-mode span with margin for connectors and splices.
Maximum power draw is 1.2 W, and the module runs across a 0 to 70 °C commercial temperature range. Digital optical monitoring per SFF-8472 reports temperature, supply voltage, laser bias, and transmit and receive optical power, which feeds the diagnostics a Chelsio adapter exposes for the link. The optic has no built-in FEC; on 25G links, RS-FEC is handled by the host port per IEEE 802.3cc.
The compatible matches the SFP28 MSA along with SFF-8431, SFF-8432, and SFF-8472, and carries CE and RoHS marking with Class 1 laser safety. It works in Chelsio T6-based Unified Wire adapters that provide a 25G SFP28 cage. Confirm the fiber plant is single-mode end to end, since this LR optic will not link over multimode fiber. The same EdgeOptic 25G-SFP28-10 transceiver is available under multiple vendor codes, which keeps one spare valid across a mixed-vendor estate.
Backed by 15+ years of EdgeOptic compatibility engineering across vendor optical platforms, the SM25G-LR compatible ships next business day from EU stock with a lifetime warranty. For volume pricing or help confirming the fit against a specific Chelsio adapter model, contact our sales team.
Frequently Asked Questions
Does the SM25G-LR compatible work with Chelsio T6 Unified Wire adapters?
The EdgeOptic SM25G-LR compatible meets the SFP28 MSA and IEEE 802.3cc, the same optical and interface specification Chelsio publishes for the SM25G-LR used with its T6-based Unified Wire adapters, and it is coded to the SM25G-LR EEPROM profile. Chelsio offers its own branded transceivers for the T6 adapter family; verify the support policy for the specific adapter model before deploying a third-party module on a production system. To confirm the compatible against a particular Chelsio T6 adapter before ordering, contact our sales team.