25G BiDi SFP28 40km Industrial Transceiver (Side B): BIDI-25G-SFP28-40BI

EdgeOptic's BIDI-25G-SFP28-40BI is a multi-vendor-compatible industrial 25G BiDi SFP28 transceiver rated for −45°C to +85°C operation. It carries the downstream wavelength assignment for the industrial pair: 1310 nm TX, 1270 nm RX, single LC/UPC connector, 19 dB link budget over G.652 single-mode fiber. The matched far-end partner is BIDI-25G-SFP28-40AI, which transmits at 1270 nm and receives at 1310 nm to complete the bidirectional 40 km link on one fiber strand.

The optical front end uses a DML laser transmitter rated 0 to +6 dBm output power, with extinction ratio 3.5 dB minimum, and an APD receiver with minimum sensitivity of −19 dBm and overload of −5 dBm. Receive wavelength bandwidth is 20 nm. Maximum power consumption is 1.5 W on a +3.3 V supply. SFF-8472 digital diagnostics expose live readouts for TX power, RX power, temperature, supply voltage, and laser bias, which is particularly useful for remote outdoor sites where physical access is limited.

Dual-rate operation covers 10G Ethernet (10.3125 Gbps) and 25G Ethernet (25.78125 Gbps). CPRI Option 10 and eCPRI are supported for 5G fronthaul. Host-side RS-FEC is strongly recommended for 25G long-reach operation; the module supports host FEC and port FEC mode depends on the switch platform and OS configuration. Relative humidity range is 5 to 85 percent. The −45°C lower limit extends below the −40°C minimum defined as the standard industrial operating range in SFF-8431, providing extra cold-end margin for arctic-region and unconditioned-outdoor deployments.

Typical industrial-temperature deployments include outdoor 5G xHaul cabinets at unconditioned cell sites, smart-grid substation backbones and distribution feeder communications, railway trackside fiber for signaling and operational data, pipeline SCADA over long-distance fiber, and remote-site backhaul in regions where ambient temperature falls outside the standard 0 to +70 °C commercial range. The single-strand BiDi architecture halves fiber count for the same reach, which matters most where buried conduit, pole infrastructure, or pipeline right-of-way limits new pulls. CPRI Option 10 and eCPRI support carries 5G-NR fronthaul directly on the 25G optic at compact remote radio sites where rack space and power are constrained. The −45 °C to +85 °C operating window covers Nordic-climate cell sites and other outdoor enclosures without active heating, where module reliability across the full temperature span drives mean-time-to-repair more than peak performance does.

Compliance covers SFP28 MSA, SFF-8431, SFF-8432, SFF-8472, CE, RoHS, and Class 1 FDA + IEC 60825-1 laser safety. Multi-vendor coding is available so the module can be ordered to match the target switch or router platform. Industrial and commercial variants must not be cross-paired: this module's matched partner is BIDI-25G-SFP28-40AI, not the commercial BIDI-25G-SFP28-40A. Pairing 40BI with the commercial 40B would put two 1310 nm transmitters on the link and would not establish a working connection.

Backed by 15+ years of EdgeOptic compatibility engineering across vendor optical platforms. Made to order, 2-week lead time, lifetime warranty included. For platform-specific compatibility coding, extended-temperature deployment guidance, or volume pricing, contact our sales team.