Dell 407-BBXU Compatible 25GBASE-SR SFP28 Transceiver (No-FEC)

EdgeOptic's 407-BBXU compatible is a Dell-coded version of the EdgeOptic 25G-SFP28-100 multi-vendor 25GBASE-SR SFP28 transceiver, built for Dell PowerSwitch S-series top-of-rack switches and N-series aggregation platforms. The module matches Dell's original 407-BBXU specification, officially listed by Dell as the Transceiver, 25GbE SFP28 SR, No FEC, MMF, Duplex LC accessory for commercial-temperature deployments.

Optical specifications follow the 25GBASE-SR PMD: 850 nm VCSEL transmitter, PIN photodiode receiver, TX optical power −5 to +2.4 dBm, RX sensitivity better than −10.3 dBm, 5.3 dB link budget. Reach is 100 m on OM4, 100 m on OM5, and 70 m on OM3 multimode fiber with an LC/UPC duplex connector. Electrical interface follows SFF-8431 and SFF-8432 for the SFP28 cage, and DDM is SFF-8472 compliant across temperature, supply voltage, TX bias, TX power, and RX power. Power draw is 0.3 W typical across the 0 to 70 C commercial range.

The 407-BBXU is Dell's No-FEC SFP28 variant. The module is coded so the host port does not negotiate RS-FEC through the module identity. This matters operationally because Dell SmartFabric OS10 defaults 25G SFP28 ports to RS-FEC per IEEE 802.3by Clause 91 on the PowerSwitch S5200 family. When a No-FEC module is installed against an RS-FEC port default, the link stays down until the port FEC setting is changed on the interface (the exact OS10 token varies by release; consult the Dell SmartFabric OS10 User Guide for the current FEC configuration command for 25G ports), or the far-end module and host are re-aligned to No-FEC. EdgeOptic's 407-BBXU compatible carries the Dell No-FEC EEPROM profile so OS10 inventory reports the module as the genuine 407-BBXU SKU.

Platform fit covers the Dell PowerSwitch lines listed on the Dell 407-BBXU product page: N2200-ON, N3200-ON, S5212F-ON, S5224F-ON, S5232F-ON, S5248F-ON, and S5296F-ON. The S5200 series is Dell's primary 25G SFP28 top-of-rack line and the N-series covers campus and branch aggregation. Works on Dell PowerEdge servers with 25G SFP28 NIC adapter cards where the Dell server compatibility matrix lists the 407-BBXU for that adapter and PowerEdge model; verify against the Dell PowerEdge transceiver compatibility guide for your specific server and NIC combination before procurement.

Backed by 15+ years of EdgeOptic compatibility engineering across vendor optical platforms. Ships next business day from EU stock with a lifetime warranty. When ordering for mixed FEC and No-FEC deployments, keep the 407-BBXU reserved for ports configured with FEC disabled, and check the Dell SFP28 transceiver catalog for the RS-FEC-coded Dell sibling SKUs when the port profile calls for Clause 91. For bulk PowerSwitch and PowerEdge builds, contact our sales team.