Dell 407-BBXU Compatible 25GBASE-SR SFP28 Transceiver (No-FEC)
Dell (Force10) compatible 407-BBXU - Key Features
- Compatibility: Dell (Force10)
- Media Type: Multi-Mode Fiber (MMF) -OM3/OM4/OM5
- Fiber Count: Duplex
- Connector: Double LC/UPC
- Maximum Distance: 100 m
- Average Link Budget: 5.3 dB
- Tx Wavelength: 850 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
Dell (Force10) 407-BBXU Price
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Form Factor | SFP28 |
Media Type | Multi-Mode Fiber (MMF) -OM3/OM4/OM5 |
Fiber Count | Duplex |
Connector | Double LC/UPC |
Maximum Distance | 100 m |
Average Link Budget | 5.3 dB |
TX Wavelength | 850 nm |
RX Wavelength | 850 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 | VSCEL Laser |
Average Launch Power (Min) Each Lane | -5 dBm |
Average Launch Power (Max) Each Lane | 2.4 dBm |
Extinction Ratio (Min) | 3 dB |
Receiver Type | PIN photodiode |
Rx Wavelength Bandwidth | 20 nm |
Average Receiver Sensitivity (Min) Each Lane | -10.3 dBm |
Average Receiver Sensitivity (Max) Each Lane | 2.4 dBm |
Receiver Overload | 2.4 dBm |
Temperature Range | Standard 0°-70°C |
Storage Temperature | -40° to 85°C |
Relative Humidity | 5 to 85% |
Power Consumption (Max) | 0.3 W |
Power | +3.3V single power supply |
Compliance | SFF-8432, CE, Class 1 FDA and IEC60825-1 Laser Safety Compliant, RoHS, SFF-8431, SFF-8472, SFP28 MSA |
Dell (Force10) compatible 407-BBXU Datasheet
v3Complete technical specifications and product details
Dell (Force10) compatible 407-BBXU Description
EdgeOptic's 407-BBXU compatible is a Dell-coded 25GBASE-SR SFP28 transceiver built for Dell PowerSwitch S-series top-of-rack switches and PowerEdge server SFP28 NICs. 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 specs follow the 25GBASE-SR PMD: 850 nm VCSEL transmitter, PIN photodiode receiver, TX power -8.4 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 across the 0 to 70 C commercial range.
The 407-BBXU is Dell's No-FEC SFP28 variant. In contrast to the extended-temperature 407-BCHI and the Intel-chipset 407-BCBF, the 407-BBXU is coded so that the host port does not negotiate RS-FEC through the module identity. This matters operationally because Dell OS10 defaults 25G SFP28 ports to Clause 91 RS-FEC 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 disabled on the interface (the exact OS10 token varies by release; consult the Dell OS10 Enterprise Edition 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 that OS10 inventory reports the module as the genuine 407-BBXU SKU.
Platform fit covers Dell PowerSwitch S5212F-ON, S5224F-ON, S5232F-ON, and S5248F-ON top-of-rack switches. The S5200 series is Dell's primary 25G SFP28 top-of-rack line. On the compute side, the same module is used in PowerEdge C4140, R640, R740, R840, R940, T440, and T640 chassis via the supported 25 GbE SFP28 adapter cards (Broadcom 57414, QLogic FastLinQ, and Mellanox/NVIDIA ConnectX families). EEPROM coding presents the expected Dell vendor identity, so OS10 and iDRAC inventory recognize the module without flagging third-party warnings on interface bring-up.
When ordering for mixed FEC/No-FEC deployments, keep the 407-BBXU reserved for ports configured with FEC off and reach for the RS-FEC-coded Dell sibling SKUs (407-BCHI, 407-BCBF) when the port profile calls for Clause 91. For bulk PowerSwitch or PowerEdge builds, contact our sales team.
Frequently Asked Questions
Why does a Dell 407-BBXU link stay down on a PowerSwitch S5248F-ON running OS10?
OS10 defaults 25G SFP28 ports to Clause 91 RS-FEC. The 407-BBXU is Dell's No-FEC SFP28 SKU, so the port FEC setting must be changed to match, or the module swapped for an RS-FEC variant, before the link negotiates. The fix is to disable RS-FEC on the interface on both ends of the link (the OS10 CLI token varies by release; refer to the Dell OS10 Enterprise Edition User Guide for the exact command for 25G port FEC configuration), with FEC profiles aligned between the two transceivers.
What is the difference between Dell 407-BBXU, 407-BCHI, and 407-BCBF?
407-BBXU is the standard 25 GbE SFP28 SR module at 0 to 70 C commercial temperature, coded No-FEC, targeted at Dell PowerSwitch S-series top-of-rack deployments. 407-BCHI is the extended-temperature (-40 to 85 C) dual-rate 10G/25G variant designed to cover all SFP28 port locations including PowerEdge server NICs. 407-BCBF is an Intel-chipset variant of the same physical SFP28 SR module at commercial temperature. FEC coding differs between the No-FEC and RS-FEC Dell SKUs, so host port configuration must match the chosen module.
Does OS10 require an 'unsupported transceiver' unlock command for the 407-BBXU compatible?
No. EdgeOptic's 407-BBXU compatible is programmed with Dell-recognized EEPROM and the 407-BBXU part identity, so OS10 inventory accepts the module as a supported Dell SFP28 transceiver without requiring the 'allow unsupported-transceiver' configuration knob on the interface.
Is the 407-BBXU a PowerSwitch-only module, or does it also fit PowerEdge server NICs?
Dell lists the 407-BBXU across both sides of the data center. On PowerSwitch, it qualifies for the S5200 series top-of-rack switches (S5212F-ON, S5224F-ON, S5232F-ON, S5248F-ON). The S5200 is Dell's primary 25G SFP28 TOR line. On PowerEdge compute, Dell qualifies the same module for SFP28 NICs in C4140, R640, R740, R840, R940, T440, and T640 servers. Port FEC configuration must match the module profile on the compute side as well.