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FN-TRAN-SFP28-SR: Fortinet 25GBASE-SR SFP28 Optical Transceiver Module

Fortinet FN-TRAN-SFP28-SR Transceiver25GbESFP28
FortinetTransceivers

Also listed as: SP-FG-25GE-SR, FG-TRAN-SFP28-SR

The Fortinet FN-TRAN-SFP28-SR is a 25GBASE-SR SFP28 optical transceiver delivering 25 Gigabit Ethernet up to 100 meters over OM4 multimode fibre for high-end FortiGate firewalls.

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Specifications

Part numberFN-TRAN-SFP28-SR
BrandFortinet
TypeTransceivers
Other numbersSP-FG-25GE-SR, FG-TRAN-SFP28-SR
Statuscurrent
Form factorSFP28
Speed25GbE
Wavelength nm850
ConnectorLC duplex
Cable typeMultimode Fibre
Max distance m100

About the FN-TRAN-SFP28-SR

The Fortinet FN-TRAN-SFP28-SR optical transceiver delivers 25 Gigabit Ethernet transmission for enterprise data center firewalls and high throughput cloud interconnects. Transmitting over 850 nanometer multimode optical fibre up to 100 meters on OM4, it provides 2.5 times the bandwidth of 10GbE links using the compact SFP form factor.

Compatibility

Compatible with Fortinet FortiGate 1800F, 2600F, 3000D, 3200D, 3400E, 4200F, and 4400F firewalls equipped with SFP28 interfaces. It operates under FortiOS with automated transceiver identification and continuous digital diagnostic telemetry reporting.

How to identify a genuine unit

Enclosed in an SFP28 metal casing featuring an orange or black extraction latch bail indicating short-reach multimode optics. The manufacturer label identifies the component as FN-TRAN-SFP28-SR with Fortinet branding, individual serial number barcode, and laser safety warnings.

Buying used

Inspect the optical bore with a fiber microscope to verify clean optical surfaces. Test the module in a 25GbE firewall port with FEC enabled to confirm error-free packet reception, stable optical link synchronization, and proper digital optical monitoring telemetry.

Fits these models

Works together

How the Fortinet FN-TRAN-SFP28-SR connects to servers, storage and the network: 3 ways, with the hardware on each path.

iSCSI and NVMe/TCP over EthernetFile storage (NFS and SMB)Hyperconverged cluster

iSCSI and NVMe/TCP over Ethernet

Keep the speed the same at all three points: a 25GbE server, a 25GbE switch port and a 25GbE array port. Mixed speeds work but the slowest link sets the pace.

Adapters for the server

Switches

Storage

iSCSI and NVMe/TCP over Ethernet: how it fits together

File storage (NFS and SMB)

Front-end ports face the clients; back-end ports (on scale-out systems) connect the nodes to each other and need their own switch pair.

Adapters for the server

Switches

Storage

File storage (NFS and SMB): how it fits together

Hyperconverged cluster

Plan at least two 25GbE ports per node to two switches; all-NVMe clusters often move to 100GbE.

HCI nodes

Adapters for the server

Switches

Hyperconverged cluster: how it fits together

Plan and size it

Check compatibility with Fortinet

Before you buy, confirm the exact configuration against the vendor's own lists: firmware levels, operating systems, adapters and optics that Fortinet has tested with the Fortinet FN-TRAN-SFP28-SR.

FAQ

What is the maximum optical reach of FN-TRAN-SFP28-SR?

It supports links up to 70 meters on OM3 multimode fibre and 100 meters on OM4 multimode fibre.

Does this transceiver require Forward Error Correction?

Yes, host interfaces must enable IEEE 802.3by RS-FEC to achieve the specified bit error rate.

Buying or selling FN-TRAN-SFP28-SR?

New, refurbished or used. Tell us the quantity and condition and we connect you with a vetted reseller in your region, usually within one working day.

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