FN-CBL-25G-SFP28-3M: Fortinet 25GbE SFP28 Direct Attach Copper Cable 3m
Also listed as: SP-CBL-25GSFP-3M, FG-CBL-25G-3M
The Fortinet FN-CBL-25G-SFP28-3M is a 3-meter passive SFP28 direct attach copper cable providing 25 Gigabit Ethernet inter-appliance and HA clustering connectivity.
Specifications
| Part number | FN-CBL-25G-SFP28-3M |
|---|---|
| Brand | Fortinet |
| Type | Cables |
| Other numbers | SP-CBL-25GSFP-3M, FG-CBL-25G-3M |
| Status | current |
| Form factor | SFP28 |
| Speed | 25GbE |
| Connector | SFP28 to SFP28 |
| Cable type | Twinaxial passive copper |
| Max distance m | 3 |
About the FN-CBL-25G-SFP28-3M
The Fortinet FN-CBL-25G-SFP28-3M direct attach copper cable assembly provides high performance 25 Gigabit Ethernet connectivity for intra-rack firewall clusters and high bandwidth network uplinks. Containing shielded twinaxial wire pairs supporting 25Gbps line rate, it provides an economical low latency solution for short-reach inter-appliance links.
Compatibility
Compatible with Fortinet FortiGate 1800F, 2600F, 3000D, 3200D, 3400E, 4200F, and 4400F firewalls equipped with SFP28 ports. It links enterprise firewalls to data center leaf switches and bridges redundant HA pairs without optical transceiver overhead.
How to identify a genuine unit
Constructed with a heavy gauge black twinaxial cable jacket and durable metal SFP28 connector housings. Both connector ends feature an integrated pull tab release latch and an adhesive identification label displaying Fortinet part number FN-CBL-25G-SFP28-3M and serial number.
Buying used
Inspect the cable outer insulation for pinch points or sharp bends that could impair differential pair signal integrity. Verify that connector latching springs engage securely into firewall cages and check that FortiOS establishes link state immediately without reporting bit errors.
Fits these models
- Fortinet FortiGate 1800F
- Fortinet FortiGate 2600F
- Fortinet FortiGate 3000D
- Fortinet FortiGate 3200D
- Fortinet FortiGate 3300E
- Fortinet FortiGate 3400E
- Fortinet FortiGate 3600E
- Fortinet FortiGate 3700D
- Fortinet FortiGate 3800D
- Fortinet FortiGate 3960E
- Fortinet FortiGate 4200F
- Fortinet FortiGate 4400F
- Fortinet FortiGate 4800F
- Fortinet FortiGate 6000F
- Fortinet FortiGate 7000E
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-CBL-25G-SFP28-3M.
- Specifications Fortinet Document Library (hardware guides and transceiver support)
- Support Fortinet Support
FAQ
What is the physical length of the cable?
It is exactly 3 meters in total length.
Can it be used for FortiGate High Availability clustering?
Yes, it is widely used for dedicated 25Gbps HA heartbeat and session synchronization links.
Buying or selling FN-CBL-25G-SFP28-3M?
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.
Sources
- Fortinet Optical Transceivers Data Sheet, checked 2026-10-27