DS-SFP-FC4G-LW: Cisco 4G Fibre Channel Longwave SFP Transceiver Module (SMF, 1310nm, 10km)
MPN: DS-SFP-FC4G-LW|By: Cisco

Starting from
$100
Indicative. Final pricing is confirmed with your quote.
In Stockships worldwide
- Condition:
- New (authorized channel)
- Warranty:
- Full manufacturer warranty
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Bulk order? Request volume pricing
Authorized & warrantied
Sourced through authorized distribution, with the full manufacturer warranty.
Compatibility checked
Validated against your server platform before dispatch.
Delivery & lead time
Confirmed with your quote, including expedited freight where available.
Business & public sector
POs, net terms and volume pricing for qualified organizations, government and edu.
Product overview
The Cisco 4G fibre channel longwave SFP Transceiver Module (SMF, 1310nm, 10km) is supplied under part number DS-SFP-FC4G-LW. Direct-attach copper is cheaper and lower latency than optics but is limited by length and by what each switch will accept. Tell us the two endpoints and we will say which of the two is right for the run.
Quote requests are answered within 48 business hours, with availability confirmed before you raise a purchase order rather than after.
Specifications
General
- Manufacturer part number
- DS-SFP-FC4G-LW
- Product Type
- Transceivers & Cables
- Manufacturer
- Cisco
Interfaces & connectivity
- Drive Interface
- Fibre Channel
The table below is what the transceiver is documented as, not what we have inferred from the part number. If the figure you need is missing, ask and we will source it from the manufacturer.
Where the Cisco DS-SFP-FC4G-LW is deployed
- Like-for-like replacement of DS-SFP-FC4G-LW in an existing system
- Replacing an optic that has started erroring
- Holding spare optics against a link-level SLA
Who this part is for
- Network teams matching optics at both ends of an existing link
- Integrators supplying the passive layer with a switch order
- MSPs holding spare optics against a customer SLA
What you get ordering this from us
Ordered by part number
DS-SFP-FC4G-LW is what is quoted and DS-SFP-FC4G-LW is what ships; where an alternate code is genuinely the same part we name it rather than swap it silently.
Answered by a human
A quote comes back with the reasoning attached, including the cases where we think you should buy something else.
Coded for both ends
Tell us the switch at each end and we confirm the vendor coding before dispatch rather than after a link fails to come up.
Questions buyers ask about this part
Is DS-SFP-FC4G-LW genuine and is the warranty intact?
Yes. It ships new in Cisco packaging, which is what keeps the warranty and the firmware entitlement valid. Anything we cannot supply that way we tell you about before you order.
Will DS-SFP-FC4G-LW work in my server?
Tell us the switch at both ends of the link. Optics are frequently vendor-coded, so a module that is electrically correct can still refuse to come up; we confirm the coding for both ends before it ships.
Do you accept purchase orders and quote at volume?
Yes. We quote against a purchase order and hold the price for the quote period, with tiered rates at quantity. Net terms are available once the account is approved.
Compare other Transceivers & Cables we stock
| Model | Brand | Key spec | Availability | From |
|---|---|---|---|---|
| 10G SFP+ SR 850nm 300m Optical Transceiver Module | NVIDIA Networking | Speed: 10Gb/s | In Stock | $40 |
| Arista 1G SFP SX 850nm Optical Transceiver Module | Arista | Speed: 1Gb/s | In Stock | $50 |
| Juniper 1G SFP SX 850nm Optical Transceiver Module | Juniper | Speed: 1Gb/s | In Stock | $50 |
| HPE 1G SFP SX 850nm Optical Transceiver Module | HPE | Speed: 1Gb/s | In Stock | $50 |
| Dell Technologies 1G SFP SX 850nm Optical Transceiver Module | Dell Technologies | Speed: 1Gb/s | In Stock | $50 |
| Intel 1G SFP SX 850nm Optical Transceiver Module | Intel | Speed: 1Gb/s | In Stock | $45 |
Browse all Transceivers & Cables or everything we stock from Cisco.
Specifying a system, not just the part?
Optics and cabling are part of the fabric spec on a cluster build, since both ends and the switch have to agree.
