QDD-400G-FR4-S — Cisco 400GBASE-FR4 QSFP-DD Transceiver Module (SMF, 1310nm, 2km, Duplex LC)
MPN: QDD-400G-FR4-S|By: Cisco
Starting from
$3,190
Indicative — final pricing confirmed with your quote.
In Stockships worldwide
- Condition:
- New — authorized channel
- Warranty:
- Full manufacturer warranty
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Product overview
The Cisco 400GBASE-FR4 QSFP-DD Transceiver Module (SMF, 1310nm, 2km, duplex LC) is supplied under part number QDD-400G-FR4-S. 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.
We return an itemised quote within 48 business hours, and we say plainly when a part is constrained rather than quoting a date we cannot hold.
Featuring
- Manufacturer
- Cisco
Interfaces / Ports
- Connector
- LC
Physical characteristics
- Product Type
- Transceivers & Cables
- Expedited shipping options are available — rates confirmed with your quote.
- Purchase orders accepted from qualified institutions.
- Compatibility is validated against your server platform before dispatch. Send us the model and we will confirm support.
These are the 3 facts we can state about QDD-400G-FR4-S without inferring anything. Compatibility beyond this is confirmed per platform, on request, before you order.
Where the Cisco QDD-400G-FR4-S is deployed
- Sourcing QDD-400G-FR4-S against a build sheet that names it explicitly
- Replacing an optic that has started erroring
- Holding spare optics against a link-level SLA
Who this part is for
- Procurement buying optics in quantity for a scheduled build
- MSPs holding spare optics against a customer SLA
- Network teams matching optics at both ends of an existing link
What you get ordering this from us
Ordered by part number
QDD-400G-FR4-S is what is quoted and QDD-400G-FR4-S 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 QDD-400G-FR4-S genuine and is the warranty intact?
- Yes. Supplied new and unopened, so the manufacturer warranty and firmware update path stay supported. No grey-market stock and no refurbished units sold as new.
- Will QDD-400G-FR4-S 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.
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Specifying a system, not just the part?
Optics and cabling are part of the fabric spec on a cluster build — both ends and the switch have to agree.