FTLF8540P4BCL — Finisar 25GBASE-SR SFP28 Transceiver Module (MMF, 850nm)
MPN: FTLF8540P4BCL|By: Finisar

Starting from
$565
Indicative — final pricing confirmed with your quote.
In Stockships worldwide
- Condition:
- New — authorized channel
- Warranty:
- Full manufacturer warranty
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Bulk order? Request volume pricing
Product overview
Part number FTLF8540P4BCL identifies this Finisar 25GBASE-SR SFP28 Transceiver Module (MMF, 850nm). 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.
Featuring
- Optical Standard
- 25GBASE-SR
- Manufacturer
- Finisar
Physical characteristics
- Transceiver Type
- SR
- 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 4 facts we can state about FTLF8540P4BCL without inferring anything. Compatibility beyond this is confirmed per platform, on request, before you order.
Where the Finisar FTLF8540P4BCL is deployed
- Swapping out a failed transceiver for FTLF8540P4BCL under change control
- Replacing an optic that has started erroring
- Bringing up a new link between two existing switches
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
- Data centre teams cabling a new rack to an installed fabric
What you get ordering this from us
Ordered by part number
The order is placed against FTLF8540P4BCL, not against a description of it, so there is no room for a substitution you did not agree to.
Compatibility checked
We confirm the part is supported on your platform before it ships, rather than leaving the check to you.
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 FTLF8540P4BCL genuine and is the warranty intact?
- Yes — new and sealed, with the Finisar warranty and the firmware update path intact. We do not sell refurbished stock as new, and we do not source grey-market units.
- Will FTLF8540P4BCL 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.
