100% Traffic Tested 25G SFP28 SR 100m Optical Transceiver — FOT Fiber Optic

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25G SFP28 SR 100m Optical Transceiver

Name: 25G SFP28 SR 100m Optical Transceiver
Brand: FOT Fiber Optic
SKU: FOT-TR-25G-S28-SR
Availability: InStock

SKU: FOT-TR-25G-S28-SR · 25G / 32G · SFP28

25–32 Gb/s SR in SFP28 — 850 nm VCSEL, 70 m OM3 / 100 m OM4 over OM3 / OM4 multimode. Vendor-coded and traffic-tested on a live switch before shipment.

25–32 Gb/s1 × 25G NRZ
70 m OM3 / 100 m OM4Max reach
850 nm VCSELWavelength
≤ 1 WMax power

Coding

Generic / MSANVIDIA / MellanoxCiscoAristaJuniperHuaweiHPEDellExtreme

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Ships worldwide

Free qualification samples

3-year warranty

Product Overview

The standard server-access optic of the 25G generation and the endpoint for every 100G 4×25G breakout.

Built to IEEE 802.3by 25GBASE-SR, this module presents a Duplex LC optical interface and runs over OM3 / OM4 multimode. Every unit is programmed to your platform's vendor coding, powered up on a live switch and traffic-tested end-to-end before it is packed — so it links up on first insertion rather than throwing an “unsupported transceiver” message at 2 a.m.

Full DDM/DOM telemetry is implemented, so per-lane transmit and receive power, laser bias and case temperature are readable live from your NOS. Modules are serialized, individually bagged with dust caps, and covered by a 3-year warranty. OEM/ODM labelling and custom EEPROM profiles are available on request.

Compatible Part Number Cross-Reference

Platform vendor	Equivalent OEM part number
Cisco	SFP-25G-SR-S
Arista	SFP-25G-SR

How to read this table. 25G SFP28 SR 100m Optical Transceiver is an FOT-manufactured module built to IEEE 802.3by 25GBASE-SR. The part numbers above identify the OEM optics it is designed to function in place of; they are listed for compatibility reference only and remain the trademarks of their respective owners. This is not an OEM-branded product. Send us your platform and software version and we programme and traffic-test to match it.

Technical Specifications

Optical & Electrical
Data Rate	25–32 Gb/s (1 × 25G NRZ)
Form Factor	SFP28
Module Type	SR
Wavelength	850 nm VCSEL
Maximum Reach	70 m OM3 / 100 m OM4
Fiber Type	OM3 / OM4 multimode
Optical Connector	Duplex LC
Power Consumption	≤ 1 W

Compliance & Management
Standard	IEEE 802.3by 25GBASE-SR
Management	CMIS / SFF-8636 as applicable to the form factor
DDM / DOM	Full real-time digital diagnostic monitoring
Hot Pluggable	Yes
RoHS	Compliant
Operating Temperature	0 °C to +70 °C (commercial); industrial grade on request
Warranty	3 years

Testing & Supply
Traffic Test	100% — every module linked on a live switch before shipment
BER Verification	Verified end-to-end per unit
Vendor Coding	Programmed to your platform at manufacture; mixed coding available
Traceability	Serialized; serial links to test record and production batch
Test Report	Available per order; sample reports supplied for tenders
Lead Time	Stock items ship in 2–3 days; coded builds 5–7 days
Sample Policy	Free samples available for qualification before volume orders

Ordering Information

Part Number	Configuration	Reach	Availability
FOT-TR-25G-S28-SR	SR	70 m OM3 / 100 m OM4	In stock
FOT-TR-25G-S28-SR-NVID	SR · coded for NVIDIA / Mellanox	70 m OM3 / 100 m OM4	Build to order
FOT-TR-25G-S28-SR-CISC	SR · coded for Cisco	70 m OM3 / 100 m OM4	Build to order
FOT-TR-25G-S28-SR-ARIS	SR · coded for Arista	70 m OM3 / 100 m OM4	Build to order
FOT-TR-25G-S28-SR-JUNI	SR · coded for Juniper	70 m OM3 / 100 m OM4	Build to order

Need a wavelength, channel or coding that is not listed? Custom builds ship in 5–7 days — note it on your RFQ.

Platform Compatibility

Every module is EEPROM-programmed at the factory to the vendor coding you specify, so the host recognises it natively — no “unsupported transceiver” warnings and no console workarounds. Mixed coding (a different vendor at each end) is available for inter-vendor links.

Generic / MSANVIDIA / MellanoxCiscoAristaJuniperHuaweiHPEDellExtreme

Quality & What's in the Box

100% Traffic Tested

Every module is linked on a live switch and BER-verified end-to-end before packing.

Serialized & Traceable

Serial number links to the test record, coding profile and production batch.

Free Samples

Qualify the module on your own platform before committing to a volume order.

Packaging

Individually bagged with dust caps and ESD protection, packed in export cartons.

Typical Applications

Data Center Spine & Leaf

High-radix switching fabrics where port density and power per bit decide the design.

AI / GPU Clusters

Rail-optimised accelerator fabrics running InfiniBand or RoCE at scale.

Metro & DCI

Campus backbone and data-centre interconnect over leased or owned dark fibre.

Enterprise & Storage

Core uplinks, SAN fabrics and aggregation for campus and enterprise networks.

Frequently Asked Questions

Is this compatible with SFP-25G-SR-S?

Yes. This is a third-party module built to the same IEEE 802.3by 25GBASE-SR specification and EEPROM-coded so the host reads it as a supported optic. It is offered as a functional equivalent to SFP-25G-SR-S, SFP-25G-SR — it is an FOT module, not an OEM-branded part. Tell us the exact switch model and software version on your RFQ and we code and traffic-test against that platform before shipping.

What reach will I actually get on OM3 / OM4 multimode?

This module is specified to 70 m OM3 / 100 m OM4. Real-world reach depends on your channel loss budget — every mated connector pair costs roughly 0.3 dB and every splice about 0.1 dB. Measure the installed channel rather than assuming the map distance, and keep 2–3 dB of margin for ageing and future repairs.

Does breakout need to be configured on the switch?

Yes. The optic and the cable are passive to that decision — the lane grouping is set in the switch OS, and on most platforms a port cannot be re-aggregated without a reload. Decide the breakout ratio before you cable, not after.

Can you code these for my switch vendor?

Yes. We program the EEPROM at manufacture for NVIDIA/Mellanox, Cisco, Arista, Juniper, Huawei, HPE, Dell, Extreme and generic MSA. Specify the platform on your RFQ; mixed coding (a different vendor at each end) is routine for inter-vendor links.

Do you supply test reports and samples?

Free samples are available so you can qualify the module in your own environment before committing to volume. Per-order test reports are supplied on request, and sample reports can be provided for tender documentation.

Related 25G / 32G Products

Request a quote for this part

Tell us the platform and the quantity. An engineer checks the part against your switch and software version before quoting — if it will not work, we say so.

Goes to our engineers and the quotation desk together. Replies come from sales@topnetsystem.com, usually within one working day.