100% Traffic Tested 800G QSFP112 2xSR4 Flat-Top Transceiver — FOT Fiber Optic

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800G QSFP112 2xSR4 Flat-Top Transceiver

Name: 800G QSFP112 2xSR4 Flat-Top Transceiver
Brand: FOT Fiber Optic
SKU: FOT-TR-800G-Q112-2SR4F
Availability: InStock

SKU: FOT-TR-800G-Q112-2SR4F · 800G · QSFP112 flat-top

800 Gb/s 2×SR4 in QSFP112 flat-top — 850 nm VCSEL, 60–100 m OM4 over OM3 / OM4 multimode. Vendor-coded and traffic-tested on a live switch before shipment.

800 Gb/s8 × 100G PAM4
60–100 m OM4Max reach
850 nm VCSELWavelength
≤ 15 WMax power

Coding

Generic / MSANVIDIA / MellanoxCiscoAristaJuniper

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Ships worldwide

Free qualification samples

3-year warranty

Product Overview

Flat-top QSFP112 variant for adapter cards and liquid-cooled cages.

Built to 2×400GBASE-SR4, this module presents a 2 × MPO-12/APC 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

Tell us the switch model and we will confirm the exact OEM part this replaces, then code and traffic-test the module against that platform before shipping.

Technical Specifications

Optical & Electrical
Data Rate	800 Gb/s (8 × 100G PAM4)
Form Factor	QSFP112 flat-top
Module Type	2×SR4
Wavelength	850 nm VCSEL
Maximum Reach	60–100 m OM4
Fiber Type	OM3 / OM4 multimode
Optical Connector	2 × MPO-12/APC
Power Consumption	≤ 15 W

Compliance & Management
Standard	2×400GBASE-SR4
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-800G-Q112-2SR4F	2×SR4	60–100 m OM4	In stock
FOT-TR-800G-Q112-2SR4F-NVID	2×SR4 · coded for NVIDIA / Mellanox	60–100 m OM4	Build to order
FOT-TR-800G-Q112-2SR4F-CISC	2×SR4 · coded for Cisco	60–100 m OM4	Build to order
FOT-TR-800G-Q112-2SR4F-ARIS	2×SR4 · coded for Arista	60–100 m OM4	Build to order
FOT-TR-800G-Q112-2SR4F-JUNI	2×SR4 · coded for Juniper	60–100 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

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

This module is specified to 60–100 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.

Which MPO polarity and polish do I need?

Single-mode parallel interfaces are APC (angled, green) and multimode are normally UPC. Polarity follows your cabling system convention — Type B is the usual choice for a straight port-to-port link. Our MPO polarity guide covers the whole scheme, and we can build trunks and harnesses to match.

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 800G 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.