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7G17A03537: lenovo ThinkSystem 25Gb SFP28 SR Optical Transceiver

lenovo 7G17A03537 Transceiver25GbE SFP28SFP28
lenovoTransceivers25GbE SFP28

Also listed as: 7G17A03537-01, 01KN517, SP47A03537, AV1B, AFBR-725SMZ-LN

25GBASE-SR short-reach optical SFP28 transceiver module providing 25GbE optical connectivity for ThinkSystem network adapters.

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Specifications

Part number7G17A03537
Brandlenovo
TypeTransceivers
Other numbers7G17A03537-01, 01KN517, SP47A03537, AV1B, AFBR-725SMZ-LN
Interface25GbE SFP28
Wavelength nm850
Max distance m100
ConnectorLC Duplex
Form factorSFP28

About the 7G17A03537

The Lenovo 7G17A03537 is a 25GBASE-SR short-reach optical SFP28 transceiver module engineered for Lenovo ThinkSystem 25Gb Ethernet network adapters. Operating at an 850nm wavelength over multimode fiber, it delivers 25Gbps line rate performance over distances up to 70 meters on OM3 and 100 meters on OM4 fiber, providing high-bandwidth uplinks for virtualization, storage replication, and container clusters.

Compatibility

Compatible with all Lenovo ThinkSystem network adapters equipped with SFP28 optical cages, such as the Broadcom 57414, Intel E810-DA2, and Mellanox ConnectX-5/ConnectX-6 Dx. It accepts standard LC duplex multimode fiber patch cords. It is backward compatible with 10GbE SFP+ ports when auto-negotiation is configured on the switch.

How to identify a genuine unit

The module features an all-metal SFP28 casing with a colored bail latch mechanism and LC duplex optical interface. The top label displays Lenovo option code 7G17A03537, FRU part number 01KN517, and feature code AV1B. In adapter management utilities, the module identifies with genuine Lenovo vendor authentication.

Buying used

When evaluating a pre-owned 25G SFP28 transceiver, inspect the optical ports for physical contamination or scratches. Confirm that the extraction bail moves freely and latches securely into host cages. Verify that digital diagnostic monitoring (DDM) reports proper optical levels when connected to a live switch port.

Reference prices (last 12 months, updated 2026-10-23)

Refurbished: USD 45 (1 sighting, Oct 2026)

Used: USD 35 (1 sighting, Oct 2026)

All sightings
SellerConditionPriceNoteSeen
eBayusedUSD 35eBay sold listing2026-10-23
ServerMonkeyrefurbishedUSD 45Tested clean working pull in anti-static bag2026-10-12

Prices seen on public listings on the dates shown, before tax and shipping. Not an offer.

Fits these models

Works together

How the lenovo 7G17A03537 connects to servers, storage and the network: 3 ways, with the hardware on each path.

iSCSI and NVMe/TCP over EthernetFile storage (NFS and SMB)Hyperconverged cluster

iSCSI and NVMe/TCP over Ethernet

Keep the speed the same at all three points: a 25GbE server, a 25GbE switch port and a 25GbE array port. Mixed speeds work but the slowest link sets the pace.

Adapters for the server

Switches

Storage

iSCSI and NVMe/TCP over Ethernet: how it fits together

File storage (NFS and SMB)

Front-end ports face the clients; back-end ports (on scale-out systems) connect the nodes to each other and need their own switch pair.

Adapters for the server

Switches

Storage

File storage (NFS and SMB): how it fits together

Hyperconverged cluster

Plan at least two 25GbE ports per node to two switches; all-NVMe clusters often move to 100GbE.

HCI nodes

Adapters for the server

Switches

Hyperconverged cluster: how it fits together

Plan and size it

Check compatibility with Lenovo

Before you buy, confirm the exact configuration against the vendor's own lists: firmware levels, operating systems, adapters and optics that Lenovo has tested with the lenovo 7G17A03537.

Buying or selling 7G17A03537?

New, refurbished or used. Tell us the quantity and condition and we connect you with a vetted reseller in your region, usually within one working day.

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Sources