IBM 98Y3579 — 300W Hot-Swap Power Supply Module for Mellanox MIS50xx / IS5000-Series InfiniBand Switch Systems
Identity
This listing is for an OEM service part carrying the printed part number 98Y3579. The OEM of record is IBM; the module itself is built on a Mellanox Technologies / TDK-Lambda power supply platform. Research across the secondary market — including listings that show the physical unit label — consistently identifies 98Y3579 as a 300 W power supply module for Mellanox MIS50xx-series InfiniBand switch systems, cross-referenced to platform number R70005 and alternate part number MIS000054. That is the basis on which this page is written; no vendor datasheet naming 98Y3579 was located. T.E.S photographs and reads the label of this unit and confirms the exact model before dispatch.
What is confirmed about 98Y3579
The printed part number is 98Y3579, an IBM-branded field service part.
Every source located describes 98Y3579 as a 300 W power supply module, not a switch or an adapter card.
Cross-referenced platform / module number: Mellanox-TDK-Lambda R70005. Alternate part number quoted alongside it: MIS000054.
Output rating shown on unit labels in reseller photographs: 12 V DC, 25 A, 300 W.
Host platform family cited by sources: Mellanox MIS50xx 1U InfiniBand switch systems (the IS5000 series, e.g. IS5025 / IS5030 / IS5035). Several listings also reference the Mellanox BridgeX BX5020 gateway.
Form factor: hot-swap PSU module with integrated fan, of the type used in the redundant PSU bays of those chassis.
What is not yet confirmed
This list is deliberate. It is what T.E.S could not establish from documentation, and it is read off the physical unit before dispatch rather than guessed at here.
Airflow direction. The MIS50xx platform shipped in both connector-to-port and port-to-connector airflow variants, and airflow must match the fan drawers already in your chassis. The direction of this unit is not derivable from the part number.
Exact hardware revision. R70005 appears in the market at several revision levels (Rev. 08 among them); the revision of this unit is read from the label.
AC input variant and the regional cord type originally shipped with it.
Which chassis this specific unit was pulled from, and the running hours behind it.
The owner's stock list describes this line as a "Mellanox switch/adapter". Research does not support that description — every source found points to a power supply. T.E.S will confirm from the physical label before dispatch, and this page will be corrected if the unit is something other than a PSU.
Request label photos before you order
Ask us for photographs of this unit's product label and we will send them before you commit to anything. There are 20 units of 98Y3579 in this lot; we can photograph the specific unit or units allocated to your order, including the airflow marking and the output rating block. If the label does not match what is described on this page, we say so and re-quote or cancel — we do not ship a substitute and hope it fits. Quote part number 98Y3579 when you contact us.
Frequently asked questions
What exactly am I buying with 98Y3579?
A refurbished OEM service part whose printed number is 98Y3579. Consistent secondary-market evidence, including photographed unit labels, identifies it as a 300 W (12 V, 25 A) hot-swap power supply module built on the Mellanox / TDK-Lambda R70005 platform, used in Mellanox MIS50xx-series InfiniBand switch chassis. T.E.S has not located a vendor datasheet that names 98Y3579 directly, so the identification rests on that cross-reference plus the unit label, which we read before dispatch.
Will T.E.S confirm the exact model before shipping?
Yes. Confirming the label is a step in the dispatch process for 98Y3579, not something we do only on request. We read the part number, the output rating and the airflow marking off the unit before it leaves. If any of it contradicts this page, we contact you before shipping.
What if 98Y3579 turns out not to be what I need?
Tell us the chassis and the airflow direction you are matching before you order and we will check the unit against it first. If the label shows something other than what is described here, we re-quote or cancel — the risk of a mismatched identity is not passed to you silently. If a unit is already dispatched and the label was misread on our side, it comes back at our cost.
Is the 98Y3579 unit tested?
It is cleaned, visually inspected and bench-tested where a suitable test topology is available. For a PSU module that means a power-on and output check; it does not mean the module has been life-tested in a matching MIS50xx chassis. Ask us what was actually done to the unit allocated to you and we will tell you.
Can I get photographs of the 98Y3579 label before I order?
Yes, and we would rather you asked. Request label photos and we send images of the printed part number, the output rating block and the airflow marking for the specific unit before you commit. Twenty units are in stock, so we can also check the lot for the specific variant you need.
Why T.E.S IT-SOLUTIONS
T.E.S IT-SOLUTIONS supplies refurbished enterprise networking and server hardware from EU stock to a B2B market. On OEM service parts whose exact model is not established by the part number alone, we publish what we can verify and name what we cannot, instead of filling the gap with plausible-sounding specifications. Every unit is photographed and its label read before dispatch. If the unit differs from this page, we tell you before we ship.
Condition
Condition: Refurbished. Cleaned, visually inspected and bench-tested where a suitable test topology is available. EU stock, global B2B shipping. Final pricing for 98Y3579 is subject to confirmation of the exact model: if the label identifies a higher- or lower-specification variant than described above, we contact you and re-quote or cancel rather than shipping a mismatch.