865408-B21 — HP 500W Flex Slot Platinum Power Supply
MPN: 865408-B21|By: HP
Starting from
$310
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 865408-B21 identifies this HP 500W flex slot Platinum power Supply. Headroom matters more than the label wattage once GPUs or a full drive bay are in the chassis. This supply is rated 500W. Tell us the configuration and we will work the draw out rather than guess at it.
Send the quantity you need and we will come back within 48 business hours with availability confirmed, not estimated.
Featuring
- Power Rating
- 500W
- Manufacturer
- HP
Physical characteristics
- Product Type
- Power Supplies
Miscellaneous
- Efficiency Rating
- Platinum
- 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.
Published specifications for 865408-B21. Anything not listed here we will confirm against the manufacturer's documentation before quoting — we would rather answer the question than let you assume.
Where the HP 865408-B21 is deployed
- Swapping out a failed power supply for 865408-B21 under change control
- Re-rating power after adding accelerators or drives
- Adding a second supply to a chassis shipped with one
Who this part is for
- MSPs holding a matched PSU spare per chassis family
- Engineers adding a second supply to a chassis shipped with one
- Procurement sourcing a like-for-like supply outside a maintenance contract
What you get ordering this from us
Ordered by part number
865408-B21 is what is quoted and 865408-B21 is what ships; where an alternate code is genuinely the same part we name it rather than swap it silently.
Volume pricing
The listed price is per unit; tiered pricing applies at quantity and purchase orders are accepted.
Compatibility checked
We confirm the part is supported on your platform before it ships, rather than leaving the check to you.
Questions buyers ask about this part
- Is 865408-B21 genuine and is the warranty intact?
- Yes — new and sealed, with the HP warranty and the firmware update path intact. We do not sell refurbished stock as new, and we do not source grey-market units.
- Will 865408-B21 work in my server?
- Send the server model and the part number of the supply already fitted. In a redundant pair both units have to match on wattage and efficiency grade, or the chassis alerts on every boot.
- Do you accept purchase orders and quote at volume?
- Yes — POs from qualified organisations, net terms on approval, and banded pricing once the quantity is worth banding. Send the number and we will price it properly.
Compare other Power Supplies we stock
Browse all Power Supplies or everything we stock from HP.
Specifying a system, not just the part?
An accelerated node draws far more than a general-purpose server, so power is sized with the build rather than assumed from the chassis.