865408-B21: HP 500W Flex Slot Platinum Power Supply
MPN: 865408-B21|By: HP
Starting from
$310
Indicative. Final pricing is confirmed with your quote.
In Stockships worldwide
- Condition:
- New (authorized channel)
- Warranty:
- Full manufacturer warranty
Prefer your own inbox? Email us about this part
Bulk order? Request volume pricing
Authorized & warrantied
Sourced through authorized distribution, with the full manufacturer warranty.
Compatibility checked
Validated against your server platform before dispatch.
Delivery & lead time
Confirmed with your quote, including expedited freight where available.
Business & public sector
POs, net terms and volume pricing for qualified organizations, government and edu.
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.
Specifications
General
- Manufacturer part number
- 865408-B21
- Product Type
- Power Supplies
- Manufacturer
- HP
Technical specifications
- Power Rating
- 500W
- Efficiency Rating
- Platinum
Published specifications for 865408-B21. Anything not listed here we will confirm against the manufacturer's documentation before quoting, because 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
| Model | Brand | Key spec | Availability | From |
|---|---|---|---|---|
| Dell 495W Hot-Plug Redundant Power Supply for PowerEdge Rack Servers | Dell Technologies | Efficiency: 80 PLUS Platinum | In Stock | $175 |
| HPE 500W Flex Slot Platinum Hot-Plug Power Supply for ProLiant Servers | HPE | Efficiency: 80 PLUS Platinum | In Stock | $190 |
| Supermicro 1200W Redundant Titanium Hot-Swap Power Supply Module | Supermicro | Efficiency: 80 PLUS Titanium | In Stock | $415 |
| Lenovo 750W 80 PLUS Platinum Hot-Plug Server Power Supply | Lenovo | Wattage: 750W | In Stock | $165 |
| IBM 550W 80 PLUS Platinum Hot-Plug Server Power Supply | IBM | Wattage: 550W | In Stock | $100 |
| Delta Electronics 800W 80 PLUS Titanium Hot-Plug Server Power Supply | Delta Electronics | Wattage: 800W | In Stock | $125 |
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.