HPE ProLiant ML350 Gen12 Power Supplies
Genuine HPE Flex Slot power supplies for the HPE ProLiant ML350 Gen12, new and refurbished. The tower takes up to two hot-plug Flex Slot units for 1+1 redundancy, and the choice runs from an 800W Platinum unit that runs on a 100 to 120 VAC outlet to an 1800W-2200W Titanium unit that needs a high-line circuit.
ML350 Gen12 Power Supply Specifications
- Form factor: HPE Flexible Slot (Flex Slot), hot-plug, tool-less, sharing a common electrical and physical design across select HPE ProLiant Compute Gen12 servers
- Bays: two; a single unit powers the server and a second, identical unit gives 1+1 redundancy
- Units listed: 800W Platinum Low Halogen (94% efficiency), 1000W Titanium (96%), 1600W Platinum Low Halogen (94%), 1600W -48VDC, and 1800W-2200W Titanium (96%)
- Input: 100 to 120 VAC and 200 to 240 VAC for the 800W and 1000W units; 200 to 240 VAC only for the 1600W Platinum and 1800W-2200W units; 40 to 72 VDC for the -48VDC unit
- Output: the 1800W-2200W unit delivers 1799W at 200 VAC and 2200W at 240 VAC; the 800W, 1000W and 1600W units deliver their rated output at every supported input
- Mixing: two different power supply models in one server is not supported
Above 1000W, the circuit changes. The 800W Platinum and 1000W Titanium units run at full output from 100 VAC, but the 1600W Platinum and the 1800W-2200W Titanium accept 200 to 240 VAC only, and the largest unit reaches 2200W only at 240 VAC. Buy two identical units for 1+1 redundancy — HPE does not support mixing two different power supply models — and run the HPE Power Advisor against the real parts list before choosing.
Which ML350 Gen12 power supply do you need?
| Power supply | Efficiency | Input | Suits |
|---|---|---|---|
| HPE 800W Flex Slot Platinum Hot Plug Low Halogen (P38995-B21) | Platinum, 94% | 100 to 240 VAC | Lighter builds on a standard low-line outlet |
| HPE 1000W Flex Slot Titanium Hot Plug (P03178-B21) | Titanium, 96% | 100 to 240 VAC | The most output available on low-line power |
| HPE 1600W Flex Slot Platinum Hot Plug Low Halogen (P38997-B21) | Platinum, 94% | 200 to 240 VAC only | Heavier builds on a high-line circuit |
| HPE 1600W Flex Slot -48VDC Hot Plug (P17023-B21) | DC | 40 to 72 VDC | Telecom and DC plant installations |
| HPE 1800W-2200W Flex Slot Titanium Hot Plug (P44712-B21) | Titanium, 96% | 200 to 240 VAC only | The heaviest configurations; 2200W needs 240 VAC |
The step from 1000W to 1600W is a change of circuit as much as a change of unit: the 1600W Platinum and the 1800W-2200W unit accept only 200 to 240 VAC, so an office on 110 to 120 V is limited to the 800W and 1000W Titanium units. HPE asks that the HPE Power Advisor be run against the exact configuration before a unit is chosen.
Choosing the Right ML350 Gen12 Power Supply
- Buy two of the same. Redundancy is 1+1 across two identical Flex Slot units; HPE does not support mixing two different models.
- Check the circuit before the wattage. Anything above 1000W on this server is high-line only, and the 1800W-2200W unit only reaches 2200W at 240 VAC.
- EU efficiency rules favour Titanium. HPE notes that single-output supplies sold into the EU, EEA, UK, Ireland, Switzerland or Turkey must be 96% efficient, and names P03178-B21 and P44712-B21 as meeting that requirement.
- Power cords are separate on CTO servers. HPE states that Gen12 CTO servers include no power cord and that the cord count must equal the power supply count; pre-configured servers include one.
Complete Your ML350 Gen12 Build
Power draw follows the processors, GPUs and fan kits — see ML350 Gen12 processors and the fan kits and accelerators on the ML350 Gen12 parts page. Also available: ML350 Gen12 memory, drives, storage controllers and networking adapters. The adjacent generation is ML350 Gen11 power supplies, the rest of the range sits under HPE ProLiant ML tower server parts, and every model is indexed under HPE parts by server model. Background reading: how to fix excessive fan noise in HPE ProLiant servers.
ML350 Gen12 Power Supplies FAQ
How many power supplies does the ML350 Gen12 take?
Up to two HPE Flex Slot hot-plug power supplies. A single unit powers the server and a second, identical unit provides 1+1 redundancy. Mixing two different power supply models is not supported.
Which ML350 Gen12 power supplies run on 110 to 120 volt power?
The 800W Flex Slot Platinum and the 1000W Flex Slot Titanium, which HPE rates at full output from 100 VAC. The 1600W Platinum and the 1800W-2200W Titanium units accept 200 to 240 VAC only.
Is the ML350 Gen12 power supply hot-plug?
Yes. All listed units are HPE Flex Slot hot-plug power supplies with a common electrical and physical design, so a failed unit in a redundant pair can be swapped without powering the server down.
Is there a DC power option for the ML350 Gen12?
Yes. The HPE 1600W Flex Slot -48VDC Hot Plug Power Supply Kit accepts 40 to 72 VDC and delivers 1600W across that range, for telecom and DC plant installations.
Which power supply do I need for GPUs or 350W processors?
HPE does not tie a wattage to those parts in the QuickSpecs; it asks that the HPE Power Advisor be run against the exact configuration. The 1800W-2200W Titanium unit is the largest listed and reaches its full 2200W only at 240 VAC.
Does the power supply come with a power cord?
Not on a configure-to-order server. HPE states that Gen12 CTO servers include no power cords and that the number ordered must match the number of power supplies. Pre-configured models include a cord.
✅ Looking for a specific ML350 Gen12 power supply? Browse our full selection below.
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