HP Flexible Slot (Flex Slot) Power Supplies share a common electrical and physical design that allows for hot plug - tool-less installation into HP Proliant Gen10 Performance Servers. Flex Slot power supplies are certified for high-efficiency operation and offer multiple power output options - allowing users to right-size a power supply for specific server configurations. This flexibility helps to reduce power waste - lower overall energy costs - and avoid trapped power capacity in the data center.
Quick Spec
Table 1 shows the quick spec.
| Category | Proliant |
| Sub-Category | Proliant Power Supply |
| Generation | G9 G10 |
| Part Number | 865434-B21 |
| Device Type | Power Supply |
| Power Provided | 800 Watts |
| Fan | Internal |
| Manufacturer | Hewlett Packard |
| Form Factor | Plug-In Module |
| Efficiency | 96% |
| Specification Compliance | Flex Slot |
| Voltage Required | AC 277V/380V DC |
| Hot Plug | Yes |
Product Features
- High-quality power supply kit for HPE servers
- 800W power output for demanding server systems
- 48VDC power source for specific power infrastructure setups
- Compatible with various HPE server models
- Hot-plug design for easy installation and maintenance
Product Applications
- Data centers
- Server environments
- Enterprise IT infrastructure
Compare to Similar Items
Table 2 shows the comparison to similar items of 865434-B21.
| Model | Description | Differences |
|---|---|---|
| 865438-B21 | HPE 800W FS Ti Ht Plg LH Pwr Sply Kit | Different power source (48VDC vs. AC) |
| 865428-B21 | HPE 800W FS Univ Ht Plg LH Pwr Sply Kit | Different power source (48VDC vs. universal) |
| 864259-B21 | HPE 4TB SAS 7.2K LFF ST 512e Spl HDD | Different product category (power supply kit vs. hard drive) |
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865434-B21 Specification
865434-B21 Specification | |
| Dimensions & Weight | |
| Width | 2.7 in |
| Depth | 8.9 in |
| Height | 1.6 in |
| Weight | 32.1 oz |
| Dimensions & Weight (Shipping) | |
| Shipping Weight | 3.5 lbs |
| Shipping Depth | 14.8 in |
| Shipping Height | 5.8 in |
| Shipping Width | 7.5 in |
| Environmental Parameters | |
| Min Operating Temperature | 41 °F |
| Max Operating Temperature | 131 °F |
| Humidity Range Operating | 5 - 95% (non-condensing) |
| General | |
| Product Type | Power supply - hot-plug / redundant |
| Subcategory | Power supplies |
| Header | |
| Compatibility | PC |
| Manufacturer | HP CTO Server Avnet |
| Packaged Quantity | 1 |
| Product Line | HPE |
| Brand | HPE |
| Miscellaneous | |
| Compliant Standards | BSMI, C-Tick, CCC, CISPR Class A, cUL, KCC, Low halogen, TUV, UL, WEEE |
| Power Device | |
| Voltage Required | DC -48 V |
| Frequency Required | 50 - 60 Hz |
| Power Provided | 800 Watt |
| Input Voltage Range | DC -40 - -72 V |
| Form Factor | Plug-in module |
| Specification Compliance | Flex Slot |
| Power Capacity (VA) | 883 VA |
| Power Supply Compatibility | PC/Server |
| Efficiency | 94% |
| 80 PLUS Certification | 80 PLUS Platinum |



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