HPE 720479-B21 800 Watt Power Supply
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720479-B21 HPE 800W Flex Slot Redundant Power Supply for G9 Refurbished

Availability: In Stock
Part Number#: 720479-B21
List Price was: $79.07
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Short Description:
720479-B21 800-Watt Flex Slot Redundant Power Supply Unit (PSU) for G9 Servers | Made by HPE | Refurbished
Product Condition:
Warranty provided by ALLHDD.COM:
30 Days

800 Watt Power Output and Flexible Slot Design

The HPE 800W Flex Slot Redundant Power Supply for G9 Servers (part number 720479-B21) is a high-powered and versatile power supply unit (PSU) designed for use in HPE G9 server systems. The 800W power output rating means that this PSU is capable of providing up to 800 watts of power to the server system, which is suitable for powering high-performance components such as processors and graphics cards.

The "Flex Slot" design of this PSU refers to the fact that it is designed to fit into a "Flex Slot" power bay in the server system, which is a proprietary design that allows for more efficient use of space and cooling in the server chassis. This design also allows for easy installation and removal of the PSU, as well as greater flexibility in terms of power redundancy and hot-swappability.

The "Redundant" in the name indicates that this PSU is designed to be used in a redundant power supply configuration, meaning that the server system can have multiple PSUs installed, with one PSU acting as a backup in case the primary PSU fails. This feature helps ensure that the server system remains online and operational even in the event of a PSU failure, and it is particularly useful for mission-critical systems that cannot afford to be down for even a short period of time.

Energy-Efficient Operation

The 720479-B21 HPE 800W Flex Slot Redundant Power Supply for G9 Servers is designed to operate in an energy-efficient manner by utilizing several key features.

First, it utilizes a high-efficiency power conversion technology, which allows it to convert electrical power into usable power for the server with minimal loss of energy. This means that less energy is wasted as heat, which reduces the need for cooling and ultimately results in less energy consumption.

Additionally, the power supply has a built-in power management system that can monitor and adjust the power usage of the server based on the workload. This means that the server will only use the power it needs, and not waste energy by drawing more than is necessary.

Finally, the power supply is designed to be installed in a flexible slot, which allows it to be easily replaced or upgraded as needed. This means that the server can be easily updated to the latest technology, which can improve energy efficiency and reduce energy consumption over time.

Easy Installation and Maintenance

The 720479-B21 HPE 800W Flex Slot Redundant Power Supply for G9 Servers is designed for easy installation and maintenance. The power supply is designed to fit into the flex slot of G9 servers, making it easy to install and remove when needed. It also features a redundant design, which means that it has a second power supply built-in, providing an additional level of reliability and protection for the server in case of power failure.

The power supply also features a simple and intuitive interface, making it easy to monitor and manage. It has an LED indicator that provides real-time status updates, which can be easily checked by the server administrator. Additionally, the power supply is designed to be low maintenance, which means that it requires minimal upkeep and can be easily serviced if needed.

Product Information 720479-B21 HPE

  • Brand Name: HPE
  • MPN: 720479-B21
  • Type: Power Supply - Hot-Plug / Redundant - Plug-in Module
  • Power Supply Type: Server
  • Spare Part Number: 754381-001
  • Model Number: DPS-800AB-11A
  • Assembly Number: 723600-201
  • HPE GPN: 723599-001
  • SKU: 720479-B21

Technical Information 720479-B21

  • Specification Compliance: Flex Slot
  • Cooling: Active Fan
  • Compliant Standards: UL, TUV, C-Tick, BSMI, cUL, CCC, KCC, WEEE, CISPR

Power Device

  • Power Capacity: 800 Watt / 915 VA
  • Input Voltage: AC 100-240 V
  • Frequency Required: 50 - 60 Hz
  • Efficiency: 94%+
  • 80 PLUS Certification: 80 PLUS Platinum


  • Compliant Standards: UL, TUV, C-Tick, BSMI, cUL, CCC, KCC, WEEE, CISPR

Environmental Parameters

  • Humidity Range Operating: 5% - 95% (non-condensing)
  • Max Operating Temperature: 55 °C
  • Min Operating Temperature: 5 °C

Dimensions & Weight (Shipping)

  • Shipping Depth: 14.61 cm
  • Shipping Height: 19.05 cm
  • Shipping Width: 37.47 cm
  • Shipping Weight: 1.59 kg

Compatibility Information 720479-B21 HPE 800W

  • HPE Apollo: 4510 Gen9 (800 Watt), 4520 Gen9 (800 Watt), 4530 (800 Watt)
  • HPE ProLiant DL Series: DL360 Gen9 (800 Watt), DL360 Gen9 Base (800 Watt), DL360 Gen9 CMS (800 Watt), DL360 Gen9 Entry (800 Watt), DL360 Gen9 Performance (800 Watt), DL380 Gen9 (800 Watt), DL380 Gen9 Base (800 Watt), DL380 Gen9 Entry (800 Watt), DL380 Gen9 Performance (800 Watt)
  • HPE ProLiant ML Series: ML350 Gen9 (800 Watt), ML350 Gen9 Base (800 Watt), ML350 Gen9 Entry (800 Watt), ML350 Gen9 Performance (800 Watt)
  • HPE SimpliVity 380 Gen9 Node (800 Watt)
Product Condition:
Warranty provided by ALLHDD.COM:
30 Days

About Refurbished Products

Refurbished products are typically refurbished by an Original Manufacturer or an affiliate of the manufacturer or 3rd party facility. This product may have minor blemishes due to normal product usage and doesn't necessarily come with documentation and software unless indicated, but has been well tested and generally has never had any defects.

Please choose your location for calculate shipping cost.


ALLHDD guarantees that the products will not have defects in material that will affect the product's functionality during the Standard Warranty Period. The warranty period starts when the merchandise/items from our warehouse.

What does ALLHDD.Com warranty cover?

30-days to 3 years warranty:

Replacement or refund. In the case of material defects, we will try to replace the product first. The product will be replaced before the expiration of the original warranty. For any failure of hardware, if we cannot process the replacement of the product(s)/model(s), we will refund the original selling/invoiced price. The shipping costs and sales tax, if any, are non-refundable. ALLHDD retains the right to decide whether the item(s) will process for replacement or refund.

What is not covered by our warranty?

The reason why our warranty does not cover any problem caused by the following conditions:

(a) misuse of hardware; accidental damage; carelessness product(s) damage; shock; temperature beyond the specification of any product; faulty installation; operation; modification of goods;

(b) any misuse outside the instructions in the user manual for any specific product;

(c) damaged caused by other hardware or equipment. The warranty will void if the item is returned with physical damage, damage to the retail box, removed from the box, counterfeit labels/labelled by them, or any modifications of internal and external covers. Data loss or damages to any other equipment we do not cover by our offered warranty.

What is the Manufacturer/Brand Warranty?

In general, a manufacturer's warranty service/support is a written guarantee to the buyer of a product. Its terms assure the replacement or repair of the product, if necessary, within a specified period after the purchase (2-5 years depending on the brand/manufacturer). It is typically included in the price of the product. Products are brand new and sealed and the original manufacturer box is complete with the Manufacturer's genuine warranty. For most of the brand new/retail products that come with the manual and box, exceptions may apply (i.e., Cisco, Juniper Networks).

For the server parts (i.e., Dell, HPE) to get Full coverage of the warranty server must have a full 3- 5 years warranty. However, ALLHDD.COM will cover the warranty duration if any Manufacturer doesn't support the advertised warranty and there is no refund for those.
Final Sale items are non-returnable/refundable in any situation. Any question? please ask our team before the shipment.

Important notes:

We can provide additional warranty service/support for any product you purchase from us if you need additional warranty coverage before finalizing the order from ALLHDD.Com. You need to ask in live chat/help or call us for more information.

Individual product warranty mentioned on each item product description page/detail page.

Free Technical support on purchased items, our expert consultancy over the phone, by email, by live chat, or by remote login.


Shipping Options and Estimated Delivery Time

UPS Shipping Options:

FREE UPS® Ground (Free shipping to all orders for 48 states!)
Estimated delivery time: 4-7 business days

UPS 3 Day Select®
Estimated delivery time: 3 business days

UPS 2nd Day Air®
Estimated delivery time: 1-2 business days, Delivery by 10:30 AM or 2:00 PM

UPS Next Day Air® Standard Overnight
Estimated delivery time: Overnight 2-5 PM, Standard Overnight Delivery.

UPS Next Day Air® - Priority Overnight
Estimated delivery time: Overnight Delivery (Next Business Day) Delivery by 10:30 AM or 12:00 PM

UPS Next Day Air® First Overnight - Early A.M
Estimated delivery time: Overnight 8:00 AM, Early morning, overnight delivery for your time-critical shipments.

UPS® First Overnight - Saturday
Estimated delivery time: Overnight 8:30 AM – Saturday

FedEx Shipping Options:

FedEx Ground®
Estimated delivery time: (4–7 business days in the contiguous 48 states)
*For residential delivery via FedEx Ground use FedEx Home Delivery®
Estimated delivery time: 4−7 business days, based on the distance to the destination.

FedEx Express Saver®
Estimated delivery time: 3 business days (by 4:30 PM to U.S. businesses; by 8:00 PM to residences)
Available throughout all 50 states (except Hawaii and Alaska)

FedEx 2Day®
Estimated delivery time: 2 business days (by 4:30 PM to U.S. businesses; by 8:00 PM to residences)
Available throughout all 50 states

FedEx Standard Overnight®
Estimated delivery time: Next-business-day (by 4:30 PM to U.S. businesses and by 8:00 PM to residences)
Available throughout all 50 states (Hawaii is outbound only)

FedEx Priority Overnight®
Estimated delivery time: Next-business-day (by 10:30 PM to U.S. businesses, noon to most residences)
Available throughout all 50 states

FedEx First Overnight®
Estimated delivery time: Next-business-day (by 8:30 or 9 AM to most areas)
Available throughout all 50 states

Worldwide Shipping Options:

UPS®/FedEx® International Economy

Estimated delivery time: 4-7 business days

UPS®/FedEx® International Priority

Estimated delivery time: 2-4 business days

UPS®/FedEx® Ground Shipping Canada

Estimated delivery time: 5-8 business days

Important notes:

  • The processing of orders with Ground Shipping can take up to 24-48 hours. But we try to process all orders the same day.
  • We are not responsible for weather problems that may affect the delivery of goods by carriers. We cannot guarantee the exact delivery time, regardless of the carriers' claims.
  • If you have any specific delivery time requirements, please contact our customer support and someone from our customer service team will be able to help you.
  • You can estimate the shipping cost from the products detail page, also available on the checkout page
  • The shipping cost depends on box dimensions, weight, and zip/postal code
  • To get a FedEx® delivery service you need to mention it on the checkout page notebox.
  • For urgent shipments, please contact our customer service.
  • Shipping cut off 4:00 PM (Monday-Friday) and available blind drop shipment.