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Redundant power shelf improved resilience.
J9805A
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Aruba 640 Redundant/External PS Shelf
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J9805A
- Description:
- Aruba 640 Redundant/External PS Shelf
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J9805A Overview
J9805A is a high-performance network switch designed with a robust architecture that supports advanced stacking capabilities, ensuring smooth scalability and reliable performance. It offers multiple power options, including an AC power supply configuration, and a comprehensive port setup that facilitates both data connectivity and network management in demanding enterprise environments.
J9805A integrates high-density Ethernet ports with built-in POE support, enabling versatile use cases ranging from small to medium-sized network deployments to large-scale data centers. Its design emphasizes secure stacking and rapid data throughput, making it suitable for mission-critical applications that require dependable, scalable, and efficient connectivity.
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Request bulk order quote for J9805A for additional pricing. Browse the full Aruba 2920 Series Switches series or explore all Hpe products.
J9805A Specifications
- Product Type
- Switch
- Power Source
- AC Power Supply
- Layer Supported
- Layer 2
- Form Factor
- Rack-mount
- Power Consumption
- N/A
- Number of Ethernet Ports
- 24–48 Ports
- Number of Downlink Ports
- 24 Ports
- Manageable
- Managed
- Ethernet Technology
- 10/100/1000
- Media Type Supported
- Twisted Pair
- Redundant Power Supply Supported
- No
- Manufacturer Part Number
- J9805A
- Uplink Configuration
- 1G
- IOS
- LAN Base
- POE Support
- POE
- SFP Ports
- 4 SFP Ports
- Memory
- 256 MB
- Rack Units
- 1 RU
- Interface Ports
- 10/100/1000
- Port/Expansion Slot Details
- N/A
- Flash Memory
- 64 MB
- Switching Capacity
- 128 Gbps
- Switching Capacity with Stacking
- 256 Gbps
- Product Name
- J9805A Gigabit Switch
- Height
- 1.75 inches
- Width
- 17.5 inches
- Depth
- 12 inches
- Weight
- 15 lbs
J9805A Use Case
High-Availability Campus Core Deployment with J9805A-Aruba 640 Redundant Power Shelf
In a global financial institution’s data center, network architects integrate the J9805A-Aruba 640 Redundant/External PS Shelf with Aruba 6400 core switches to achieve 1+1 power redundancy. This configuration maintains uninterrupted connectivity for trading applications and real-time analytics, eliminating single points of failure and delivering 99.999% uptime SLAs.
Retail Chain Edge Consolidation Using J9805A-Aruba 640 External Power Shelf
A 500-store retail retailer deploys Aruba 6400 aggregation switches at each location and centralizes power modules via the J9805A-Redundant PS Shelf. This approach simplifies field service, reduces on-site hardware spares by 40%, and ensures continuous operation of POS terminals, Wi-Fi customer access and IoT sensors during utility fluctuations.
Healthcare Network Resilience with J9805A-Aruba 640 Redundant Power Shelf
In a multi-facility hospital network, IT teams install Aruba 6400 distribution switches backed by the J9805A external power shelf to support critical EHR systems and VoIP nurse call services. This redundant power design guarantees seamless failover during maintenance or grid outages, securing patient data access and clinical communication without disruption.
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table 
| J9805A |  J9732A |  J9727A |  J9729A |  J9726A | |
|---|---|---|---|---|---|
| Depth | 12 inches | 20 inches | 10 inches | 11 inches | N/A |
| Ethernet Technology | 10/100/1000 | 10/100/1000 | 10/100/1000 | 10/100/1000 | 10/100/1000 |
| Flash Memory | 64 MB | 64 MB | 64 MB | 256 MB | 64 MB |
| Form Factor | Rack-mount | Rack-mount | Rack-mount | Rack-mount | Rack-mount |
| Height | 1.75 inches | 1.75 inches | 1.75 inches | 1.75 inches | N/A |
| IOS | LAN Base | IP Services | IP Services | IP Services | IP Services |
| Interface Ports | 10/100/1000 | 10/100/1000 | 10/100/1000 | 10/100/1000 | 10/100/1000 |
| Layer Supported | Layer 2 | Layer 2 / Layer 3 | Layer 2 / Layer 3 | Layer 2 / Layer 3 | Layer 2 / Layer 3 |
| Manageable | Managed | Managed | Managed | Managed | Managed |
| Manufacturer Part Number | J9805A | J9732A | J9727A | J9729A | J9726A |
| Media Type Supported | Twisted Pair | Combo | Combo | Twisted Pair / Fiber / Combo | Twisted Pair / Fiber / Combo |
| Memory | 256 MB | 256 MB | 256 MB | 512 MB | 256 MB |
| Number of Downlink Ports | 24 Ports | 24 Ports | 24 Ports | 24 Ports | 24 Ports |
| Number of Ethernet Ports | 24–48 Ports | 24–48 Ports | 24–48 Ports | 24–48 Ports | 24–48 Ports |
| POE Support | POE | POE+ | POE+ | POE+ | POE+ |
| Port/Expansion Slot Details | N/A | N/A | N/A | 2 expansion slots for additional modules | N/A |
| Power Consumption | N/A | N/A | 250 W | 150 W | N/A |
| Power Source | AC Power Supply | Redundant Power Supply / AC Power Supply | AC Power Supply | Redundant Power Supply / AC Power Supply | Redundant Power Supply / AC Power Supply |
| Product Name | J9805A Gigabit Switch | J9732A High Performance Network Switch | J9727A 24-Port Stackable Managed Gigabit Switch | J9729A Enterprise Modular Switch | J9726A Network Switch |
| Product Type | Switch | Switch | Switch | Switch | Switch |
| Rack Units | 1 RU | 1 RU | 1 RU | 1 RU | 1 RU |
| Redundant Power Supply Supported | No | Yes | Yes | Yes | Yes |
| SFP Ports | 4 SFP Ports | 4 SFP Ports | 4 SFP Ports | 4 SFP Ports | 4 SFP Ports |
| Switching Capacity | 128 Gbps | 320 Gbps | 128 Gbps | 320 Gbps | N/A |
| Switching Capacity with Stacking | 256 Gbps | 640 Gbps | 256 Gbps | 640 Gbps | N/A |
| Uplink Configuration | 1G | 10G | 10G | 1G / 10G | 1G / 10G / 40G |
| Weight | 15 lbs | 15 lbs | 10 lbs | 15 lbs | N/A |
| Width | 17.5 inches | 17.5 inches | 17 inches | 17.5 inches | N/A |
Reviews & Ratings
F
Furqan Aziz
4
Stable power delivery.
M
Marco Conti
5
Easy integration.
S
Saqlain Ahmed
4
Reliable operation.
P
Philip Turner
4
Good redundancy option.
Questions & Answers
What is the Aruba 640 Redundant/External PS Shelf (SKU J9805A)?
The Aruba 640 Redundant/External Power Shelf (J9805A) is a 19″ rack-mountable chassis that houses up to four hot-swappable power supplies, delivering redundant power protection for Aruba 6400 series switches.
Which Aruba switches are compatible with the J9805A power shelf?
The J9805A is fully compatible with all Aruba 6400 series switches, including 6405, 6410, and 6420 models, providing seamless power integration and redundancy.
How many power modules can the Aruba 640 shelf support?
The Aruba 640 power shelf accepts up to four HPE PS-KA1 or PS-EA1 power modules, enabling N+1 power redundancy or full load balancing across modules.
What are the dimensions and rack-mount requirements?
The J9805A measures 2U height, 438 mm depth and 445 mm width, requiring a standard 19″ rack and 2U of rack space for installation.
How does the redundant power design work?
The redundant design ensures continuous operation by using N+1 power modules: if one PSU fails, the remaining modules immediately take over without disruption.
What voltage and input range does the J9805A support?
The J9805A supports a universal AC input range of 100–240 VAC at 47–63 Hz, accommodating global power standards without manual reboot or reconfiguration.
What safety and compliance certifications does it carry?
The Aruba 640 power shelf is UL, CE, RCM and CCC certified, meeting global safety, EMI/EMC and environmental compliance standards.
What operating temperature and humidity ranges are supported?
The shelf operates between 0°C and 45°C at up to 90% non-condensing relative humidity, ensuring reliable performance in standard data-center environments.
How do I install the Aruba 640 power shelf?
Mount the shelf in a 19″ rack, slide in power modules, connect AC power cords to each module, and link the shelf’s power bus to the Aruba 6400 switch per the Quick Install Guide.
What diagnostic and management features are available?
The J9805A provides front-panel LEDs for power-good, fan-fail and module status, plus remote SNMP monitoring via the attached Aruba 6400 switch.
What is included in the J9805A package?
Each J9805A shipment includes the 2U chassis, mounting brackets, power bus cables, rack screws and a quick-start installation guide.
Is there a warranty for Aruba 640 redundant power shelves?
Yes, HPE offers a limited lifetime warranty on the J9805A chassis and a one-year warranty on individual power modules, backed by worldwide support.
How do I purchase spare power modules for the shelf?
Spare PS-KA1 or PS-EA1 modules can be ordered through Aruba/HPE resellers or the HPE Parts Locator using the corresponding spare part numbers.
Can I mix PS-KA1 and PS-EA1 modules in the same shelf?
Yes, you can mix PS-KA1 (460 W) and PS-EA1 (875 W) modules to match power requirements and optimize redundancy without compatibility issues.
What is the average lead time for J9805A orders?
Lead times vary by region and distributor but typically range from 2–4 weeks; contact your Aruba reseller for exact availability and expedited options.
How does the Aruba 640 power shelf improve network uptime?
By providing redundant and hot-swappable power modules, the J9805A eliminates single points of failure and ensures continuous switch operation during maintenance or PSU replacement.