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Synology Expansion Unit DX525 5-Bays – DX525
Brand: Synology
AED 1,845.00 excl. VAT
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AED 1,845.00 excl. VAT
Best Price: AED 1,798.88 on Bank Transfer / Cash Payment (-AED 46.13)
Estimated delivery between Mar 14, 2026 - Mar 21, 2026
For urgent delivery, please contact sales before ordering. Orders usually ship as per the estimated delivery date in certain case backorders may take 4–12 weeks. Images are for illustration only and may differ from the actual item.
Synology Expansion Unit DX525 5-Bays – DX525
Expansion Unit Desktop 5 bays, please be aware of compatible models (https://www.synology.com/en-global/products/expansion)
Expansion Unit DX525
Seamless capacity expansion for Synology DiskStation
Overview
Features
Storage expansion without downtime
Easily add five additional drive bays to your Synology DiskStation.1 The DX525 supports both 2.5″ and 3.5″ SATA drives and features plug-and-play setup and hot-swap capability for uninterrupted operation during capacity expansion.
Dedicated local backup solution
The Synology DX525 provides a dedicated local backup solution for your Synology DiskStation. When configured as a separate volume, it safeguards data on its local disks in case of system failure.
Online volume expansion
Managed through the host NAS’s DiskStation Manager (DSM), the DX525’s additional bays are immediately available upon connection. On-the-fly volume expansion ensures uninterrupted service and storage expansion on the host.
Performance backed by Synology drives
Designed for Synology systems, Synology drives deliver consistent performance and unmatched reliability for your deployments.1
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Detailed Tech Specs
Hardware Specs
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Applied Models |
Supports creating volumes across different units |
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|---|---|---|
| Notes | To have better performance, we recommend creating storage volumes physically located within the same NAS or Expansion Unit, rather than creating volumes across your NAS and Expansion Unit. | |
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Storage |
Drive Bays | 5 |
| Drive Type (See all supported drives) |
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| Hot Swappable Drive* | ||
| RAID Management through Synology DSM | ||
| Notes | Compatible drives are mandatory. Please consult our compatibility list before purchasing hard drives. For more details, please refer to this article. | |
|
External Ports |
Expansion Port | 1 |
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Appearance |
Size (Height x Width x Depth) | 166 mm x 230 mm x 223 mm |
| Weight | 2.46 kg | |
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Power |
Power Recovery | Synchronized with the Synology DiskStation |
| Power Supply Unit / Adapter | 90 W | |
| AC Input Power Voltage | 100V to 240V AC | |
| Power Frequency | 50/60 Hz, Single Phase | |
| Power Consumption* | 35.37 W (Access) 7.0 W (HDD Hibernation) | |
| British Thermal Unit | 120.69 BTU/hr (Access) 24.02 BTU/hr (HDD Hibernation) | |
| Notes | For more information on how power consumption is measured, refer to this article. | |
|
Temperature |
Operating Temperature | 0°C to 40°C (32°F to 104°F) |
| Storage Temperature | -20°C to 60°C (-5°F to 140°F) | |
| Operating Humidity | 8% to 80% RH | |
| Storage Humidity | 5% to 95% RH | |
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Others |
System Fan | 92 mm x 92 mm x 2 pcs |
| Noise Level* | 20.4 dB(A) | |
| Notes | Noise testing was conducted with the Synology system fully installed with Synology SATA HDDs and in an idle state. Two G.R.A.S. Type 40AE microphones are placed at a 1 m distance from the front and rear of the device. Background noise: 16.49-17.51 dB(A); Temperature: 24.25-25.75˚C; Humidity: 58.2-61.8% | |
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Certification |
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Warranty |
3-year hardware warranty, extendable to 5 years with EW201 or Extended Warranty Plus | |
| Notes |
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Environment & Packaging |
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Environment |
RoHS Compliant | |
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Packaging Content |
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Optional Accessories |
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Notes:
- Model specifications are subject to change without prior notice.
- The figures are based on Synology internal testing. Each performance test is done individually. No other services or applications are processed at the same time.
- The actual performance may be lower than lab testing figure due to differences in server configuration, deployment, and the number of active operations.
- If usage requirements exceed the specifications above, please contact our regional partners for professional advice.
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