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Expansion Unit
DX525
Enterprise-grade expansion unit storage solution

The Synology DX525 provides a dedicated local backup solution for your Synology DiskStation.
Uncompromising performance
Scalability
5 drive bays
Performance backed by Synology drives
Designed for Synology systems, Synology drives deliver consistent performance and unmatched reliability for your deployments.
(DX525)
Technical Specifications
Complete hardware and software specifications
Applied Models
Supports creating volumes across different units 25 series: DS1825+, DS1525+, DS925+, DS725+
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.
Storage
Drive Bays 5
Drive Type(See all supported drives) 3.5" SATA HDD 2.5" SATA SSD
Hot Swappable Drive* Yes
RAID Management through Synology DSM Yes
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
Appearance
Size (Height x Width x Depth) 166 mm x 230 mm x 223 mm
Weight 2.46 kg
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
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%
Certification
Certification FCC CE BSMI UKCA EAC VCCI RCM KC BIS
Warranty
Warranty 3-year hardware warranty, extendable to 5 years with EW201 or Extended Warranty Plus
Notes Availability varies by region. Before purchasing, please visit the official web pages of EW201/202 and Extended Warranty Plus for a list of eligible regions. The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more)
Environment
Environment RoHS Compliant
Packaging Content
Packaging Content Main Unit X 1 Expansion Cable: USB Type-C X1 Accessory Pack X 1 AC Power Adapter X 1 AC Power Cord X 1
Optional Accessories
Optional Accessories Enterprise Series 3.5" SATA HDD: HAT5300 Series Plus Series 3.5" SATA HDD: HAT3300 Series Enterprise Series 2.5" SATA SSD: SAT5200 Series
| SKU | DX525 |
| Barcode # | 846504005291 |
| Brand | SYNOLOGY |
| Shipping Weight | 2.4600kg |
Manufacturer Warranty: 5 Years Manufacturer Warranty
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