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Synology Expansion Unit DX525 5-Bay 3.5" bays, Tower, A Type-C expansion Cable Included, 3 Years Warranty - Support DS925+ Expansion

PB Tech price
PB Tech price
$ 969 .35
 +GST
$ 1,114 .75
 inc GST
$969.35  +GST
$1,114.75

Synology Expansion Unit DX525 5-Bay 3.5" bays, Tower, A Type-C expansion Cable Included, 3 Years Warranty - Support DS925+ Expansion

The new 5-bay expansion units for 25-series desktop models
  • Brand: Synology
  • MPN: DX525
  • Part #: ENCSYN05250
  • UPC:
PB Tech price
$ 969 .35 $ 1,114 .75
 +GST  inc GST

No store stock available.

Click & Collect: Select your store to check availability
Delivery: Order now and it ships on 10 Nov When will I receive it?
$969.35  +GST
$1,114.75

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*12 Months No Payments & No Interest (“Payment Holiday”) is available on Long Term Finance (LTF) for in-store & online purchases. Min Spend $200. Lending criteria, $50 annual Account Fee, fees, Ts&Cs apply. $55 Establishment Fee applies to your first LTF transaction, $35 Advance Fee applies to subsequent LTF transactions. Standard Interest Rate currently 28.95% p.a. applies at the end of LTF Interest Free Period. Rates and fees correct as at date of publication, subject to change. Other interest rates and fees may apply. See qcard.co.nz for full details. Credit provided by Columbus Financial Services Limited. Excludes vouchers, gift cards, software licenses, game activation codes, pre-orders, Customized-to-Order (CTO) Apple Mac, and backorders.

*See here for full T&C

  • Brand: Synology
  • MPN: DX525
  • Part #: ENCSYN05250
  • UPC:

HDD Included

None

Number of Bays

5 Bays

Form Factor

Tower

Number of Cores

N/A

Processor Speed

N/A

Memory Size

N/A

1Gb RJ45 Ports

None

10Gb RJ45 Ports

None

Features

Expansion Unit DX525

Seamless capacity expansion for Synology DiskStation

 

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]

 

Notes:
1. Compatible drives are mandatory. Please consult our compatibility list before purchasing hard drives.

Specifications

Applied Models

Supports creating volumes across different units

DS925+

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

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.

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)

Relative 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%

Other

Certification

FCC
CE
BSMI
UKCA
EAC
VCCI
RCM
KC
BIS

Environment

RoHS Compliant

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

Manufacturer Part No:
DX525
Brand:
Product Type:
5-Bay
UPC
-
Product Family:
Expansion Unit
Shipping Weight:
5 kg
PB Part No:
ENCSYN05250
Product Model:
DX525
Warranty: 36 months *
* Warranty period is as stated above unless the manufacturer has chosen to specify a longer period.
All warranties are return to base unless otherwise specified.

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Delivery & Pick-up

Potential courier delays: Please note that due to the high volumes currently within the NZ courier network there is potential for some deliveries to be delayed.

Delivery Estimates

The estimated time to ship for each product we sell is detailed on the individual product page just underneath the price. From when your items ship, products typically arrive within 1-2 working days for North Island deliveries and 2-3 working days for South Island deliveries. Rural deliveries may take an extra working day. Bulk & hazard deliveries may take an extra 2-4 working days.

Next Day Delivery

Need your order in a hurry? PB Tech offers next day delivery for local Auckland addresses. Simple place your order before 4pm (provided your items are in stock) and select our next day delivery option in the checkout. T&C's apply. Learn more about Next Day Delivery.

Same Day Delivery

Need your order in a hurry? PB Tech offers same day delivery for Auckland, Hamilton, Wellington and Christchurch. Simple place your order before 1pm (provided your items are in stock) and select one of our same day delivery options 'Evening Delivery' or 'Urgent 3-hour Delivery' in the checkout. T&C's apply. Learn more about Same Day Delivery.

Shipping Costs

Shipping costs vary based on your location and the items being shipped and in some cases shipping may even be FREE.

To calculate what the shipping costs will be for your order, add the items you are interested in to your cart, view the Shopping Cart page, and select your 'Delivery Area' to calculate the shipping cost.

Shipping Security & Insurance

All orders shipped by PB Tech are sent via a courier with a signature required for each delivery. In some cases, and only where you have given the courier company permission to leave orders at a designated location, your order may be delivered without requiring a signature. All orders sent by PB Tech are fully insured in the unlikely event that your item(s) are damaged or go missing in transit.

1 Hour Store Pick-up / Click & Collect

You can pick-up your online order from any of our stores nationwide. You can select which store you want to pick up from at the checkout. Provided the store you select has stock and there's no hold-ups with payment we will have your order ready within 1 hour (during normal trading hours for that store) otherwise it may take up to 5 working days to transfer the stock to the store so your order can be fulfilled. Learn more about our Click & Collect process.

Overseas Shipments

PB Tech regularly ships overseas to Australia and beyond. If you are located in Australia, you can order directly from our Australian site www.pbtech.com/au. If you are from another country you can order from www.pbtech.com

Returns & Warranty

7 day right of exchange

If you change your mind after making a purchase, or realise you have ordered the incorrect item, you can enjoy the peace of mind that we offer a 7 day exchange policy.

To exchange a product, goods must be sealed and unopened, with packaging in original condition, accompanied by a valid receipt dated no more than 7 calendar days from when you request an exchange. A 20% restocking fee may be applied where goods are not returned in sealed, original packaging condition.

If there is not a suitable product that can be exchanged for your returned item you will be offered a credit on your account or gift card based on the value paid at the time of purchase. Items purchased on finance cannot be exchanged for a gift card.

 

Hassle free warranty service

If your product develops a fault within the manufacturer warranty period, you can either contact the manufacturer directly (some manufacturers provide a high level of warranty service - including free pickup or in some cases onsite repair), or return to one of our services centres / stores. Where the product has been directly imported by PB Tech, you need to contact us directly or present the product at any one of our service centres / stores together with your proof of purchase.

If your product develops a fault outside of the manufacturer warranty or PB Tech warranty period, we offer a full repair service and are an authorised repair agent for leading brands such as Samsung, HP, Toshiba, Lenovo and more.

 

Returning a product / making a warranty claim

To contact the manufacturer directly to troubleshoot your product or to request a warranty repair, please view the list of manufacturer / brand warranty contacts (for products imported directly by PB Tech please return to us directly by completing our request a return form).

To return a product to PB Tech directly, please complete our request a return form.

Or view our returns policy for more information.

Synology Expansion Unit DX525 5-Bay 3.5" bays, Tower, A Type-C expansion Cable Included, 3 Years Warranty - Support DS925+ Expansion

The new 5-bay expansion units for 25-series desktop models
  • Brand: Synology
  • MPN: DX525
  • Part #: ENCSYN05250
PB Tech price $969.35 Excluding GST PB Tech price $1,114.75 Including GST

Date Created: 05:13, 27-09-2025
Product URL: https://www.pbtech.co.nz/product/ENCSYN05250/Synology-Expansion-Unit-DX525-5-Bay-35-bays-Tower
Branch New Stock On Display
Auckland - Albany -
Auckland - Glenfield -
Auckland - Queen Street -
Auckland - Auckland Uni -
Auckland - Newmarket -
Auckland - Westgate -
Auckland - Penrose -
Auckland - Henderson (Express) -
Auckland - St Lukes -
Auckland - Manukau -
Hamilton -
Tauranga -
New Plymouth -
Palmerston North -
Petone -
Wellington -
Auckland - Head Office -
Auckland - East Tamaki Warehouse -
Christchurch - Hornby -
Christchurch - Christchurch Central -
Dunedin -

Features

Expansion Unit DX525

Seamless capacity expansion for Synology DiskStation

 

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]

 

Notes:
1. Compatible drives are mandatory. Please consult our compatibility list before purchasing hard drives.

Specifications

Applied Models

Supports creating volumes across different units

DS925+

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

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.

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)

Relative 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%

Other

Certification

FCC
CE
BSMI
UKCA
EAC
VCCI
RCM
KC
BIS

Environment

RoHS Compliant

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

Date Created: 05:13, 27-09-2025
Product URL: https://www.pbtech.co.nz/product/ENCSYN05250/Synology-Expansion-Unit-DX525-5-Bay-35-bays-Tower