QNAP TS-251D-4G
Network Attached Storages
Key facts
- Part number
- TS-251D-4G
- Brand
- QNAP
- Category
- Other
- Price
- AUD 878.90≈ USD 616 Reference price (RRP)
- Availability
- On request — ask for a quote
Overview
The QNAP TS-251D is an entry-level 2-bay NAS that targets home users looking to set up a multimedia entertainment solution (4K media transcoding and streaming) and those who just need a device to secure their data via their own personal cloud. Released back in January, the QNAP NAS comes in two models: TS-251D-4G and TS-251D-2G. Though the 2G ships with 2GB of RAM and the 4G with 4GB, they both can be expanded to a maximum of 8GB using the two DIMM slots.
Table 1 shows the quick spec.
TS-251D-4G provides these features and benefits:
Compare to Similar Items
Table 2 shows the comparison.
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Specifications
General
- CUP
- Intel® Celeron® J4025/J4005 2-core/2-thread processor, burst up to 2.9/2.7 GHz
- CPU Architecture
- 64-bit x86
- Graphic Processors
- Intel HD Graphics 600
- Floating Point Unit
- √
- Encryption Engine
- √(AES-NI)
- Hardware-accelerated Transcoding
- √
- System Memory
- 4 GB SO-DIMM DDR4 (1 x 4 GB)
- Maximum Memory
- 8 GB (2 x 4GB)
- Memory Slot
- 2 x SO-DIMM DDR4
- Flash Memory
- 4GB (Dual boot OS protection)
- Drive Bay
- 2 x 3.5-inch SATA 6Gb/s, 3Gb/s
- Drive Compatibility
- 3.5-inch SATA hard disk drives 2.5-inch SATA hard disk drives 2.5-inch SATA solid state drives
- Hot-swappable
- √
- M.2 Slot
- Optional via a QM2 PCIe adapter
- SSD Cache Acceleration Support
- √
- Gigabit Ethernet Port (RJ45)
- 1
- 5 Gigabit Ethernet Port (5G/2.5G/1G/100M)
- Expandable with an optional PCIe adapter
- 10 Gigabit Ethernet Port
- Expandable with an optional PCIe adapter
- Wake on LAN (WOL)
- √
- Jumbo Frame
- √
- PCIe Slot
- 1 Slot 1: PCIe Gen 2 x4
- USB 2.0 port
- 3
- USB 3.2 Gen 1 port
- 2
- USB 3.2 Gen 2 (10Gbps) Port
- Optional via a PCIe expansion card
- IR Sensor
- √
- HDMI Output
- 1, HDMI 2.0
- Form Factor
- Tower
- LED Indicators
- Power/Status, LAN, USB, HDD1-2
- Buttons
- Power, USB copy, Reset
- Dimensions (HxWxD)
- 168 × 105 × 226 mm
- Weight (Net)
- 1.48 kg
- Storage Temperature
- -20 - 70°C (-4°F - 158°F)
- Relative Humidity
- 5-95% RH non-condensing, wet bulb: 27˚C (80.6˚F)
- Power Supply Unit
- External Power Adapter, 65W, 100-240 V
- Power Consumption: HDD Sleep Mode
- 8.08 W
- Fan
- 1 x 70mm
- Sound Level
- 16.7 db(A)
- System Warning
- Buzzer
- Kensington Security Slot
- √
- Max. Number of Concurrent Connections (CIFS) - with Max. Memory
- 1500
Reference price history
Recorded reference and list prices over time. Not Prology selling prices.
- Latest
- AUD 878.90≈ USD 616
- Oct 2026
- Lowest recorded
- AUD 878.90≈ USD 616
- Highest recorded
- AUD 878.90≈ USD 616
- Recorded
- 2026
- 1 price point
AUD 878.90 rrp, recorded
Buy or sell QNAP TS-251D-4G
Buying QNAP
Looking to buy the QNAP TS-251D-4G? Prology supplies new, refurbished and used QNAP in Australia and the United States. Send the part number and quantity for a firm price.
Selling QNAP
Have a spare or decommissioned TS-251D-4G? Prology buys used and surplus QNAP — single units or whole lots — and replies with an offer within 1 business day. Sell your TS-251D-4G.
- What is the QNAP TS-251D-4G?
- The QNAP TS-251D-4G is an IT hardware part from QNAP – Network Attached Storages.
- How much does the QNAP TS-251D-4G cost?
- The reference price on record is AUD 878.90 (Oct 2026). It is a reference figure, not a selling price — ask Prology for a firm quote.
- Where can I buy the QNAP TS-251D-4G?
- It is not listed on the Prology store yet. Prology sources QNAP on request — request a quote and we reply with a firm price and lead time within 1 business day.
- Can I sell a used QNAP TS-251D-4G?
- Yes. Prology buys used and surplus QNAP, including the TS-251D-4G. Get an offer — sell outright or trade in against your next order.
Request a quote for TS-251D-4G
Tell us the quantity and condition you need. Prology replies with a firm price and lead time within 1 business day.