Synology RX1225RP 12-Bay 2U Expansion Unit with Redundant PSU
Prices in SGD, excluding 9% GST.
PRODUCT DESCRIPTION
Synology RX1225RP 12-Bay 2U Expansion Unit with Redundant PSU - 5 Years Warranty
Twelve more bays
Adds 12 bays to compatible RackStation systems without downtime.
Redundant design
Redundant PSUs and modular trays and fans for quick replacement.
5-year warranty
Backed by a 5-year limited warranty.
Synology Expansion Unit RX1225RP Datasheet — Technical Specifications
Storage
| Product Name | Synology Expansion Unit RX1225RP |
| Model | RX1225RP |
| Drive Bays | 12 |
| Drive Types | 3.5" SATA HDD, 2.5" SATA SSD |
| Host Connection | 1 x expansion port (Mini-SAS HD) |
Power
| Power Supply | 550 W, redundant |
| Power Consumption | 92.13 W (access), 33.44 W (HDD hibernation) |
Physical & Environment
| Form Factor | 2U rackmount |
| Dimensions (H x W x D) | 88 x 482 x 724 mm (with ears) |
| Weight | 13.9 kg |
| Fans | 4 x 80 mm |
| Noise Level | 39.5 dB(A) |
| Operating Temperature | 0–35 °C |
Warranty
| Warranty | 5 years (Synology) |
Compatibility & Applications
Compatibility
RS6426xs+, RS4826xs+, RS3626xs, RS1626xs+ and RS2825RP+. Rail kit RKS-02 sold separately.
Typical Use
Adds 12 redundant-power bays to a 2025/2026 RackStation.
Package Contents & Synology Ordering Information
In the Box
1 x RX1225RP expansion unit, expansion cable, power cord(s), accessory kit and quick installation guide. Drives not included.
Synology Expansion Units at SourceIT
| Model | Key feature |
| DX517 | 5-bay SATA expansion unit |
| DX1222 | 12-bay SATA expansion unit |
| RX426 | 4-bay 1U SATA expansion unit |
| RX1225RP (this listing) | 12-bay 2U SATA expansion unit with redundant PSU |
| RX1222sas | 12-bay 2U SAS/SATA expansion unit |
| RX1223RP | 12-bay 2U SATA expansion unit with redundant PSU |
| RXD1219sas | 12-bay 2U dual-port SAS expansion unit |
| FX2421 | 24-bay 2U 2.5" SAS/SATA expansion unit |
| RX6025sas | 60-bay 4U SAS expansion unit |
Official Synology Videos
Enhance Your Synology NAS (hardware upgrades) — Synology SPOT (official Synology channel)
Datasheet & Downloads
| Specifications | RX1225RP on synology.com |
| Compatibility | Synology compatibility list |
| Downloads | RX1225RP Download Center |
Frequently Asked Questions — Synology Expansion Unit RX1225RP
Which hosts are supported?
RS6426xs+, RS4826xs+, RS3626xs, RS1626xs+ and RS2825RP+.
Which rail kit fits?
RKS-02 (sold separately).
What is the warranty?
5 years Synology limited warranty.
Do I get a GST invoice?
Yes. Supplied by SourceIT in Singapore with a GST invoice.
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