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Product Code: PSEL-256
MPN #: A-PWA1-550W
When your TerraMaster system flickers or shuts down under load, it’s usually the power source that’s struggling. The TerraMaster A-PWA1-550W, 550W Single Power Supply Unit (PSU) delivers a reliable 550 W of clean electricity, keeping your NAS running smoothly even during heavy data transfers. It’s a simple, single-unit solution that restores stability and protects your investment.
A weak or failing power supply can cause data loss, unexpected reboots and reduced performance, all of which cost you time and money. This PSU solves those issues by providing a stable, high-efficiency power feed that matches the demands of compatible TerraMaster devices. With its 80 PLUS certification, it reduces waste heat and energy bills while ensuring your system stays online when you need it most.
The 550 W Power Supply is ideal for upgrading or replacing the original unit in TerraMaster NAS models that require a single-supply configuration. It powers all internal components, from drives to processors, making it perfect for home offices, small businesses and media servers that run continuously.
You get consistent power delivery that prevents sudden shutdowns, extending the life of your drives. The high efficiency lowers electricity costs and reduces heat, meaning quieter operation. Its single-unit design simplifies installation and maintenance. Compatibility with TerraMaster hardware ensures a perfect fit without the need for adapters. Overall, it gives you peace of mind that your data storage runs reliably.
| Brand | TerraMaster |
| Model | A-PWA1-550W |
| Product Type | Single Power Supply Unit (PSU) |
| Power Output | 550W |
| Power Supply Type | Switching Power Supply |
| AC Input | 100-240V~, 7A, 50-60Hz |
| DC Input | 240V~, 2A, |
| DC Output | +12V, +12VSB |
| Maximum Load | +12V: 45A, +12VSB: 2.1A |
| Maximum Output | 550W |
| Efficiency | >80% at typical load |
| Revision | 00 |
| Certification | 80 PLUS |
| Country of Manufacture | Made in China |
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We are retiring PICOPC Products MNHO-073, MNHO-048 and MNHO-043 and they have reached EOL (End Of Life) as we are introducing new products with better technology. We would recommend you to look into MNHO-095. For Untangle, pfSense, OPNsense, Windows 11, Proxmox VE etc. we recommend MNHO-095 whereas for Sophos, Kerio Control and Endian, we would recommend MNHO-069. (A complete list of supported OS can be found in each product's listing)