# Power Supply Unit QNAP PSU f/TS409U 250 W

**URL:** https://aio.lv/en/product--qnap-sp-4bay-psu--3086786
**Data updated:** 2025-12-29 10:45 (EET)
**Category:** Power Supplies (PSU)
**Manufacturer:** QNAP
**Manufacturer code:** SP-4BAY-PSU
**EAN:** 4712511121988
**Warranty:** 1 Year
**Availability:** Available for order
**Price:** 84.99 €
**Prices and availability valid until:** 2026-07-18 23:59
**Price without VAT (21%):** 70.24 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--qnap-sp-4bay-psu--3086786

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 06.07.2026 | free |
| Pickup points | 09.07.2026 | 1.99 EUR |
| Courier delivery to door | 09.07.2026 | 4.99 EUR |

## Summary description

The QNAP PSU f/TS409U is a reliable 250 W power supply unit designed for servers. It features a non-modular cabling type and is compatible with various QNAP models including TS-439 Pro and 459 Pro+. With dimensions of 75 mm in width, 218 mm in depth, and 54 mm in height, this silver power supply ensures efficient performance and stability for your server needs.

## Long description

The QNAP PSU f/TS409U is a 250 W internal power supply designed for 1U rackmount and Intel-based 4/5/6-bay NAS and NVR systems. With a non-modular cabling design and compact dimensions (75 mm × 218 mm × 54 mm), this silver unit provides stable power delivery for compatible QNAP models such as the TS-439 Pro and 459 Pro+.
Advantages
This 250 W power supply offers reliable, continuous output suitable for small rackmount NAS and NVR systems. Its compact form factor fits 1U chassis and its fixed (non-modular) cabling reduces internal complexity. The unit’s construction and compatibility with specific QNAP models help ensure straightforward replacement and system stability.
Suitable for
1U rackmount NAS and NVR systems
Intel-based 4-bay, 5-bay and 6-bay QNAP NAS models (example: TS-439 Pro, 459 Pro+)
Server replacements and spare-parts inventory for compatible QNAP devices
Key specifications
Total power: 250 W
Cabling: non-modular (fixed)
Dimensions (W×D×H): 75 × 218 × 54 mm
Colour: Silver
Weight: 0.95 kg
Manufacturer part number (MPN): SP-4BAY-PSU
EAN: 4712511121988
How to use
Power down the NAS or NVR and disconnect mains power before replacing the unit. Remove the old power supply according to the device service manual, install the QNAP PSU f/TS409U in the same mounting position, and reconnect the internal cables firmly. After reassembly, restore mains power and verify normal system boot and stable power delivery.
Usage recommendations
Use the PSU only in compatible QNAP models and follow the device manufacturer’s instructions for safe replacement. Ensure the system firmware is up to date and that cooling and ventilation are adequate to maintain reliable operation.

## Specifications

### Power

| Feature | Value |
|---|---|
| Total power | 250 W |

### Ports & interfaces

| Feature | Value |
|---|---|
| Cabling type | Non-Modular |

### Performance

| Feature | Value |
|---|---|
| Purpose | Server |
| Compatible products | TS-439 Pro/439 Pro II/439 Pro II+/459 Pro/459 Pro+/410U/419U |

### Design

| Feature | Value |
|---|---|
| Product colour | Silver |

### Weight & dimensions

| Feature | Value |
|---|---|
| Weight | 0.95 kg |
| Height | 54 mm |
| Width | 75 mm |
| Depth | 218 mm |

### Logistics data

| Feature | Value |
|---|---|
| Harmonized System (HS) code | 84733020 |

## FAQ

### How much does the Power Supply Unit QNAP PSU f/TS409U cost, and is it available for purchase?

The price is 84.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 2 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 06.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay, Installment. All transactions are 100% secure and encrypted.

### Can Power Supply Unit QNAP PSU f/TS409U be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. Learn more about installments and credit options: https://aio.lv/en/payment#b3

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All QNAP products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized QNAP service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

### How can I tell if this product suits my needs?

When making a choice, we recommend paying attention to the key features: total power, weight, product colour, compatibility with your devices or usage conditions, material quality, functionality, and warranty terms. These characteristics will help you determine how well the model meets your needs.

## Image

https://aio.lv/img/cache/product/3086786/64784899_large.webp