# Power Supply Unit THERMALTAKE Smart BX3 550 W ATX 3.1, 80 PLUS Bronze, 120 mm fan, non-modular

**URL:** https://aio.lv/en/product--thermaltake-ps-spd-0550nnfabe-3--10893674
**Data updated:** 2026-01-21 11:04 (EET)
**Category:** Power Supplies (PSU)
**Manufacturer:** THERMALTAKE
**Manufacturer code:** PS-SPD-0550NNFABE-3
**EAN:** 4711475642942
**Warranty:** 5 Years
**Availability:** Available for order
**Price:** 51.99 €
**Prices and availability valid until:** 2026-07-23 23:59
**Price without VAT (21%):** 42.97 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--thermaltake-ps-spd-0550nnfabe-3--10893674

## 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 | 1.89 EUR |
| Courier delivery to door | 09.07.2026 | 4.99 EUR |

## Summary description

THERMALTAKE Smart BX3 550 W is an ATX 3.1 power supply designed for desktop PCs. It delivers 550 W peak/total power with a single +12V rail (54.2 A) and combined +3.3V/+5V power of 110 W. Features include 80 PLUS Bronze efficiency, active PFC, 120 mm silent fan, non-modular cabling, wide AC input (100–240 V) and 150 ms hold-up time. Compact 140 × 150 × 86 mm housing suitable for standard ATX builds.

## Long description

The Thermaltake Smart BX3 550 W power supply is an ATX 3.1–compatible unit designed for mainstream PC builds. It offers 550 W of continuous power, 80 PLUS Bronze efficiency, a non-modular flat black cable design and a 120 mm fluid-bearing fan. The unit meets ATX 3.1 timing and excursion requirements and includes a 5-year manufacturer warranty.
Advantages
The Smart BX3 provides ATX 3.1 compliance with support for power excursions and low-load efficiency, a high-quality 105°C main capacitor for improved durability, and a single high-amperage +12V rail with DC-to-DC regulation for stable voltage delivery. A Smart Zero Fan profile reduces noise by spinning the 120 mm fan only above a defined load threshold, while soft flat cables simplify installation.
Suitable for
Mainstream desktop PC builds requiring a reliable 550 W PSU
Budget-conscious users seeking ATX 3.1 compatibility and Bronze efficiency
Systems where quiet operation and straightforward cable routing are preferred
Key specifications
Total power: 550 W
Form factor: ATX
Efficiency: 80 PLUS Bronze
Fan: 120 mm fluid-bearing with Smart Zero Fan control
Cabling: Non-modular flat black cables
Main capacitor temperature rating: 105°C
Dimensions: 150 x 140 x 86 mm
Brand/Model: Thermaltake Smart BX3 (MPN: PS-SPD-0550NNFABE-3, EAN: 4711475642942)
Warranty: 5 years
How to use
Install the PSU into a standard ATX case following the case and motherboard manufacturer instructions. Connect the 24-pin ATX main cable, the required +12V CPU and PCIe connectors, and SATA/Molex connectors to drives and peripherals. Ensure the PSU AC input matches local mains voltage (100–240 V) and secure the unit with screws. Power on the system and verify stable operation and fan behavior; the Smart Zero Fan will remain off until load increases above its threshold.
Usage recommendations
Choose this 550 W Thermaltake Smart BX3 PSU for typical single-GPU systems and office or home builds. For higher-power gaming rigs or multi-GPU configurations, select a higher wattage model to maintain adequate headroom and efficiency.

## Specifications

### Power

| Feature | Value |
|---|---|
| Total power | 550 W |
| Power Factor Correction (PFC) type | Active |
| Peak power | 550 W |
| Hold time | 150 ms |
| Combined power (+3.3V) | 110 W |
| Combined power (+12V) | 550 W |
| Combined power (+5V) | 110 W |
| Combined power (-12V) | 3.6 W |
| Combined power (+5Vsb) | 15 W |
| Max output current (+3.3V) | 18 A |
| Max output current (+12V) | 54.2 A |
| Max output current (+5V) | 18 A |
| Max output current (-12V) | 0.3 A |
| Max output current (+5Vsb) | 3 A |
| Input current | 12 |
| AC input frequency | 50/60 |
| AC input voltage | 100 - 240 |

### Ports & interfaces

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

### Performance

| Feature | Value |
|---|---|
| Purpose | PC |
| 80 PLUS certification | 80 PLUS Bronze |
| ATX version | 3.1 |
| Silent mode | Yes |
| Power supply unit (PSU) form factor | ATX |

### Design

| Feature | Value |
|---|---|
| Fan diameter | 120 mm |
| Product colour | Black |

### Weight & dimensions

| Feature | Value |
|---|---|
| Height | 86 mm |
| Width | 150 mm |
| Depth | 140 mm |

### Operational conditions

| Feature | Value |
|---|---|
| Operating relative humidity (H-H) | 20 - 85 |
| Storage temperature (T-T) | -40 - 55 |
| Operating temperature (T-T) | 5 - 45 |
| Storage relative humidity (H-H) | 10 - 95 |

## FAQ

### How much does the THERMALTAKE Smart BX3 550 W PSU cost, and is it available for purchase?

The price is 51.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 38 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. All transactions are 100% secure and encrypted.

### 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 THERMALTAKE 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 THERMALTAKE 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, 80 plus certification, fan diameter, 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.

### Where can I download the instructions for THERMALTAKE Smart BX3 550 W PSU?

You can download the instructions in PDF format from the “Instructions” section on the product description page. The file contains complete information about installation, setup, and usage.

## Image

https://aio.lv/img/cache/product/10893674/64815994_large.webp