# Power Supply Unit Seasonic SSP-300SUB 300 W

**URL:** https://aio.lv/en/product--seasonic-ssp-300sub--3501525
**Data updated:** 2025-12-29 10:57 (EET)
**Category:** Power Supplies (PSU)
**Manufacturer:** SEASONIC
**Manufacturer code:** SSP-300SUB
**EAN:** 4711173873501
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 54.49 €
**Prices and availability valid until:** 2026-07-23 23:59
**Price without VAT (21%):** 45.03 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--seasonic-ssp-300sub--3501525

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 09.07.2026 | free |
| Pickup points | 14.07.2026 | 1.89 EUR |
| Courier delivery to door | 14.07.2026 | 4.99 EUR |

## Summary description

The Seasonic SSP-300SUB is a 300 W power supply unit designed for servers. It features a 20+4 pin ATX motherboard connector, operates on an AC input voltage of 100 - 240 V, and has an active cooling system with a 4 cm fan. This unit is 1U in form factor and is certified with 80 PLUS Bronze for energy efficiency, making it a reliable choice for server applications.

## Long description

The Seasonic SSP-300SUB is a 300 W Flex ATX switch-mode power supply designed for server and industrial applications. It supports a full-range AC input (100–240 V), provides a 20+4 pin ATX motherboard connector, and uses an active cooling system with a 40 mm fan in a 1U form factor. Certified 80 PLUS Bronze, the unit targets efficient, compact power delivery for workstations, standard or advanced servers, and automation or communication systems.
Advantages
The SSP-300SUB delivers stable 300 W output with 80 PLUS Bronze efficiency and full-range AC input for worldwide operation. Its Flex ATX compact 1U design fits space-constrained server chassis and industrial enclosures, while the active cooling with a 40 mm fan and a low-noise fan control reduces audible disturbance in server rooms. The unit includes the standard 20+4 pin ATX connector for broad motherboard compatibility and a silver finish that suits professional installations.
Suitable for
Rack or tower servers requiring a compact 1U Flex ATX PSU
Workstations and small industrial PCs
Automation and communication equipment with 100–240 V AC supply
Key specifications
Total power: 300 W
AC input voltage: 100–240 V (full range)
Efficiency / certification: 80% (80 PLUS Bronze)
Motherboard connector: 20+4 pin ATX
Cooling: active, 40 mm fan
Form factor: 1U Flex ATX
Colour: Silver
How to use
Install the SSP-300SUB into a compatible Flex ATX or 1U chassis following the chassis manufacturer’s instructions. Connect the 20+4 pin ATX connector to the motherboard, secure any additional peripheral connections as required by your system, and connect the unit to a 100–240 V AC mains supply. Ensure adequate airflow around the PSU and confirm fan operation during initial power-up. Observe standard anti-static precautions when handling internal components.
Usage recommendations
Place the PSU in a chassis with unobstructed ventilation and avoid operating at ambient temperatures beyond the server manufacturer’s specified limits. For long-term reliability, operate the PSU below its maximum continuous load and ensure periodic dust removal from the fan and vents.

## Specifications

### Power

| Feature | Value |
|---|---|
| Total power | 300 W |
| Efficiency | 80 % |
| Power Factor Correction (PFC) type | Active |
| Power protection features | Under voltage, Short circuit, Over voltage, Over current |
| Max output current (+3.3V) | 14 A |
| Max output current (-12V) | 0.8 A |
| Max output current (+5Vsb) | 2 A |
| AC input frequency | 50 - 60 |
| AC input voltage | 100 - 240 |
| Max output current (+12V2) | 18 A |
| Max output current (+12V1) | 18 A |

### Ports & interfaces

| Feature | Value |
|---|---|
| Motherboard power connector | 20+4 pin ATX |
| Number of SATA power connectors | 1 |
| Peripheral (Molex) power connectors (4-pin) | 2 |

### Performance

| Feature | Value |
|---|---|
| Purpose | Server |
| 80 PLUS certification | 80 PLUS Bronze |
| ATX version | 2.31 |
| Power supply unit (PSU) form factor | 1U |

### Design

| Feature | Value |
|---|---|
| Fan diameter | 40 mm |
| Number of fans | 1 fan(s) |
| Cooling type | Active |
| Fan location | Rear |
| Fan speed | 0 - 1000 |
| Product colour | Silver |

### Certificates

| Feature | Value |
|---|---|
| Compliance certificates | RoHS |

### Weight & dimensions

| Feature | Value |
|---|---|
| Height | 40.5 mm |
| Width | 81.5 mm |
| Depth | 150 mm |

### Other features

| Feature | Value |
|---|---|
| Mounting type | Rack mounting |
| Screws included | Yes |

### Safety regulation & standards

| Feature | Value |
|---|---|
| Safety | CB, cUL, TUV, CCC, BSMI |

## FAQ

### How much does the Power Supply Unit Seasonic SSP-300SUB cost, and is it available for purchase?

The price is 54.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 19 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 09.07.2026 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 SEASONIC 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 SEASONIC 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, efficiency, motherboard power connector, 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 Power Supply Unit Seasonic SSP-300SUB?

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/3501525/64786856_large.webp