Scan code: LN66780 Manufacturer code: SS-520GB

Seasonic S1211-520 520W Power Supply - Fully Wired

520W Seasonic S12II-520 Bronze Series, 80PLUS Bronze, Dual Rail 20A, 1x120mm Silent Fan, Fully Wired, ATX PSU

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Scan code: LN66780 Manufacturer code: SS-520GB
3xs Approved
Was: £58.99
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Delivery Options
  • By DPD On 20th Jan to your specified address. | £5.48 Receive SMS with one-hour delivery window Weekend, timed and European delivery options are available at checkout

    Have your parcel delivered by DPD to your specified address. Receive SMS with one-hour delivery window

    Weekend, timed and European delivery options are available at checkout
  • Collect instore Collect from our Bolton store, BL6 6PE | Free

    Order online, collect from our Bolton store (25-28 Enterprise Park, Middlebrook, Horwich, Bolton, BL6 6PE)

  • UPS and DPD Pickup Pickup from local convenience store | £4.79

    Collect your parcel from your newsagents, petrol stations and convenience stores

  • SCANPROTECT Protect against installation damage for 28 days. More info

    ScanProtect is an enhanced warranty specifically designed and offered by Scan to reduce the risk of any mishap or damage to components during installation.

    Our aim with ScanProtect is to encourage our customers to upgrade or build their own PC confidently. For a small additional fee our customers are provided with complete peace of mind.

  • 48HR REPLACEMENT If you need to return this item, your replacement will be dispatched within 2 working days of your product arriving back at Scan. More info
Frequently Bought Together
Product Overview

520 Bronze Series

In addition to being highly efficient, the S12II Bronze Series maintains important features such as the stable and proven Double Forward Converter circuit design for reliable power conversion. Sea Sonic’s industry leading Smart and Silent Fan Control (S2FC) achieves not only reduced operating noise but by lessening the number of fan rotations it also incurs savings on the costs of energy for its users. The use of low resistance and high temperature rated Japanese brand capacitors only adds to the reliability of this unit, which will surely keep the power flowing when needed.

80 PLUS® Bronze

The 80 PLUS® Bronze certification indicates that a high percentage of the electricity is converted into useful power, therefore there is less heat lost and more money saved on the electricity bill. The 80 PLUS® Bronze certification guarantees greater than 82 %, 85 % and 82 % efficiency at 20 %, 50 % and 100 % operating loads, respectively. Sea Sonic’s Bronze Series is an economical choice with great performance and high built-in value.

Fluid Dyanamic Fan Bearing

High performance Fluid Dynamic Bearing (FDB) fans are designed to take advantage of the impact absorbance effects of oil. They are extremely reliable and generate considerably less operating noise and heat than ball bearing fans. The lubrication of the bearing surface reduces friction and vibration and therefore lowers overall power consumption. Due to the effortless, quieter rotations and its robust construction, this reliable fan technology also greatly increases the lifespan of the fan.

How It Works

When the fan shaft rotates, high pressure oil drifts along the grooves of the bearing sleeve to generate a thin layer of lubrication between the bearing faces. As the speed increases, so does dynamic oil pressure and the shaft is lifted from the bearing to create smooth, effortless rotations. The herringbone shape of the groves helps to efficiently channel the lubricant and avert leakage.


The intelligent thermal circuit feature is designed to find the optimal balance between the necessity to cool the components and the need to run the power supply in the most silent manner possible.

Universal AC Input

Switch-mode power supplies can tolerate a wide range of power frequencies and voltages. The power supply is designed to automatically adjust to the inpout AC voltage, therefore it can safely be used anywhere in the world.

Easy-swap Connectors

The markings on the connectors minimize the possibility of mistakes and facilitate installation.

• 120mm double ball bearing fan with FDB (Fluid Dynamic Bearing) for reduced noise output and extended fan life
• High-quality 105°C Japanese aluminum electrolytic capacitors ensure operation stability under extreme conditions and extend the PSU's life
• High +12V current output capability increases utilization possibilities by ensuring that there is adequate power to support system components
• Active PFC (power factor correction) up to 99% reduces line loss and power distortion
• Double forward converter design for high efficiency
• Smart & Silent Fan Control (S2FC) ensures an optimal balance between silence and cooling
• Honeycomb shaped ventilation holes optimize airflow for improved cooling and reduced noise
• All-in-one DC cabling design provides multifunctional support for PCs, IPCs, workstations, and server systems
• Easy swap connectors can be unplugged easily, quickly, and safely
• Full range 100 to 240 VAC input for safe use anywhere in the world
Size ATX
Edition S12II-520
Wattage 520 W
80 PLUS Certification 80 PLUS Bronze
Max. Efficiency (at 230Vac) 85 %
Cooling Fan
Fans 1 x 120mm
Internal +12V Rails Dual Rail
Rail 1 +12V 20 A
Rail 2 +12V 20 A
Rail 3 +12V N/A
Rail 4 +12V N/A
Rail 5 +12V N/A
Rail 6 +12V N/A
Max. Combined Output +12V N/A
Modular No
Modularity Fully Wired
SLI/CrossFire No
EPS 12V Yes
Motherboard Connector 20+4-pin
  • 1 x 4+4-pin CPU +12V (EPS)
  • 1 x 4-pin FDD Power
  • 4 x 4-pin Molex
  • 2 x 6+2-pin PCIe
  • 8 x SATA
Dimensions 115 x 180 x 310 mm (WxHxD)
Package Type  
Additional Information
Scan Code LN66780
Model Number SS-520GB
GTIN 4711173870784

Please note your statutory rights are not affected.

For further information regarding Scan's warranty procedure please see our terms and conditions

60 months
Return to base
DOA Period:
7 days
RTB Period:
60 months
Manufacturer Contact Details
Seasonic / Scan
0871 472 4747
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TekSpek Guides
Power Supplies
Power Supplies
Date Issued: 25th Oct 2017

Power-supply units, or PSUs, are an integral part of any computer build. Often overlooked, it is the component that is likely to last the longest, and it can be moved between systems when you upgrade to the latest and greatest in the future.

Read More

520W Seasonic S12II-520 Bronze Series, 80PLUS Bronze, Dual Rail 20A, 1x120mm Silent Fan, Fully Wired, ATX PSU is rated 5.0 out of 5 by 6.
Rated 5 out of 5 by from Perfect Value For Money This power supply cannot be matched on Amazon even for value. I recently built a new AMD based PC to replace my old Quad Core setup inside a good size tower case. The set up consisted of; AMD Ryzen 5 1600 CPU Asus B350 Plus Motherboard 16GB Corsair DDR4 300MHz Ram Zotac GeForce GTX 1060 6GB Ram The old power supply I had worked but was resulting in random crashes as it was simply not up to spec to feed this new set up with the juice it needed. It's great value for money and will fix any crashing problems you could be randomly getting when gaming with this GFX card.
Date published: 2018-06-20
Rated 5 out of 5 by from Awesome PSU Firstly it's built by Seasonic so you are purchasing quality. Its not flashy or lit up like a Christmas tree but will power your system with efficiency and its very quiet. Secondly if you do your research on computer components you will see Seasonic are in the top 3 manufacturers of PSU for quality, reliability and value. I cant recommend this PSU enough, has rave reviews and does exactly what its made to do without a fuss and showing off with flashing LED's.
Date published: 2018-04-20
Rated 5 out of 5 by from Great quality product for the money! This PSU is seriously good value for money, where other PSU's try to lure you with Gold ratings and more watts, this one just focuses on quality. Great buy if you're looking for a cheap and HQ PSU.
Date published: 2016-10-02
Rated 5 out of 5 by from Happy customer I had taken my time in making this purchase and reviewed other comparable 500W+ PSU's. Excellent choice imo. Product delivered on time, maybe a few too many email updates, but accepted that as excellent customer service. Well packeged etc.
Date published: 2016-04-01
Rated 5 out of 5 by from As you'd expect from SeaSonic There really isn't much to say about a power supply of this price range, except that its the quality that you would expect from a Seasonic made unit. Would recommend.
Date published: 2016-03-30
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Questions & Answers
Seasonic S1211-520 520W Power Supply - Fully Wired
Seasonic S1211-520 520W Power Supply - Fully Wired