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Key Specifications
Choose one or multiple features to search for items that have the same specifications.| Ports & interfaces | |
| PCI Express connector | ![]() |
| PCI Express power connectors (6-pin) | 1 |
| Motherboard power connector | 20+4 pin ATX |
| Number of SATA power connectors | 6 |
| Peripheral (Molex) power connectors (4-pin) | 3 |
| EPS power connector (8-pin) | ![]() |
| ATX power connector (20+4 pin) | ![]() |
| PCI Express power connectors (8-pin) | 1 |
| CPU power connector (4+4 pin) | ![]() |
| PCI Express power connectors (6+2 pin) | 1 |
| Cabling type | Semi-Modular |
| SATA power cable length | 690 mm |
| Peripheral (Molex) power cable length | 690 mm |
| PCI Express power cable length | 70 cm |
| Weight & dimensions | |
| Height | 86 mm |
| Width | 150 mm |
| Depth | 140 mm |
| Energy management | |
| Peak power | 550 W |
| Input current | 10 A |
| Nominal power | 550 W |
| Efficiency | 80% |
| Power Factor Correction (PFC) type | Active |
| Combined power (+3.3V) | 100 W |
| Combined power (+12V) | 540 W |
| Combined power (+5V) | 100 W |
| Combined power (-12V) | 3.6 W |
| Combined power (+5Vsb) | 12.5 W |
| Max output current (+3.3V) | 15 A |
| Max output current (+12V) | 45 A |
| Max output current (+5V) | 15 A |
| Max output current (-12V) | 0.3 A |
| Max output current (+5Vsb) | 2.5 A |
| AC input frequency | 50 - 60 Hz |
| AC input voltage | 100 - 240 V |
| Total power | 550 W |
| Operational conditions | |
| Operating temperature (T-T) | 0 - 50 °C |
| Certificates | |
| RoHS compliance | ![]() |
| 80 PLUS certification | 80 PLUS Gold |
| Design | |
| Product colour | Black |
| Illumination | ![]() |
| Number of fans | 1 fan(s) |
| Fan diameter | 12 cm |
| Performance | |
| Certification | Energy Star, RoHS, WEEE, ErP Lot 6, REACH |
| Mean time between failures (MTBF) | 100000 h |
| Safety | cTUVus, TUV, CB, CCC, BSMI, CE, FCC |
| Form factor | ATX |
| Purpose | PC |
| Bearing technology | Sleeve |
| Supported motherboard form factors | ATX |
| Silent mode | ![]() |
| Power supply unit (PSU) form factor | ATX |
| EAN | 4711173876786 |
| Warranty | 1 year |
The Seasonic G12 GC-550 is an ATX power supply unit that provides a total output of 550W, intended for mainstream and mid-range desktop computer systems. It carries an 80 PLUS Gold certification, which denotes a high level of energy efficiency that minimizes waste heat and reduces electricity consumption. This unit utilizes Active Power Factor Correction and is engineered to deliver consistent, stable power to internal components. Its standard ATX dimensions ensure compatibility with the majority of computer cases available on the market.
Cooling is handled by a 120 mm fan integrated with a Smart and Silent Fan Control (S2FC) system, which adjusts rotational speed based on system load to balance thermal performance with noise output. The semi-modular cabling design facilitates a cleaner build and improved internal airflow by allowing users to attach only the necessary peripheral cables. A full suite of protection circuits, including Over Power, Over Voltage, and Short Circuit Protection, is integrated to safeguard hardware from electrical anomalies. The unit is rated for a mean time between failures of 100,000 hours, indicating its design for long-term operational reliability.
Key Features:- 550W total power output
- 80 PLUS Gold certified
- ATX form factor
- Semi-modular cabling
- 120 mm fan with silent control
- Includes OCP, OPP, OVP, and SCP protections
- Provides 6 SATA and 1 PCIe (6+2 pin) connectors
- Measures 140 mm x 150 mm x 86 mm
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- leaflet (English)
- manual pdf (English)


