Key Specifications
Choose one or multiple features to search for items that have the same specifications.Technical details | |
Sustainability certificates | ENERGY STAR |
Ports & interfaces | |
Motherboard power connector | 20+4 pin ATX |
Floppy drive power connector | 1 |
Number of SATA power connectors | 5 |
CPU power connector (4+4 pin) | ![]() |
PCI Express power connectors (6+2 pin) | 2 |
Cabling type | Semi-Modular |
Number of PATA power connectors | 2 |
Motherboard power cable length | 45 cm |
SATA power cable length | 550,670 mm |
CPU power cable length | 60 cm |
PCI Express power cable length | 50 cm |
Weight & dimensions | |
Weight | 1.49 kg |
Height | 86 mm |
Width | 150 mm |
Depth | 140 mm |
Energy management | |
Input current | 4 A |
Nominal power | 400 W |
Efficiency | 89% |
Hold time | 17 ms |
Power protection features | Over current, Over power, Over voltage, Overheating, Short circuit, Under voltage |
Power factor | 0.95 |
Power Factor Correction (PFC) type | Active |
Combined power (+3.3V) | 103 W |
Combined power (+12V) | 384 W |
Combined power (+5V) | 103 W |
Combined power (-12V) | 3.6 W |
Combined power (+5Vsb) | 15 W |
Max output current (+3.3V) | 24 A |
Max output current (+5V) | 15 A |
Max output current (-12V) | 0.3 A |
Max output current (+5Vsb) | 3 A |
AC input frequency | 50 Hz |
AC input voltage | 200 - 240 V |
Max output current (+12V2) | 18 A |
Max output current (+12V1) | 22 A |
Total power | 400 W |
Packaging data | |
Package weight | 2.11 kg |
Package depth | 268 mm |
Package height | 195 mm |
Package width | 97 mm |
Manual | ![]() |
Package type | Box |
Certificates | |
80 PLUS certification | 80 PLUS Bronze |
Packaging content | |
Cables included | PCIe, SATA |
Other features | |
Screws included | ![]() |
Noise level (quiet mode, 50%) | 9.7 dB |
Noise level (full-load mode, 100%) | 15 dB |
Noise level (silent mode, <30%) | 9.3 dB |
Design | |
Product colour | Black |
Number of fans | 1 fan(s) |
Cooling type | Active |
Fan diameter | 12 cm |
Performance | |
Certification | CE, CB, TÜV, RCM, CU |
Compatible products | Intel C6/C7 |
Purpose | PC |
Bearing technology | Sleeve |
ATX version | 2.51 |
Power supply unit (PSU) form factor | ATX |
Logistics data | |
Master (outer) case height | 556 mm |
Master (outer) case width | 311 mm |
Master (outer) case gross weight | 13.4 kg |
Master (outer) case length | 215 mm |
Products per master (outer) case | 6 pc(s) |
Harmonized System (HS) code | 84733020 |
EAN | 4260052187210 |
Warranty | 3 years |
The be quiet! System Power 9 Semi 400W power supply unit (PSU) is meticulously designed for system builders who prioritize stability and energy efficiency in their builds. Rated with a commendable 80 PLUS Bronze certification, this PSU ensures reliable power output, effectively reducing electricity costs while promoting overall system performance. Its semi-modular construction allows users to connect only the cables they need, enhancing airflow and providing an organized interior for any PC setup, be it for gaming, workstations, or home servers.
Built with dependability in mind, the System Power 9 Semi features high-quality Japanese capacitors that guarantee long-lasting performance and reliability. Safety features such as Over Voltage Protection (OVP), Under Voltage Protection (UVP), and Over Current Protection (OCP) safeguard your components against potential power fluctuations. Measuring an ATX form factor, it seamlessly integrates into a variety of cases, making it a versatile choice for any PC enthusiast seeking a blend of performance and peace of mind.
Key Features- Wattage output: 400W
- Form factor: ATX
- Modular type: Semi-modular
- 80 PLUS certification level: Bronze
- Cooling type: 120mm fan for efficient airflow
- Connectors: 1 x PCIe, 4 x SATA, 1 x CPU EPS
- Voltage compatibility: 100–240V input, active PFC for stability
- Protection features: OCP, OVP, UVP, SCP
- Noise level: Optimized for quiet operation
- Build quality: Japanese capacitors for enhanced durability
- Warranty length: 3 years
- Power supply unit
- Modular cables
- Power cord
- Mounting screws
- User manual
- Cable ties for organization
Estimated delivery: 30.04 - 06.05
Today: Closed (Good Friday)
Estimated delivery: 30.04 - 06.05
Today: 09:00 - 17:00
Estimated delivery: 30.04 - 06.05
Today: Closed (Good Friday)
Estimated delivery: 30.04 - 06.05
Today: Closed
Estimated delivery: 30.04 - 06.05
Today: Closed (Good Friday)
Estimated delivery time: 30.04 - 06.05
Estimated delivery time: 01.05 - 06.05
Estimated delivery time: 30.04 - 05.05
Estimated delivery time: 01.05 - 06.05
Estimated delivery time: 01.05 - 05.05
Estimated delivery time: 01.05 - 05.05