Key Specifications
Choose one or multiple features to search for items that have the same specifications.Technical details | |
Sustainability compliance | ![]() |
Sustainability certificates | ENERGY STAR, ErP |
Ports & interfaces | |
Motherboard power connector | 20+4 pin ATX |
Floppy drive power connector | 1 |
Number of SATA power connectors | 3 |
Peripheral (Molex) power connectors (4-pin) | 2 |
CPU P4 connector (4-pin) | 1 |
PCI Express power connectors (6+2 pin) | 1 |
Cabling type | Non-Modular |
Motherboard power cable length | 35 cm |
SATA power cable length | 300,450,600 mm |
CPU power cable length | 40 cm |
Peripheral (Molex) power cable length | 300,450 mm |
PCI Express power cable length | 40 cm |
Floppy disk drive cable length | 60 cm |
Weight & dimensions | |
Weight | 840 g |
Height | 64 mm |
Width | 125 mm |
Depth | 100 mm |
Energy management | |
Peak power | 350 W |
Input current | 5/2 A |
Nominal power | 300 W |
Efficiency | 88.1% |
Hold time | 26.8 ms |
Power protection features | Over current, Over power, Over voltage, Overheating, Short circuit, Under voltage |
Power factor | 0.98 |
Power Factor Correction (PFC) type | Active |
Combined power (+3.3V) | 85 W |
Combined power (+12V) | 300 W |
Combined power (+5V) | 85 W |
Max output current (+3.3V) | 16 A |
Max output current (+5V) | 16 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 |
Max output current (+12V1) | 25 A |
Total power | 300 W |
Maximum input current (@110V) | 5 A |
Maximum input current (@220V) | 2 A |
Packaging data | |
Package weight | 1.19 kg |
Package depth | 75 mm |
Package height | 207 mm |
Package width | 197 mm |
Package type | Box |
Certificates | |
80 PLUS certification | 80 PLUS Bronze |
Design | |
Product colour | Black |
Number of fans | 1 fan(s) |
On/off switch | ![]() |
Cooling type | Active |
Fan diameter | 8 cm |
Performance | |
Mean time between failures (MTBF) | 100000 h |
Safety | CE, CB, TÜV, CU |
Noise level | 29.4 dB |
Purpose | PC |
Bearing technology | Rifle |
ATX version | 3.42 |
EPS version | 2.92 |
Power supply unit (PSU) form factor | SFX |
Logistics data | |
Shipping (inner) case width | 26.5 cm |
Shipping (inner) case length | 45.7 cm |
Shipping (inner) case height | 23.3 cm |
Shipping (inner) case gross weight | 7.91 kg |
Products per shipping (inner) case | 6 pc(s) |
Harmonized System (HS) code | 84733020 |
EAN | 4260052188262 |
Warranty | 5 years |
The be quiet! SFX Power 3 300W is the perfect compact PSU for mini and media PCs, offering an ideal mix of power, quiet operation, and reliability. With its 80 PLUS Bronze certification, this power supply provides excellent efficiency, saving you money on your electricity bill while reducing heat output. It's designed to support systems using a PCIe graphics card, ensuring stable performance for gaming and multimedia applications.
This SFX form factor PSU is tailored for small form factor builds, making it ideal for compact gaming PCs and HTPCs. It features a strong 12V rail, delivering 300W of continuous power to support demanding components. The high-quality, temperature-controlled 80mm fan ensures quiet operation, with a maximum noise level of 29.4 dB(A). Built with essential protection features, it safeguards your components against overcurrents, overvoltages, short circuits, and overloads.
Key Features- 300W continuous power output
- SFX form factor, ideal for compact systems
- 80 PLUS Bronze certification for high efficiency (up to 89.2%)
- Supports PCIe graphics cards with a 6+2 pin connector
- High-quality, temperature-controlled 80mm fan for quiet operation (max. 29.4 dB(A))
- Strong 12V rail for stable performance
- Sleeved or flat black cables up to 60cm
- Active Power Factor Correction (PFC)
- Full suite of protection features: OCP, OVP, SCP, UVP, and overload protection
- Meets the latest safety and efficiency requirements
- Designed for mini ITX PCs and compact gaming systems
- 3-year manufacturer’s warranty
- be quiet! SFX Power 3 300W power supply unit
- Power cord
- Mounting screws
- User manual
Estimated delivery: 08.04 - 10.04
Today: 10:00 - 18:00
Estimated delivery: 08.04 - 10.04
Today: 09:00 - 17:00
Estimated delivery: 08.04 - 10.04
Today: 10:00 - 17:00
Estimated delivery: 08.04 - 10.04
Today: 10:00 - 18:00
Estimated delivery: 08.04 - 10.04
Today: 10:00 - 18:00
Estimated delivery time: 08.04 - 10.04
Estimated delivery time: 09.04 - 10.04
Estimated delivery time: 08.04 - 09.04
Estimated delivery time: 09.04 - 10.04
Estimated delivery time: 09.04
Estimated delivery time: 09.04