Bequiet Straight Power 11 550w Gold Modular Power Supply BN281
42 OMR
Ex Tax: 40 OMR
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Product Description
World Class Quiet and Efficiency
be quiet! Straight Power 11 550W raises the bar for systems that demand virtually inaudible operation without power quality compromises. This PSU is clearly the best choice for super silent systems.
- Virtually inaudible operation thanks to a Silent Wings 3 135mm fan
- Big funnel-shaped fan opening of the PSU case for high airflow intake
- Wire-free on the DC side inside the PSU for enhanced cooling and longevity
- Modular cables for maximum build flexibility
- 80 PLUS® Gold certification with an efficiency of up to 93%
- Advanced stability and voltage regulation thanks to LLC, SR and DC-to-DC
- Four high-performance 12V
-rails - Two PCIe connectors for powerful GPUs
- Japanese 105°C-rated capacitors ensure stability and reliability
- Power signal stability unmatched in its class
- ErP and Energy Star 6.1 ready
- Product conception, design and quality control in Germany
General data
| Model | Straight Power 11 550W |
| Continuous power (W) | 550 |
| Peak power (W) | 600 |
| Form factor | Version 2.4 |
| Form factor EPS 12V | Version 2.92 |
| Modular cable management | ✓ |
| Topology | LLC + SR + DC/DC |
| Wire-free design (DC-side) | ✓ |
| Voltage (Vac) | 100 - 240 |
| Frequency (Hz) | 50 - 60 |
| Input current (A) | 8 / 4 |
| PFC | active |
| Power factor at 100% load | >0.99 |
| Compliant to Intel C6/C7 | ✓ |
| Power consumption in standby (W) | <0.12 |
| Average life time (h / 25°C) | 100,000 |
| Operating temperature up to (°C) | 40 |
Output
| 12V rails (multi-rail operation) | 4 |
| 12V single rail operation | - |
| Overclocking key | - |
| +3.3V (A) | 24 |
| +5V (A) | 24 |
| +12V1 (A) | 18 |
| +12V2 (A) | 18 |
| +12V3 (A) | 20 |
| +12V4 (A) | 20 |
| +12V5 (A) | - |
| +12V6 (A) | - |
| -12V (A) | 0.3 |
| +5Vsb (A) | 3 |
| Max. combined power 12V (W) | 549.6 |
| Max. combined power 3.3V + 5V (W) | 130 |
| Hold-up time at 100% load (ms) | 18 |
| Power good signal | 100 - 500ms |
Fan / Cooling technology
| Fan type | Silent Wings 3 |
| +SilentWings | ✓ |
| Motor technology | 6-pole fan motor |
| Bearing technology | FDB |
| Fan size (mm) | 135 |
| Max. fan speed (rpm), temperature-dependent | 1500 |
| Temperature control for case fans | - |
| dB(A) at 20% load | 9 |
| dB(A) at 50% load | 9.5 |
| dB(A) at 100% load | 17.2 |
Protection
| OCP (over current protection) | ✓ |
| OVP (over voltage protection) | ✓ |
| UVP (under voltage protection) | ✓ |
| SCP (short circuit protection) | ✓ |
| OTP (over temperature protection) | ✓ |
| OPP (over power protection) | ✓ |
| SIP (Surge & Inrush Protection) | - |
Safety certification
| CE | ✓ |
| CB | ✓ |
| TÜV | ✓ |
| FCC | ✓ |
| cRUus | - |
| cTUVus | ✓ |
| RCM (Australia) | ✓ |
| BSMI | ✓ |
| CU (Russia) | ✓ |
| CCC | ✓ |
Eco / Efficiency
| 80 PLUS certification | Gold |
| Efficiency (%) at 230V, 20% load | 91.4 |
| Efficiency (%) at 230V, 50% load | 93 |
| Efficiency (%) at 230V, 100% load | 91.2 |
Environmental directives
| ENERGY STAR | 6.1 |
| ErP | ✓ |
| WEEE | ✓ |
| RoHS | ✓ |
Cables / Connectors
| Nvidia<sup>®</sup> SLI (RTX 3090) ready | - |
| Cable management | Modular |
| Sleeved cables | Sleeved cables |
| Flat cables | - |
| Cable length to mainboard (cm) | 60 |
| Cable length to first connector (cm) | 55 |
| Maximum cable length (cm) | 115 |
| All-in-one cable (SATA/PATA/FDD) | ✓ |
| No. of cables | 8 |
| ATX-Motherboard (20+4-pin) | 1 |
| P8 (CPU) | - |
| P4+4 (CPU) | 1 |
| P4 (CPU) | - |
| PCI-E 6-pin (GPU) | - |
| PCI-E 6+2-pin (GPU) | 2 |
| PATA | 3 |
| SATA | 9 |
| FDD (Floppy) | 1 |
| External fan connectors | - |
Casing
| Dimensions without cable (L x W x D), (mm) | 160 x 150 x 86 |
| Weight (kg) | 1.51 |
| Color | Black |
Accessories
| Thumb screws | - |
| Screws | ✓ |
| Cable ties | ✓ |
| Velcro cable ties | - |
| Box/Bag for PSU/Cables | - |
| User manual languages | DE, EN, ES, FR, PL, RU |
| OCK slot bracket with switch / OCK jumper | - |
| SFX-to-ATX adapter bracket | - |
Service
| Express replacement service in first year | DE, FR |
| International hotline / free of charge | ✓ / DE, FR |
Logistics data, RRP
| Article number | BN281 |
| EAN code | 4260052185766 |
| Dimensions, package (L x W x H), (mm) | 328 x 248 x 102 |
| Gross weight, package (kg) | 2.76 |
| Pieces per packaging unit | 6 |
| Dimensions, shipping box (L x W x H), (mm) | 651 x 282 x 346 |
| Gross weight, shipping box (kg) | 17.79 |
| RRP (€) | 115.00 |
for more information refer to bequiet.com
Item specifics
- Warranty Period One Year