Article number: BN305

STRAIGHT POWER 11

550W Platinum

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STRAIGHT POWER 11

550W Platinum

World Class Quiet and Efficiency

be quiet! Straight Power 11 Platinum 550W raises the bar for systems that demand virtually inaudible operation and outstanding efficiency.

80 PLUS^® Platinum efficiency (up to 93.8%)
Virtually inaudible Silent Wings 3 135mm fan
Funnel-shaped fan opening of the PSU case for high airflow intake
Wire-free inside the PSU on the DC side for enhanced cooling and longevity
Modular cables for maximum build flexibility
Two PCIe connectors for powerful GPUs
Japanese 105°C-rated capacitors ensure stability and reliability
ErP and Energy Star 7.0 ready
5-year manufacturer’s warranty

Characteristics

80 PLUS^® PLATINUM CERTIFIED

One of the highest efficiency certificates available

Straight Power 11 Platinum 550W is certified with 80 PLUS Platinum efficiency, reaching up to 93.8%. This provides lots of benefits for your high-end system, including less power consumption and an overall cooler and quieter operation. The standby drain is below 0.1 watts.

SILENT WINGS 3 FAN

Provides virtually inaudible operation

The high-end Silent Wings 3 fan delivers best-of-class airflow yet produces very little noise. This is thanks to its unique, optimized fan blade design along with an advanced fluid-dynamic bearing and 6-pole fan motor that largely eliminates operational noise, has a super-long life and minimal power consumption.

FUNNEL-SHAPED FAN OPENING

Higher cooling performance

The fan inlet of the Straight Power 11 Platinum 550W is funnel-shaped. It causes an increased throughput of air which benefits to a higher cooling performance.

WIRE-FREE DESIGN INSIDE THE PSU

Pushing the longevity of components to a maximum

An absolute innovation: The Straight Power 11 Platinum 550W is wire-free on the DC side inside the PSU body. This results in improved cooling airflow and less signal disturbance, simply because of a lack of wiring, and ultimately pushes the lifetimes of the components to a maximum.

MODULAR CABLES

Utmost convenience and compatibility

Thanks to the modular cables, all cables that serve no purpose in the system are left out. For this reason, systems always appear very tidy. At the same time installation is performed much more conveniently. A smoother airflow results from the uncluttered layout of the system, which means lower noise and temperatures prevail inside the case.

STATE-OF-THE-ART TECHNOLOGIES

Rock-steady signal stability and efficiency

Experience the most technologically advanced power supply be quiet! has ever built! Using an advanced full bridge, LLC and Synchronous Rectifier (SR) technology it provides unmatched signal stability and unbeatable power efficiency. The DC-to-DC conversion for tight voltage regulation, even under heavy cross-loading conditions ensures reliable operation for the next generation of processors and graphics cards.

JAPANESE 105° CAPACITORS

A testament to high quality

Only the best components are used in Straight Power 11 Platinum 550W. That is why we have built only high-quality Japanese capacitors into the PSU chassis. They are rated to 105°C, ensuring stability, reliability and a long operating life.

All models at a glance:

Product Series

General data

Model	Straight Power 11 Platinum 550W
Continuous power (W)	550
Peak power (W)	600
Form factor	Version 2.51
Form factor EPS 12V	-
Modular Cable management	✓
Topology	Full bridge + 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)	0.16
Average life time (h / 25°C)	100,000
Operating temperature up to (°C)	40

Infographics

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						Output
						
									12V rails (multi-rail operation)4
								
									12V single rail operation-
								
									Overclocking key-
								
									+3.3V (A)22
								
									+5V (A)22
								
									+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)110
								
									Hold-up time at 100% load (ms)17
								
									Power good signal100 - 150ms
								
						Fan / Cooling technology
						
									Fan typeSilent Wings 3
								
									+SilentWings✓
								
									Motor technology6-pole fan motor
								
									Bearing technologyFDB
								
									Fan size (mm)135
								
									Max. fan speed (rpm), temperature-dependent1200
								
									Temperature control for case fans-
								
									dB(A) at 20% load9
								
									dB(A) at 50% load9.6
								
									dB(A) at 100% load14.9

						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 certificationPlatinum
								
									Efficiency (%) at 230V, 20% load92
								
									Efficiency (%) at 230V, 50% load93.8
								
									Efficiency (%) at 230V, 100% load92.8
								
						Environmental directives
						
									Energy Star7.0
								
									ErP✓
								
									WEEE✓
								
									RoHs✓

						Cables / Connectors
						
									Nvidia® SLI (RTX 3090) ready-
								
									Cable managementModular
								
									Sleeved cablesSleeved 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 cables8
								
									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
								
									PATA3
								
									SATA9
								
									FDD (Floppy)1
								
									External fan connectors-
								
						Casing
						
									Dimensions without cable (L x W x D), (mm)160 x 150 x 86
								
									Weight (kg)1.66
								
									ColorBlack

						Accessories
						
									Thumb screws-
								
									Screws✓
								
									Cable ties✓
								
									Velcro cable ties-
								
									Box/Bag for PSU/Cables-
								
									User manual languagesDE, EN, ES, FR, PL, RU
								
									OCK slot bracket with switch / OCK jumper-
								
									SFX-to-ATX adapter bracket-
								
						Service
						
									Warranty (Years)5
								
									Express replacement service in first yearDE, FR
								
									International hotline / free of charge✓ / DE, FR

						Logistics data, RRP
						
									Article numberBN305
								
									EAN code4260052187364
								
									Dimensions, package (L x W x H), (mm)328 x 248 x 102
								
									Gross weight, package (kg)2.84
								
									Pieces per packaging unit6
								
									Dimensions, shipping box (L x W x H), (mm)651 x 282 x 346
								
									Gross weight, shipping box (kg)20.6
								
									RRP (€)125.00

Upgrade Check

You are already using a be quiet! power supply and want to upgrade your system with a new STRAIGHT POWER 11 | 550W Platinum ? Check here which cables are compatible and don't need to be replaced.