We Accept POs from Fortune 500 Companies, Defense and Government Agencies (Federal, State, Local), Universities, Schools and Colleges.

be quiet! Straight Power 11 550W ATX Black power supply unit

be quiet! Straight Power 11 550W ATX Black power supply unit

(0 Reviews)
Category: Power Supplies
Availability: Out of Stock
Part Number: BN281
Manufacturer: be quiet!
Payment Methods: Visa American Express Discover Mastercard PayPal
Inc. VAT
MSRP:
Ex. VAT
MSRP:

-You Save:



REQUEST A QUOTE

Request a quote below or call 02079938331 for further assistance with this part number

Get exclusive discounts on bulk orders

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 SilentWings® 3 135mm fanBig funnel-shaped fan opening of the PSU case for high airflow intakeWire-free on the DC side inside the PSU for enhanced cooling and longevityFull cable management for maximum build flexibility80PLUS® Gold certification with an efficiency of up to 93%Advanced stability and voltage regulation thanks to LLC, SR and DC-to-DCFour high-performance 12V-railsPowerful multi-GPU support with two PCI-Express connectorsJapanese 105°C-rated capacitors ensure stability and reliabilityPower signal stability unmatched in its classErP and Energy Star 6.1 ready5-year manufacturer’s warrantyProduct conception, design and quality control in Germany Virtually inaudible SilentWings® 3 135mm fanWire-free design inside the PSU80PLUS® Gold efficiency of up to 93%Convenient full cable management

Power
Total power550 W
Peak power600 W
AC input voltage100 - 240
AC input frequency50 - 60
Input current8
Power factor0.99
Power Factor Correction (PFC) typeActive
Combined power (+3.3V)130 W
Combined power (+12V)549.6 W
Combined power (+5V)130 W
Combined power (-12V)3.6 W
Combined power (+5Vsb)15 W
Max output current (+3.3V)24 A
Max output current (+12V1)18 A
Max output current (+12V2)18 A
Max output current (+12V4)20 A
Max output current (+12V3)20 A
Max output current (+5V)24 A
Max output current (-12V)0.3 A
Max output current (+5Vsb)3 A
Power protection featuresOver current, Over power, Over voltage, Overheating, Short circuit, Under voltage
Hold time18.9 ms
Efficiency93%
Cooling
Fan diameter13.5 cm
Number of fans1 fan(s)
Ports & interfaces
Motherboard power cable length60 cm
SATA power cable length550 mm
PCI Express power cable length60 cm
CPU power cable length70 cm
Motherboard power connector20+4 pin ATX
Number of SATA power connectors9
Number of PATA power connectors3
PCI Express power connectors (6+2 pin)2
CPU power connector (4+4 pin)Yes
Floppy disk drive connectorYes
Cabling typeModular
Performance
Power supply unit (PSU) form factorATX
Silent modeYes
Noise level (quiet mode, 50%)9.46 dB
Noise level (silent mode, <30%)9.02 dB
Noise level (full-load mode, 100%)17.22 dB
PurposePC
ATX version2.4
EPS version2.92
On/off switchYes
Bearing technologyFDB
Design
Colour of productBlack
IlluminationNo
Technical details
Cable managementYes
Weight & dimensions
Width150 mm
Depth160 mm
Height86 mm
Weight1.51 kg
Certificates
80 PLUS certification80 PLUS Gold
Energy Star certifiedYes
CertificationCE, FCC, TÜV, cTUVus, RCM, BSMI, CU
RoHS complianceYes
Packaging data
Package depth328 mm
Package width248 mm
Package height102 mm
Package weight2.76 kg
Packaging content
Screws includedYes
Cable ties includedYes
ManualYes
Other features
Cable managementYes

    1. Non-Returnable Items: Once an order is processed, products that do not fall under 3D memory categories are considered final sale. These items cannot be cancelled or returned, so we strongly recommend confirming specifications prior to purchase.

    2. Restocking Policy: In specific cases, a restocking fee of up to 25% may be applied. This depends on the product category and condition. Our team will always advise you in advance where applicable.

    3. Product Condition: Unless clearly stated as brand-new retail stock, all products are supplied in professionally refurbished condition. Each item is thoroughly tested to ensure reliable performance and quality assurance.

    4. Fast Dispatch & Availability: We aim to dispatch most orders within 24 hours, subject to stock availability. If you require urgent or same-day shipping, please contact our customer support team at (207) 993-8331 directly for expedited handling.

    5. Part Number Compatibility: Leading manufacturers such as Dell, HP, IBM, and Compaq may assign multiple identifiers to the same product, including Spare Part Numbers (Spare P/N) or FRU (Field Replaceable Unit) numbers. The item you receive may carry either designation, both of which are fully compatible and functionally equivalent.

    6. Warranty Coverage: All products include a 30-day limited warranty, covering replacement in the event of DOA (Dead on Arrival) items with the same part number. Selected storage devices may qualify for an extended 90-day warranty—please confirm with our team before purchase. Additionally, manufacturer warranty options may intact for new product if any. 

    7. Drivers & Installation Media: As most products are supplied in bulk packaging, installation media such as CDs, drivers, or manuals may not be included. If required, please check availability with our sales team prior to ordering.

    8. Shipping Information: Standard shipping rates are automatically calculated for lightweight IT components such as memory and storage devices (under 5 lbs). For larger or heavier equipment—including servers, racks, and motherboards—shipping costs may vary. Our team will notify you if any adjustments are required. 

    9. Product Images Disclaimer: All images displayed are for reference purposes only. The actual product received may differ slightly in appearance while maintaining the same specifications and performance.

    10. Packaging Details: Some items may be delivered in bulk or non-retail packaging, especially for high-volume or consolidated orders. This ensures cost efficiency without compromising product quality.

    11. End-of-Life (EOL) Products: For discontinued or end-of-life products, we may supply an equivalent replacement with matching specifications, functionality, and compatible FRU where necessary.

    12. Refurbished Printers: Please note that refurbished printers may not include toner cartridges, or may be supplied with partially used consumables.

    13. Need Assistance? If you have any questions regarding product specifications, compatibility, warranty, or shipping, our team is here to help. Contact us at support@itnetworkstrade.co.uk or call us at (207) 993-8331 directly before placing your order to ensure a smooth purchasing experience.

    No reviews to show!

    GENERAL FAQs