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Main image of Lian Li RB 550W Power Supply, 80 Plus Bronze, ATX 3.1, PCIe 5.1 Ready, 135mm Low-Noise Fan, Built-in Cable Management, 5-Year Warranty, Non-Modular - Black (RB550B)

Alt view image 2 of 13 - Lian Li RB 550W Power Supply, 80 Plus Bronze, ATX 3.1, PCIe 5.1 Ready, 135mm Low-Noise Fan, Built-in Cable Management, 5-Year Warranty, Non-Modular - Black (RB550B)

Alt view image 3 of 13 - Lian Li RB 550W Power Supply, 80 Plus Bronze, ATX 3.1, PCIe 5.1 Ready, 135mm Low-Noise Fan, Built-in Cable Management, 5-Year Warranty, Non-Modular - Black (RB550B)

Alt view image 4 of 13 - Lian Li RB 550W Power Supply, 80 Plus Bronze, ATX 3.1, PCIe 5.1 Ready, 135mm Low-Noise Fan, Built-in Cable Management, 5-Year Warranty, Non-Modular - Black (RB550B)

Alt view image 5 of 13 - Lian Li RB 550W Power Supply, 80 Plus Bronze, ATX 3.1, PCIe 5.1 Ready, 135mm Low-Noise Fan, Built-in Cable Management, 5-Year Warranty, Non-Modular - Black (RB550B)

Alt view image 6 of 13 - Lian Li RB 550W Power Supply, 80 Plus Bronze, ATX 3.1, PCIe 5.1 Ready, 135mm Low-Noise Fan, Built-in Cable Management, 5-Year Warranty, Non-Modular - Black (RB550B)

Alt view image 7 of 13 - Lian Li RB 550W Power Supply, 80 Plus Bronze, ATX 3.1, PCIe 5.1 Ready, 135mm Low-Noise Fan, Built-in Cable Management, 5-Year Warranty, Non-Modular - Black (RB550B)

Alt view image 8 of 13 - Lian Li RB 550W Power Supply, 80 Plus Bronze, ATX 3.1, PCIe 5.1 Ready, 135mm Low-Noise Fan, Built-in Cable Management, 5-Year Warranty, Non-Modular - Black (RB550B)

Alt view image 9 of 13 - Lian Li RB 550W Power Supply, 80 Plus Bronze, ATX 3.1, PCIe 5.1 Ready, 135mm Low-Noise Fan, Built-in Cable Management, 5-Year Warranty, Non-Modular - Black (RB550B)

Alt view image 10 of 13 - Lian Li RB 550W Power Supply, 80 Plus Bronze, ATX 3.1, PCIe 5.1 Ready, 135mm Low-Noise Fan, Built-in Cable Management, 5-Year Warranty, Non-Modular - Black (RB550B)

Alt view image 11 of 13 - Lian Li RB 550W Power Supply, 80 Plus Bronze, ATX 3.1, PCIe 5.1 Ready, 135mm Low-Noise Fan, Built-in Cable Management, 5-Year Warranty, Non-Modular - Black (RB550B)

Alt view image 12 of 13 - Lian Li RB 550W Power Supply, 80 Plus Bronze, ATX 3.1, PCIe 5.1 Ready, 135mm Low-Noise Fan, Built-in Cable Management, 5-Year Warranty, Non-Modular - Black (RB550B)

Alt view image 13 of 13 - Lian Li RB 550W Power Supply, 80 Plus Bronze, ATX 3.1, PCIe 5.1 Ready, 135mm Low-Noise Fan, Built-in Cable Management, 5-Year Warranty, Non-Modular - Black (RB550B)

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Lian Li RB 550W Power Supply, 80 Plus Bronze, ATX 3.1, PCIe 5.1 Ready, 135mm Low-Noise Fan, Built-in Cable Management, 5-Year Warranty, Non-Modular - Black (RB550B)

Size: 550W

550W
650W
750W

Reliable 550W Power for Modern Builds: 80 PLUS Bronze efficiency for everyday gaming/creator PCs; stable output and active PFC to help keep power delivery consistent.
ATX 3.1 Platform + PCIe 5.1 Ready: Built to the ATX 3.1 standard.
Integrated Cable Management: Built-in routing channels + Velcro straps on the PSU housing help you tuck excess cable length for a cleaner back-side layout and better airflow.
Quiet Cooling: 135mm hydraulic-bearing fan optimized for low noise, providing efficient cooling and quiet operation under typical use.
5-Year Warranty.

🔥Don't forget your OS, we have Windows 11 OEM, Download and USB versions available

Overview

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80 PLUS Bronze certified up to 85% efficiency.
Compatible with Intel ATX 3.1 specification and designed with native PCIe Gen 5.1 12+4pin modular interface.
Unique cable management structure around PSU
135mm low-noise cooling fan
High amperage single +12V rail design
DC to DC design provide stable operation and enhanced voltage regulation
Built-in industry grade protections: OPPOVPSCPOCPUVPOTP
550W/650W/750W continuous output at 40°C/104°F operating environment.
Dimension: 150mm (W) x86mm (H) x150mm (D).
Safety approvals: CE/CB/cTUVus/TÜV/FCC/BSMI/CCC/KCC/SAA+RCM certifications.
5 years hardware protection.

Warranty & Returns

Warranty, Returns, And Additional Information

Warranty

Please contact the Seller directly for warranty information. Warranty information may also be found on the Manufacturer's website.
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Return Policies

Return for refund within: 30 days
Return for replacement within: 30 days
This item is covered by LIAN LI Return Policy

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Color	Black
Type	ATX (ATX 3.1 Compatible)
Maximum Power	550 W
Fans	1 x 135 mm HYB Fan
PFC	Active PFC, PF > 0.95 under full load @ 115Vac, 60Hz
Main Connector	20+4Pin
Modular	Non Modular
Energy-Efficient	80 PLUS BRONZE Certified
Protection	OPP/OVP/SCP/OCP/UVP/OTP
Input Voltage	100 - 240 V
Input Frequency Range	8A, 50-60Hz
MTBF	>100,000 Hours
Approvals	CE/CB/cTUVus/TÜV/FCC/BSMI/CCC/KCC/SAA+RCM
Connectors	Main Power (20+4Pin)600mm * 1pc ATX 12V (4+4Pin) EPS 4+4pin 650mm * 2pc PCIe 6+2 600+150mm * 1pc SATA (5Pin) / Peripheral (4Pin) SATA 400+150+150mm + PATA 150mm *1pc

Dimensions	150mm(W)x86mm(H)x150mm(D)
Weight	5 lbs

General
Brand	LIAN LI
Series	RB series

Item#: 9SIAFSTKJ90637