Seasonic B12 BC Bronze 550W

B12 BC Series

The B12 BC Series is available in the standard ATX Form Factor and in wattages that are most common for a PC system. The Seasonic B12 BC achieves 80 PLUS® Bronze standard of providing at least 82 %, 85 % and 82 % power usage efficiency at 20 %, 50 % and 100 % operating loads, respectively. This efficiency, combined with Active Power Factor Correction, enables the B12 BC series power supplies to lessen energy waste, which translates into savings on the costs of energy costs for its users. In addition to being greatly efficient, the B12 BC units utilize the LLC resonant converter design, and the industry’s leading Smart and Silent Fan Control (S2FC).

ATX 12 V
Fixed cables
80 PLUS Bronze Certified
5 Years Warranty
Dimensions: 140 mm (L) x 150 mm (W) x 86 mm (H)


B12-BC-550
Technical Specifications
80PLUS® Bronze
Cybenetics Efficiency Level TBA
Cybenetics Noise Level TBA
Form Factor Intel ATX 12 V
Dimensions 140 mm (L) x 150 mm (W) x 86 mm (H)
Fan Information Fan Size 120 mm
Fan Control Smart and Silent Fan Control
Fan Bearing Sleeve Bearing
Life Expectancy 25,000 hours at 40 °C, 15 % - 65 % RH
Cable Information Modularity Fixed cables
Cable type Flat black cables
Electrical Features Operating Temperature 0 - 50 °C (derating from 100 % to 80 % from 40 °C to 50 °C)
MTBF @ 25 °C, excl. fan 100,000 hours
AC Input Full Range
Protection OPP, OVP, OCP, SCP
Safety and Environmental Safety and EMC cTUVus, TUV, CB, CCC, BSMI, CE, FCC
Environmental Compliance Energy Star, RoHS, WEEE, ErP Lot 6, REACH
Warranty 5 Years