Msi Pro A550BN Bronze 550 Watt SMPS

The MSI Pro A550BN is a 550-watt non-modular ATX power supply from MSI's PRO series, carrying the 80 PLUS Bronze certification for up to 85% energy conversion efficiency. Whether you are assembling a mainstream desktop or upgrading an ageing system, this unit delivers stable, consistent power without unnecessary energy waste. At the heart of the A550BN is a DC-to-DC power conversion architecture that ensures tighter voltage regulation across the +3.3V, +5V, and +12V rails compared to traditional group-regulated designs. A single +12V rail topology simplifies power delivery to modern CPUs and discrete graphics cards, both of which draw the majority of their load from this rail. Active Power Factor Correction (Active PFC) allows the unit to work reliably with input voltages ranging from 100V to 240V at 50–60 Hz, making it compatible with Indian mains supply without any manual voltage switching. The 120mm sleeve-bearing fan provides adequate airflow for the internal components while keeping acoustic output at a reasonable level during everyday workloads. MSI has equipped the A550BN with a comprehensive set of protection mechanisms: Over-Current Protection (OCP), Over-Voltage Protection (OVP), Over-Power Protection (OPP), Over-Temperature Protection (OTP), Short-Circuit Protection (SCP), and Under-Voltage Protection (UVP). These safeguards work together to help shield connected components from power anomalies. Cable connectors use copper-alloy terminals designed to maintain a stable connection even during transient current surges. The non-modular cable harness includes enough connectors for a typical mid-range build without requiring adapters or splitters for most configurations. Verified Specifications: - Rated Output Power: 550W - Efficiency Certification: 80 PLUS Bronze (up to 85%) - Modular: Non-modular - Fan Size: 120mm, Sleeve Bearing - PFC Type: Active PFC - Input Voltage: 100–240V~ - Input Frequency: 50–60Hz - Dimensions (D x W x H): 140mm x 150mm x 86mm - ATX 24-pin connector: 1 - EPS 4+4-pin connector: 1 - PCIe 6+2-pin connectors: 2 - SATA 15-pin connectors: 5 - Peripheral 4-pin connectors: 2 - FDD 4-pin connector: 1 - Protections: OCP, OVP, OPP, OTP, SCP, UVP - Warranty: 5 Years