MSI MAG A550BN 550W 80+ BRONZE
DZD 9 500
Description
80+ Bronze 550 Watt Power Supply
With the MSI MAG A550BN, you get a 550 watt 80PLUS Bronze certified power supply that delivers stable voltages to all your components. It features active power factor correction and a DC-DC topology for reliability and stability. Industrial grade OVP, OCP, OPP, OTP, SCP, UVP protection and a 1 year warranty add even more peace of mind to the use of this power supply.Key Features
- 80+ Bronze certification
- DC to DC circuit
- Active PFC correction factor
- Single 12V rail
- OCP, OVP, SCP, OPP and OTP procedures
- Quiet 120mm fan
MSI MAG A550BN 550W 80 PLUS Bronze
The MSI MAG A550BN is a 550 W ATX power supply designed for desktop gaming and general-purpose PCs. It combines 80 PLUS Bronze efficiency, a single +12 V rail, DC-to-DC circuit design, active PFC and a 120 mm low-noise fan. MSI’s official documentation confirms the supplied EAN 4719072849603 for this exact model.
Key Features
- Power: 550 W
- Efficiency: 80 PLUS Bronze, up to 85%
- Form factor: ATX
- Wiring: Non-modular
- +12 V design: Single rail
- DC-to-DC circuit design
- Active PFC
- Cooling: 120 mm low-noise fan with sleeve bearing
- Color: Black
- Protections: OCP, OVP, OPP, OTP and SCP
- Designed as an entry-level PSU for gaming and desktop PC builds.
Full Specifications
| Specification | Details |
|---|---|
| Brand | MSI |
| Series | MAG |
| Model | MAG A550BN |
| EAN | 4719072849603 |
| PSU Form Factor | ATX |
| Rated Power | 550 W |
| Efficiency Certification | 80 PLUS Bronze |
| Maximum Efficiency | Up to 85% |
| Modular | No / Non-modular |
| +12 V Configuration | Single rail |
| +12 V Output | 45.5 A / 546 W |
| +5 V Output | 20 A |
| +3.3 V Output | 20 A |
| -12 V Output | 0.3 A |
| +5VSB Output | 2.5 A |
| Active PFC | Yes |
| DC-to-DC Design | Yes |
| Fan Size | 120 mm |
| Fan Bearing | Sleeve bearing |
| Input Voltage | 100–240 V AC |
| Input Current | 8.0 A max. @ 115 V / 4.0 A max. @ 230 V |
| Input Frequency | 50–60 Hz |
| ATX Connector | 1 × 24-pin |
| EPS Connector | 1 × 4+4-pin |
| PCIe Connectors | 2 × 6+2-pin |
| SATA Connectors | 5 |
| Molex Connectors | 2 × 4-pin |
| FDD Connector | 1 × 4-pin |
| Protection | OCP / OVP / OPP / OTP / SCP |
| Dimensions | 150 × 140 × 86 mm |
| Color | Black |
The electrical output figures above come directly from MSI’s published datasheet: the +12 V rail provides 45.5 A / 546 W, while +5 V and +3.3 V provide 20 A each.
Connectors
The MAG A550BN provides the standard connections required for a typical desktop configuration:
- 1 × ATX 24-pin motherboard connector
- 1 × EPS 4+4-pin CPU connector
- 2 × PCIe 6+2-pin graphics-card connectors
- 5 × SATA
- 2 × 4-pin Molex
- 1 × FDD 4-pin connector
Because the PSU is non-modular, all of its cables are permanently attached to the power supply.
Cooling & Internal Design
The PSU uses a 120 mm sleeve-bearing fan designed for relatively quiet operation while providing airflow for heat dissipation. MSI also uses an active PFC circuit and DC-to-DC conversion, with the latter designed to improve output-voltage stability.
Protection Systems
The MAG A550BN includes five protection mechanisms:
- OCP — Over Current Protection
- OVP — Over Voltage Protection
- OPP — Over Power Protection
- OTP — Over Temperature Protection
- SCP — Short Circuit Protection
These are specified by MSI as part of the PSU’s protection system.
Dimensions
150 × 140 × 86 mm (W × D × H) according to MSI’s current specification pages and datasheet.
